Embodiments of the present disclosure relate to an excavator for detecting the rotation of an upper body and an operation method thereof. According to an embodiment, the excavator comprises: a lower body; an upper body loaded on the lower body to be rotatable; a sensor device which is configured to collect sensing information regarding the rotation of the upper body relative to the lower body; and a processor electrically connected to the sensor device, wherein the processor can control so as to sense the generation of a dead zone on the basis of sensing information collected by the sensor device, so as to correct the sensing information in response to the sensing of the dead zone generation, and so as to calculate a rotation angle with respect to the upper body on the basis of the corrected sensing information.
Embodiments disclosed herein relate to an autonomous work excavator and an operation method therefor. According to an embodiment, an autonomous work excavator comprises: a front work device including an arm, a boom, and a bucket; a sensor device configured to collect state information about the excavator and information relating to the surrounding environment; and a processor electrically connected to the front work device and the sensor device. The processor can control so as to: conduct an excavation operation on the basis of work instructions so that earth and sand are loaded in the bucket; calculate the zero moment point (ZMP) of the force acting on the excavator on the basis of mass information about at least a portion of the front work device after the excavation operation; and acquire a work trajectory for processing the earth and sand loaded in the bucket by using the information relating to the ZMP and the surrounding environment.
The drive means generates an amount of displacement for moving the movable engaging jaw but the release block is not moved and a second stage where the drive means generates an amount of displacement for moving the movable engaging jaw above a threshold amount where the release block is moved.
A construction machine, according to an embodiment of the present invention, including a boom comprises: a boom cylinder which elevates the boom and is divided into a head side and a rod side; a boom valve which controls a flow rate of working fluid discharged from the head side of the boom cylinder, and in which an opening area is adjusted while a spool is displaced according to a received pilot pressure; an electro-proportional pressure reducing valve for the boom valve, which generates the pilot pressure to be transmitted to the boom valve; an operation device which generates an operation signal for operation of the boom; and a control device which calculates a target passage flow rate of the boom valve corresponding to the operation signal of the operation device and the opening area of the boom valve through which the target passage flow rate passes, calculates the pilot pressure that must be transmitted to the boom valve to achieve the opening area, and transmits a current reference value to the electro-proportional pressure reducing valve for the boom valve such that the electro-proportional pressure reducing valve generates the calculated pilot pressure.
A construction machine, according to an embodiment of the present invention, including a boom comprises: a boom cylinder which elevates the boom and is divided into a head side and a rod side; a boom regeneration valve which controls the flow rate of a working fluid discharged from the head side of the boom cylinder; an operation device which generates an operation signal for operation of the boom; an accumulator which stores the working fluid discharged from the boom cylinder; a regenerative motor which generates regenerative energy by performing a regenerative operation by using the working fluid discharged from the boom cylinder or discharged from the accumulator; and a control device which corrects an opening area of the boom regeneration valve on the basis of the pressure of the accumulator when the boom is lowered.
A hybrid power distribution system for a construction machine, according to an embodiment of the present invention, comprises: a power-generation unit inverter which receives three-phase AC power from a power-generation unit generator of a power-generation unit driver operated by an engine to output a DC current; a power distribution device which is connected to the power-generation unit inverter, is connected to a traveling unit and a working unit of a construction machine, receives the DC current, and distributes power to the traveling unit and the working unit; and a control unit which calculates a load amount necessary for the traveling unit and the working unit, and controls the power-generation unit generator through the power-generation unit inverter on the basis of the load amount necessary for the traveling unit and the working unit, wherein the power distribution device comprises a traveling unit initial charging unit electrically connected to the traveling unit.
Embodiments of the present disclosure relate to an autonomous work construction machine and an operation method thereof. According to an embodiment, the autonomous work construction machine comprises: a communication device configured to transmit and receive a signal; a sensor device configured to collect information related to the state of the construction machine and the surrounding environment; and a processor electrically connected to the communication device and the sensor device. The processor can control the construction machine to: acquire, from an external device, work instructions that include an instructed task and are for executing the instructed task on the basis of an autonomous work mode; acquire a work plan determined on the basis of the work instructions and composed of work required to execute the instructed task among work that can be executed by the construction machine; and operate in an autonomous work mode to execute the instructed task according to the work plan.
Embodiments of the present disclosure relate to an autonomous working construction machine and an operation method thereof. According to an embodiment, an autonomous driving-based construction machine comprises: a communication device configured to transmit and receive a signal; a positioning device configured to collect information related to the location of the construction machine; and a processor electrically connected to the communication device and the positioning device, wherein the processor may obtain a work processing point within a working area, on the basis of a work instruction obtained via an external device or the communication device, obtain a work path to the work processing point, obtained on the basis of the information related to the location of the construction machine, obtain a movement trajectory of the construction machine for moving to the work processing point, on the basis of the work path, and control the construction machine to operate on the basis of the movement trajectory.
A hybrid power generation measurement system for construction machines according to one embodiment in the present specification comprises: a power distribution device that is connected to a driving unit and a working unit of a piece of construction equipment and distributes input power; an inverter for a power generation unit which receives an input of three-phase alternating current power from an engine-operated generator for the power generation unit and outputs direct current; a current sensor that is disposed between an output terminal of the inverter for the power generation unit and the power distribution device and measures a current value output from the inverter for the power generation unit; and a control unit which receives the current value sensed by the current sensor and controls the operation of the power distribution device on the basis of the current value.
G01R 21/00 - Arrangements for measuring electric power or power factor
G01R 31/00 - Arrangements for testing electric propertiesArrangements for locating electric faultsArrangements for electrical testing characterised by what is being tested not provided for elsewhere
H02J 7/14 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
A tooth adapter, according to various embodiments of the present invention, for coupling a tooth point to a working device of a construction machine comprises: a coupling part coupled to the working device; and a nose part formed at the front end of the coupling part to be coupled to the tooth point, wherein the nose part can include: a top surface part including an inclined part of which at least a partial region is inclined with respect to the longitudinal axis when viewed from the side; a bottom surface part of which at least a partial region is formed in parallel to the longitudinal axis; side surface parts including a one-side surface part and an other-side surface part which connect the top surface part and the bottom surface part; and a front surface part formed at the front end of the nose part.
An excavator according to the present invention comprises a display device, a control unit, a limit height setting unit, and a warning height setting unit. The display device displays the shapes of a boom, an arm, and a bucket of the excavator and the terrain in which the excavator is located. The control unit calculates the maximum heights of each of the boom, the arm, and the bucket from the ground. The limit height setting unit is provided in the display device, and a limit height required for operations in the terrain in which the excavator is located is set by a user. The warning height setting unit is provided in the display device and sets a warning height lower than the limit height. The display device displays the limit height and the warning height along with the terrain in which the excavator is located.
A construction machine according to an embodiment of the present invention comprises: a main pump; a swing motor operated by hydraulic oil supplied from the main pump; a swing valve for controlling the hydraulic oil that the main pump supplies to the swing motor; a swing hydraulic line connecting the swing valve and the swing motor; an accumulator for storing the hydraulic oil discharged from the swing motor; a regenerative hydraulic line for moving, to the accumulator, the hydraulic oil discharged from the swing motor; a hydraulic oil control valve which is installed on the swing hydraulic line and connected to the regenerative hydraulic line, and which moves the hydraulic oil to one selected from among the swing motor and the accumulator; a pressure control valve installed on the regenerative hydraulic line; and a control unit for controlling the pressure control valve and the hydraulic oil control valve according to the pressure of the accumulator and whether the swing motor is accelerating or decelerating.
The present invention relates to a construction machine, comprising: an engine which generates power; a pump which generates hydraulic pressure by receiving the power generated by the engine; a main control valve which receives a signal fluid from the pump; a key switch which can turn the power of an electronic unit on and off; an engine control unit which maintains the operation of the engine for a predetermined time before stopping same when the key switch is switched to an OFF state from an ON state at which the power of the electronic unit can be turned on; and a pilot cut-off valve which opens and closes the signal fluid in accordance with a state of the key switch. Accordingly, it is possible to prevent accidents due to the engine control unit.
A method for providing a construction machinery maintenance manual provides an augmented reality content selection menu for the provision of a construction machinery maintenance manual. A user's content selection signal is received. A virtual 3D model corresponding to the construction machinery is augmented on a display unit in response to the content selection signal. Augmented reality maintenance manual information is displayed on a corresponding position of the 3D model according to the content selection signal.
G06F 3/0484 - Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
15.
REINFORCEMENT MEMBER FOR EXCAVATOR BUCKET, AND EXCAVATOR BUCKET COMPRISING SAME
SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION (Republic of Korea)
Inventor
Lee, Choungrae
An, Sangmin
Park, Haeji
Choi, Haecheon
Kim, Jaerim
Abstract
Reinforcement members for an excavator bucket, according to various embodiments of the present invention, are arranged in an excavator bucket, wherein each of the reinforcement members may comprise: a plate-shaped body part formed to extend in the width direction of the bucket; and protrusion parts protruding backward from the rear end of the body part.
SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION (Republic of Korea)
Inventor
Lee, Choungrae
An, Sangmin
Park, Haeji
Choi, Haecheon
Kim, Jaerim
Abstract
A drilling tooth according to various embodiments of the present invention, which is a drilling tooth joined to a bucket, comprises: a joining part which is joined to the bucket; and a drilling part for performing a drilling operation. The drilling part includes a horizontal portion extending in the front and rear directions at the center of a lower surface portion, and at least one stepped groove formed from the horizontal portion toward a side portion. The stepped groove may be formed to be stepped through a first stepped surface adjacent to the horizontal portion and a second stepped surface formed so as to be adjacent to the side portion at a constant angle with the first stepped surface.
A construction machine according to an embodiment of the present invention comprises: a boom cylinder for driving a boom; a swing motor for swinging a swing body; an arm cylinder for driving an arm; a bucket cylinder for driving a bucket; a first main pump which discharges working oil in two directions and supplies the working oil to the boom cylinder; a second main pump which discharges working oil in two directions and supplies the working oil to the swing motor; and a third main pump which supplies working oil to the arm cylinder or the bucket cylinder.
An apparatus for controlling the injection of a reductant for selective catalytic reduction comprises: a reductant injection module which is installed in an engine exhaust pipe and injects a reductant for reducing nitrogen oxides in exhaust gas; a reductant concentration sensor which measures the concentration of the reductant being fed to the reductant injection module; and a reductant injection amount control unit which determines a correction value for an injection amount of the reductant according to the measured concentration of the reductant, and controls the injection amount of the reductant injection module so that the reductant can be injected in an injection amount with the correction value determined.
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
F02D 41/02 - Circuit arrangements for generating control signals
The present invention relates to an exhaust gas after-treatment system for after-treatment of an exhaust gas. The exhaust gas after-treatment system according to an embodiment of the present invention comprises: a diesel particulate filter for removing a particulate material contained in an exhaust gas; a differential pressure sensor for measuring a differential pressure of the exhaust gas that has passed through the diesel particulate filter; and a control device that stores data of differential pressure reference values according to flow rates of the exhaust gas, obtains exhaust gas flow rate information, selects a differential pressure reference value according to the obtained exhaust gas flow rate information, and compares the differential pressure of the exhaust gas measured by the differential pressure sensor with the selected differential pressure reference value to diagnose whether there is an abnormality or not in the diesel particulate filter.
F01N 11/00 - Monitoring or diagnostic devices for exhaust-gas treatment apparatus
F01N 3/021 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
F02D 41/02 - Circuit arrangements for generating control signals
20.
CONTROL SYSTEM FOR CONSTRUCTION MACHINE AND CONTROL METHOD FOR CONSTRUCTION MACHINE
A control system for a construction machine comprises: a door latch device including a tilt sensor for detecting the inclination angle of the construction machine parked on a slope, a lock/unlock actuator for locking/unlocking a door of the construction machine according to a door lock control signal and a door unlock control signal, and a release actuator for releasing the door according to a door release control signal; and a smart key module that outputs the door unlock control signal and the door release control signal when an unlocking event signal is detected while in a state in which a smart key is recognized and the inclination angle of the construction machine is within a preset safe range.
B60R 25/34 - Detection related to theft or to other events relevant to anti-theft systems of conditions of vehicle components, e.g. of windows, door locks or gear selectors
B60R 25/10 - Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
B60R 25/24 - Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
The present invention relates to a user authentication method for construction equipment, capable of preventing theft of construction equipment. The user authentication method for construction equipment according to an embodiment of the present invention comprises: a user information registration step for registering a user's identification information provided from a user device; a digital key issuance step for, upon request for use of construction equipment from the user device, generating a digital key corresponding to the construction equipment and transmitting the generated digital key to the user device; and an equipment authentication step for allowing the use of the construction equipment when the user device which has received the digital key completes authentication of the identification information via the digital key.
G06F 21/32 - User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
G06F 21/33 - User authentication using certificates
H04L 9/32 - Arrangements for secret or secure communicationsNetwork security protocols including means for verifying the identity or authority of a user of the system
According to a method of creating an operation plan of construction machinery, information on construction machinery at a worksite may be obtained. The information on the construction machinery may be received via wireless communication. The information on the construction machinery may be displayed on a display unit of a server. By using the information on the construction machinery and information stored in the server, an operation plan for the construction machinery may be created on the display unit of the server. The operation plan may be transmitted to the construction machinery. Thus, as the operation quality and/or operation time of the construction machinery are less dependent on the skill of an operator, the operation quality can be improved while reducing the operation time.
G06F 3/0484 - Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
According to a method for drawing up a work plan of a construction machine, location information of a construction machine may be received from the construction machine located in a work site. Information of main management zones of the work site may be displayed on a display part of a server. A driving route start point and end point of the construction machine may be displayed on the display part of the server by using the location information of the construction machine. A driving route between the start point and the end point may be created using the information of the main management zones. The created driving route may be transmitted to the construction machine.
G06F 3/0484 - Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling
According to a control method for a construction machine, the position of an obstacle around a construction machine is detected during operation thereof. It is determined whether the obstacle is located in a safe area or a deceleration area closer to the construction machine than is the safe area. When the obstacle is located in the deceleration area, the swing speed of a swing motor is decelerated according to the distance to the obstacle.
Disclosed are a construction machinery provided with an automatic transmission device and a transmission control method. The construction machinery comprising an automatic transmission device, according to the present invention, comprises: an engine; a hydraulic pump; a driving motor; a transmission; and a control unit for performing automatic transmission, wherein the control unit has an uphill function capable of preventing upshift, compares a current ascending grade to a predetermined reference grade, and if the ascending grade is steeper than the reference grade, may activate the uphill function.
The present invention relates to a power supply device of an electric excavator, and the power supply device of an electric excavator comprises: a power supply unit for supplying battery power to an electric motor unit; a first charging port which is connected to the power supply unit and which supplies first external power to the battery; an OBC which is connected to the power supply unit, and which converts alternating current into direct current when alternating current power is inputted; and a second charging port which is connected to the OBC, and which supplies second external power to the OBC, wherein the power supply unit supplies the charged power of the OBC or the charged power of the OBC and the power of the battery to the electric motor unit on the basis of the amount of required electricity of the electric motor unit and the amount of charging electricity of the OBC.
B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
B60L 50/51 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
B60L 1/00 - Supplying electric power to auxiliary equipment of electrically-propelled vehicles
27.
LOADING WEIGHT MEASUREMENT METHOD OF CONSTRUCTION MACHINE
A loading weight measurement method of a construction machine may comprise: measuring the weight of a load loaded in a bucket while performing construction work using a work apparatus of the construction machine; determining whether or not a bucket unloading condition is satisfied at a certain point in time during the construction work; if the bucket unloading condition is satisfied, calculating a link parameter by using output values collected from sensors attached to the construction machine; and comparing the difference between the calculated link parameter (hereinafter referred to as a new link parameter) and a link parameter that has been used to measure the weight of the load (hereinafter referred to as a previous link parameter), to update the previous link parameter with the new link parameter.
A construction machine, according to an embodiment of the present invention, including a boom comprises: an engine for generating power; a main pump driven by means of the engine so as to discharge working fluid; a working fluid tank for storing the working fluid to be discharged by the main pump; a boom cylinder which raises and lowers the boom, and which is divided into a head side and a rod side; a regeneration line connected to the head side of the boom cylinder so that the working fluid discharged from the head side of the boom cylinder moves therein; a regeneration motor operated with working fluid, having moved through the regeneration line, so as to support the engine; an accumulator connected to the regeneration line so as to accumulate the working fluid discharged from the boom cylinder; a boom regeneration valve for opening and closing the regeneration line; and a main control valve for controlling the supply, to the boom cylinder, of the working fluid discharged by the main pump, and discharging, to the working fluid tank, some of the working fluid discharged from the head side of the boom cylinder during a lowering operation of the boom.
The present disclosure relates to a soil distribution plan establishment system. The soil distribution plan establishment system according to an embodiment comprises: a grid model generation module for generating a 3D grid model by receiving information on a 3D terrain, a ground, and a target model to divide a target area; an earthwork volume calculation module for calculating an earthwork volume for each grid model generated by the grid model generation module and storing same in a database; and an earthwork volume distribution module for distributing the earthwork volume of a cut area to an embankment area on the basis of the earthwork volume stored in the database.
A system for monitoring caterpillar tension is disclosed. A system for monitoring caterpillar tension according to the present invention comprises: a pressure sensor unit which is provided in a lubricant supply controller formed at a side of a piston having a flow passage communicating with the inside of a track cylinder and which measures the internal pressure in the piston; a control unit which calculates the track tension according to the internal pressure in the piston transferred from the pressure sensor unit and determines whether the track tension is in a normal range and greater than or less than the normal range; and an output unit which displays the track tension determined by the control unit or a warning or dismissal of warning with respect to the corresponding track according to the track tension.
In a method for monitoring track tension in construction machinery, data on important factors for monitoring track tension are received. A machine learning algorithm is performed on the basis of the data to determine the track tension state. Information about the track tension state is displayed.
G01L 5/04 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
In a method for registering a smart key of a construction machine, a first code number is generated by a smart key module embedded in the construction machine. A user setting graphic interface means through which a user can input a code number by using the smart key module or a user terminal is provided to the user. The smart key module compares a code number input by the user with the first code number, so as to perform authentication. When the input code number is authenticated, an authentication number of the surrounding smart key recognized by the smart key module is registered as a new registration authentication number.
B60R 25/24 - Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
B60R 25/102 - Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device a signal being sent to a remote location, e.g. a radio signal being transmitted to a police station, a security company or the owner
A construction machine according to an embodiment of the present invention comprises: an engine; a boom cylinder divided into a head side and a rod side; a regeneration line connected to the head side of the boom cylinder and through which hydraulic fluid discharged from the head side of the boom cylinder moves when a boom descends; a regeneration motor operating in connection with the regeneration line and assisting the engine; a pilot pump for generating a pilot pressure; a pilot line through which a pilot hydraulic fluid discharged from the pilot pump moves; a regeneration connection line connecting the pilot line and the regeneration line to each other; an on/off valve provided on the regeneration connection line; and a control device which closes the on/off valve when the pressure of the pilot line falls below a preset pressure or hydraulic fluid discharged from the boom cylinder is supplied to the regeneration motor.
A quick hitch coupler (1) for coupling an attachment (2) to a dipper arm (3) of an excavator, the quick hitch coupler comprising: • (a) a body member (12) adapted for coupling to the dipper arm, • (b) a fixed engaging jaw (20) mounted on the body member for engaging a first one (10) of a pair of coupling pins mounted on the attachment, • (c) a moveable engaging jaw (40) mounted on the body member for engaging a second one (11) of the pair of coupling pins of the attachment, the moveable engaging jaw being moveable between an engaged state with the moveable engaging jaw engaging the second coupling pin while the fixed engaging jaw engages the first coupling pin for coupling the attachment to the coupler, and a disengaged state for disengaging the second coupling pin, • (d) a latch (30) co-operable with the fixed engaging jaw for retaining the first coupling pin (10) of the attachment engaged in the fixed engaging jaw the latch being alternately operable in a latched state co-operating with the fixed engaging jaw for retaining the first coupling pin in the fixed engaging jaw, and an unlatched state for releasing the first coupling pin from the fixed engaging jaw • (e) an urging means (36) for urging the latch into the latched state, • (f) a release block (61) being moveable on (and relative to) a guide (63), the release block being moveable on the guide between a non-active position in which the latch remains in the latched state and an active position where the release block abuts against the latch to move the latch from the latched state to the unlatched state against the urging action of the urging means, • (g) a drive means (50) generating an amount of displacement: • (i) for moving the moveable engaging jaw (40) from the engaged state to the disengaged state, and • (ii) for moving the release block (61) on the guide (63) from the non-active position to the active position.
A quick hitch coupler (1) for coupling an attachment (2) to a dipper arm (3) of an excavator, the quick hitch coupler comprising: (a) a body member (12) adapted for coupling to the dipper arm, (b) a fixed engaging jaw (20) mounted on the body member for engaging a first one (10) of a pair of coupling pins mounted on the attachment, (c) a moveable engaging jaw (40) mounted on the body member for engaging a second one (11) of the pair of coupling pins of the attachment, the moveable engaging jaw being moveable between an engaged state with the moveable engaging jaw engaging the second coupling pin while the fixed engaging jaw engages the first coupling pin for coupling the attachment to the coupler, and a disengaged state for disengaging the second coupling pin, (d) a latch (30) co-operable with the fixed engaging jaw for retaining the first coupling pin (10) of the attachment engaged in the fixed engaging jaw the latch being alternately operable in a latched state co-operating with the fixed engaging jaw for retaining the first coupling pin in the fixed engaging jaw, and an unlatched state for releasing the first coupling pin from the fixed engaging jaw (e) an urging means (36) for urging the latch into the latched state, (f) a release block (61) being moveable on (and relative to) a guide (63), the release block being moveable on the guide between a non-active position in which the latch remains in the latched state and an active position where the release block abuts against the latch to move the latch from the latched state to the unlatched state against the urging action of the urging means, (g) a drive means (50) generating an amount of displacement: (i) for moving the moveable engaging jaw (40) from the engaged state to the disengaged state, and (ii) for moving the release block (61) on the guide (63) from the non-active position to the active position.
The present invention relates to a valve control apparatus for an engine, wherein the valve control apparatus opens and closes an exhaust valve and an intake valve of the engine while rotating in conjunction with a crankshaft of the engine. A valve control apparatus for an engine according to an embodiment of the present invention comprises: an exhaust valve opening/closing device for opening and closing the exhaust valve during a first exhaust valve opening period; and an intake valve opening/closing device for opening and closing the intake valve during a first intake valve opening period.
A turbo compounding system, according to an embodiment of the present invention, comprises: a supercharger including a turbine rotated by the pressure of an exhaust gas discharged from an engine and a compressor rotated by the rotational power of the turbine and compressing and supplying fresh external air to the engine; a motor-generator that is rotated by the rotational power of the compressor of the supercharger to generate electric power or adds rotational power to the compressor of the supercharger; and a control device that operates the motor-generator as a motor or a generator according to the current rotational speed of the engine, wherein power lost in the engine may be recovered.
F02B 41/10 - Engines with prolonged expansion using exhaust turbines
F02B 39/10 - Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
F02B 63/04 - Adaptations of engines for driving pumps, hand-held tools or electric generatorsPortable combinations of engines with engine-driven devices for electric generators
F01N 5/04 - Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
H02J 7/14 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
A control system for construction equipment comprises: a hydraulic cylinder operable by working fluid discharged from a hydraulic pump; a control valve arranged between the hydraulic pump and the hydraulic cylinder, controlling an operation of an actuator according to a position of a spool installed therein, and having a first spool position for discharging, to a drain tank, the working fluid discharged from a chamber of the hydraulic cylinder; and a pressure compensation valve installed in a return hydraulic line for discharging, to the tank, the working fluid discharged from the control valve at the first spool position, and controlling a flow rate of the working fluid passing therethrough according to a difference in pressure between the front end and the rear end of the control valve.
The present invention relates to a method for measuring a ground tilt angle in construction equipment. An acceleration measurement value and a vehicle speed measurement value of the construction equipment that drives along the ground having a predetermined slope are obtained by an acceleration sensor and a driving speed sensor mounted in the construction equipment. A driving acceleration component on the ground is calculated from the vehicle speed measurement value. A gravity acceleration component acting along the ground is calculated by adding or subtracting the calculated driving acceleration component to or from the acceleration measurement value. The tilt angle of the ground is calculated by applying the calculated gravity acceleration component to a dynamic equation relating to the acceleration acting along the ground.
An electrohydraulic control device for a construction machine comprises: a control valve, installed in a hydraulic line between a hydraulic pump and an actuator, for controlling an operation of the actuator according to the amount of displacement of a spool provided therein; a spool displacement adjusting valve for outputting a secondary pressure proportional to an input pressure command signal to a spool of the control valve to control the amount of displacement of the spool of the control valve; a pressure sensor for detecting the secondary pressure output from the spool displacement adjusting valve; and a control unit for outputting a pressure command signal to the spool displacement adjusting valve in accordance with an operation signal of the construction machine and correcting the pressure command signal when the pressure difference between the detected secondary pressure and a predetermined design pressure by the pressure command signal deviates from a predetermined allowable range.
A canopy assembly comprises: a lower canopy fixedly provided at one side of a driver seat and having a pair of first and second lower pipes extending upward; a pair of fastening blocks respectively inserted into and fixed to the first and second lower pipes and having accommodation holes formed to extend inward from the upper surface thereof; and an upper canopy having a pair of first and second upper pipes respectively inserted into and fixed to the accommodation holes of the fastening blocks.
A piston for a diesel engine comprises a body having an upper surface formed in a ring shape around the center shaft thereof and a combustion chamber which is concavely recessed from the upper surface of the body and in which air and fuel injected from an injector are mixed. The combustion chamber comprises a first bowl, a second bowl, and a lip disposed therebetween, wherein the second bowl is formed above the first bowl, the lip protrudes toward the center shaft, and the second bowl comprises a bowl guide portion which radially extends from the lip and is inclined at a first acute angle with respect to the center shaft.
F02F 3/26 - Pistons having combustion chamber in piston head
F02B 23/06 - Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
43.
EMERGENCY DRIVING SYSTEM FOR CONSTRUCTION EQUIPMENT
The present invention relates to construction equipment capable of emergency starting and emergency driving, comprising: a vehicle control device; an auxiliary mode switch connected to the vehicle control device; first and second control valves connected to the auxiliary mode switch; an auxiliary mode selection switch connected to the vehicle control device; a straight forward traveling control valve connected to the auxiliary mode selection switch; and a first work mode register, a second work mode register, a first driving mode register, a second driving mode register, and an auxiliary mode relay, which are connected to the auxiliary mode selection switch.
A braking control device of a construction machine, comprises: first and second brake lines for supplying brake fluid to a front braking device and a rear braking device of the construction machine, respectively; first and second proportional flow control valves, installed in the first and second brake lines, respectively, for controlling the flow of the brake fluid so as to be proportional to the inputs from first and second braking control signals, respectively; a sensor for detecting operational and driving information of the construction machine; and a control part for outputting the first and second braking control signals in accordance with a braking operation signal of a driver, and independently controlling the first and second proportional flow control valves on the basis of the operational and driving information of the construction machine detected by the sensor.
A wheel slip control device for construction machinery is disclosed. The wheel slip control device for construction machinery according to the present invention comprises: a sensor unit for sensing the speed and torque of a motor which drives a wheel of a construction machine; a slip control unit for controlling the slip of the wheel through the speed and torque of the motor, sensed by the sensor unit; and an operation unit for operating the motor according to the torque set for the corresponding motor by the slip control unit.
B60W 10/08 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
A hydraulic system for increasing the operation speed of a construction machinery boom comprises: a boom cylinder for operating a construction machinery boom; a main control valve having a boom control spool for selectively supplying hydraulic oil, supplied from a hydraulic pump, to a boom head chamber and a boom rod chamber of the boom cylinder through a boom head hydraulic line and a boom rod hydraulic line; a regeneration device connected to the boom head chamber of the boom cylinder through a hydraulic regeneration line, so as to regenerate energy in the boom cylinder; and a regeneration valve unit installed in the hydraulic regeneration line and having a flow control valve for controlling the flow rate of the hydraulic oil flowing through the hydraulic regeneration line, wherein energy stored in the regeneration device during lowering of the boom is supplied directly to the boom cylinder via the flow control valve when the boom is raised.
A system for recirculating exhaust gas of an engine comprises: an intake line connected to an engine so as to supply intake air; an exhaust line connected to the engine so as to discharge, to the outside, a portion of exhaust gas discharged from the engine; a turbo charger having a turbine provided at the exhaust line and a compressor provided at the intake line; a post-treatment device provided at the exhaust line at the lower side of the turbine so as to post-treat the exhaust gas; a low-pressure EGR device for recirculating, to the engine, a portion of the exhaust gas discharged through the post-treatment device at the lower side of the post-treatment device; and an exhaust gas bypass device connected to the engine so as to supply, without passing through the turbine, the other portion of the exhaust gas, which is discharged from the engine, through a bypass line to the post-treatment device.
F02M 26/06 - Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
F02M 26/05 - High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
F02M 26/42 - Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passagesEGR systems specially adapted for engines having two or more cylinders
F02M 26/61 - Systems for actuating EGR valves using positive pressure actuatorsCheck valves therefor in response to exhaust pressure
49.
METHOD AND APPARATUS FOR CONTROLLING TRAVEL SPEED OF CONSTRUCTION MACHINE
An apparatus for controlling a travel speed of a construction machine comprises: first and second hydraulic pumps for supplying hydraulic oil to first and second travel motors, respectively; first and second sensors which are installed at discharge lines of the first and second hydraulic pumps, respectively, and are for detecting first and second pump pressures acting, respectively, on the first and second travel motors; at least one travel speed control valve which is switched on and off according to a travel speed control signal so as to control swivel angles of swash plates of each of the first and second travel motors; and a travel speed control unit for comparing a difference value between the first and second hydraulic pumps with a predetermined value and then outputting, to the travel speed control valve, the travel speed control signal so as to reduce the revolutions-per-minute of the first and second travel motors, if the difference value is equal to or greater than the predetermined value.
An embodiment of the present invention relates to a construction machine, the construction machine comprising: a main pump; a pivoting motor operated by receiving operating oil from the main pump; a pivoting valve for controlling the flow of the operating oil by the main pump so as to supply the operating oil to the pivoting motor; a discharge pressure detection unit for detecting a pressure of the operating oil discharged from the pivoting motor; an operating oil control valve unit for controlling the flow of the operating oil in accordance with the pressure of the operating oil discharged from the pivoting motor or supplied to the pivoting motor; a first accumulator capable of storing the operating oil that has passed through the operating oil control valve unit; and a flow rate amplifying unit installed between the operating oil control valve unit and the first accumulator, wherein the operating oil discharged from the pivoting motor is stored in the first accumulator through the flow rate amplifying unit.
An embodiment of the present invention relates to a construction machine comprising: a swing motor operated by a working fluid supplied from a main pump; a swing valve for controlling the flow of the working fluid pumped by the main pump, so as to supply the working fluid to the swing motor, and controlling the flow of the working fluid discharged from the swing motor; a working fluid control valve unit disposed between the swing motor and the swing valve so as to control the flow of the working fluid depending on the pressures of the working fluid at both ends thereof; a first accumulator for storing the working fluid having passed through the working fluid control valve unit when the swing motor is decelerated; and a regeneration control valve disposed between the working fluid control valve unit and the first accumulator.
A hydraulic system of construction machinery according to an embodiment of the present invention comprises: a boom cylinder; a first boom hydraulic line; a second boom hydraulic line; a regenerative line; a circulation line; an accumulator; a boom regenerative valve; and a control unit, wherein the hydraulic system of construction machinery can improve fuel efficiency by recovering the potential energy of a boom when the boom descends, while uniformly controlling the speed of the boom as intended by an operator.
F15B 11/024 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
F15B 1/02 - Installations or systems with accumulators
53.
CONSTRUCTION EQUIPMENT CONTROL DEVICE AND CONSTRUCTION EQUIPMENT CONTROL METHOD
A construction equipment control device comprises: a boom position detection unit for detecting the position of a boom; a load weight detection unit for detecting the weight of a load; a vehicle control device for determining an engine RPM increase value by receiving information on the position of the boom and the weight of the load in a transmission cutoff operation mode state, and for outputting an engine RPM control signal including the determined engine RPM increase value; and an engine control unit connected with the vehicle control device such that the engine RPM control signal can be received, and controlling the number of revolutions of an engine by using the determined engine RPM increase value.
A system for controlling a construction machine comprises: a hydraulic pump; at least one control valve provided at a center bypass line connected to the hydraulic pump, and controlling the flow direction of hydraulic oil discharged from the hydraulic pump so as to selectively supply the oil to an actuator; a bypass control valve, provided at the lower side of the control valve on the center bypass line, for variably controlling the flow rate of the hydraulic oil discharged to a drain tank through the center bypass line; and a control unit for controlling the operations of the hydraulic pump and the bypass control valve according to an operation signal of an operator, and opening the bypass control valve when the pump peak is generated so as to reduce a pump peak.
A cabin assembly for construction equipment is disclosed. A cabin assembly for construction equipment according to an embodiment of the present invention comprises: a main frame; a mount which is mounted on the main frame; a cabin which is fixed to the main frame by means of the mount while being spaced a predetermined distance apart therefrom; a retainer for connecting the cabin to the main frame and fixing the cabin to the main frame such that the cabin cannot be inclined at a first angle or greater with respect to the main frame; and a support which is installed on one of the main frame and the lower surface of the cabin, has an end opposite to the other of the main frame and the lower surface of the cabin while being spaced apart therefrom, and when the cabin is inclined at a second angle or greater with respect to the main frame, comes into contact with the other of the main frame and the lower surface of the cabin so as to support the cabin.
A dozer control method of a construction machine comprising a dozer enables: deriving the position of a dozer by analyzing an around view monitor (AVM) image; when the position of the dozer corresponds to the front, configuring a target dozer height on the basis of dozer leveling mode information; and controlling the height of the dozer so that same reaches the target dozer height.
A screen display system of construction equipment comprises: a plurality of cameras for generating image data; an AVM control unit for generating AVM image data on the basis of the camera image data, and selecting at least one among the AVM image data and the camera image data as first image data on the basis of a first failure flag; an additional information synthesizing unit for outputting second image data generated on the basis of the first image data; and a main display unit for displaying an image corresponding to one among the first image data and the second image data on the basis of a second failure flag for indicating the failure or not of the additional information synthesizing unit.
A construction machine safety apparatus controlling method according to an embodiment of the present specification comprises the steps of: applying power to a construction machine when a key switch operation is input by a worker; receiving operation signals of a parking switch, an FNR switch, and a pilot cut-off switch; determining whether operation states of the parking switch, the FNR switch, and the pilot cut-off switch satisfy a pre-configured condition; and controlling the construction machine to be able to start when the pre-configured condition is satisfied, wherein the pre-configured condition may correspond to a state in which the parking switch is operated to be turned on to operate a parking brake, the FNR switch is operated to be selected into neutral to allow a driving direction of the construction machine to be in a neutral state, and the pilot cut-off switch is operated to be turned on to allow the construction machine to be in a pilot cut-off state.
An embodiment of the present invention relates to a quick-clamp control apparatus of a construction machine that includes a clamp for mounting an attachment of a construction machine, and is characterised by comprising: a selection input unit for generating a selection signal during an "on" operation by a driver; an operation input unit for generating an operation signal during driver operation; a clamp driving and fastening unit for loosening and fastening the clamp; and a control unit for controlling the clamp unit so that the driving of the clamp is loosened when the operation signal is input after the selection signal has been input.
An adapter for a roller tappet of an engine may comprise a body part and a support part. The body part may be coupled to a cylinder block of the engine. The body part may comprise an oil inflow hole through which oil is introduced, the oil inflow hole communicating with a main gallery of the cylinder block. The support part may extend from one end of the body part to support the roller tappet. The support part may have a first oil passage communicating with the oil inflow hole. The first oil passage is formed to pass through the body part and the support part to allow the oil having been introduced through the oil inflow hole to be supplied to the roller tappet therethrough. Therefore, oil is supplied to the roller tappet via the oil passage from the main gallery, and thus it may not be necessary to form a separate oil passage for supplying oil from the cylinder block to the roller tappet.
A tappet of an engine may comprise a tappet head and a tappet rod. The tappet head may contact a cam of the engine. The tappet rod may extend from the tappet head and move up and down while rotating using a rotation force of the cam. The tappet rod may have a groove formed on the outer circumferential surface thereof. The groove formed on the circumferential surface of the tappet rod may reduce the weight of the tappet. Therefore, a spring of a valve train can have a low rigidity given thereto, thus reducing friction of the valve train. Further, the groove plays a role of reducing a contact area between the tappet rod and an inner surface of a tappet groove on a cylinder block, thus reducing friction between the tappet rod and the inner surface of the tappet groove. Consequently, the rotational mobility of the tappet can be enhanced, thereby improving lubricity between the tappet and the cam.
According to an embodiment of the present invention, a construction machine comprises: one or more hydraulic pumps for discharging working fluid; an engine for supplying rotating power to the hydraulic pumps; a hydraulic line in which the working fluid discharged by the hydraulic pumps flows; a main control valve provided on the hydraulic line and controlling the supply of the working fluid to a traveling device or one or more among various working devices, which need the working fluid; a bypass cut valve provided on the hydraulic line at the lower side thereof than the main control valve so as to open and close the hydraulic line; an automatic warm-up switch for generating a warm-up operation signal for increasing the temperature of the working fluid before an operation starts; and a control device for performing, when the warm-up operation signal is transmitted from the automatic warm-up switch, a warm-up operation for increasing the number of revolution of the engine and opening the bypass cut valve so as to increase the flow rate of the fluid moving along the hydraulic line.
A construction machine part comprises: a body including a low alloy cast steel; and a wear-resistant tip which is cast and connected to one end of the body and comprises a white cast iron. The construction machine part comprises different kinds of materials and has improved economic feasibility and wear resistance.
E02F 9/28 - Small metalwork for digging elements, e.g. teeth
B22D 19/06 - Casting in, on, or around, objects which form part of the product for manufacturing or repairing tools
B22D 19/16 - Casting in, on, or around, objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
C22C 37/08 - Cast-iron alloys containing chromium with nickel
C22C 37/10 - Cast-iron alloys containing aluminium or silicon
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
An exhaust gas post-processing system according to an embodiment of the present invention comprises: an exhaust flow path for moving an exhaust gas having been discharged from an engine; at least one post-processing device installed on the exhaust flow path to purify the exhaust gas; a burner installed on the exhaust flow path to heat the exhaust gas at an upstream of the at least one post-processing device; a fuel supply part for supplying a fuel to the burner; and an air supply flow path for supplying air to the burner. Further, the air supply flow path supplies, as the air, a part of the exhaust gas having been discharged from the engine to the burner.
F01N 3/025 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
F01N 3/035 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
F01N 3/023 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
65.
SYSTEM FOR CONTROLLING CONSTRUCTION MACHINERY AND METHOD FOR CONTROLLING CONSTRUCTION MACHINERY
A system for controlling construction machinery comprises: a hydraulic pump; first and second actuators respectively connected to the hydraulic pump through first and second parallel lines; first and second control valves for respectively controlling operations of the first and second actuators according to the displacement of spools provided therein; first and second spool displacement adjustment valves for supplying, to each of the spools, pilot signal pressures for controlling displacement of the spools in the first and second control valves, according to an inputted control signal; and a control valve control unit for outputting the control signal to the first and second spool displacement adjustment valves according to an operation signal of a worker, limiting a maximum allowable value of an operation signal for the first actuator to a value selected by the worker when an operation signal for a combined operation of the first and second actuators is received, and performing adjustment such that a spool displacement of the second control valve is limited according to the limited operation signal for the first actuator.
A system for controlling a construction machine comprises: a hydraulic pump; a first and a second actuator connected to the hydraulic pump through a first and a second parallel line, respectively; a first and a second control valve for controlling operations of the first and the second actuator, respectively, depending on the displacement amount of spools provided therein; a first and a second spool displacement adjusting valve for supplying respective spools of the first and the second control valve with a pilot signal pressure for controlling a displacement amount of the spools depending on an input control signal; and a control unit for outputting the control signal to the first and the second spool displacement adjusting valve in response to a manipulation signal of an operator and performing a control such that, when a manipulation signal for a complex operation of the first and the second actuator is received, the displacement amount of the spool in the second control valve according to a manipulation signal for the second actuator is limited depending on a manipulation signal of the first actuator.
The present specification relates to a system and a method for preventing overheating of an axle in a construction machine, and a system for preventing overheating of an axle in a construction machine, according to one embodiment of the present specification, prevents overheating of an axle loaded in the construction machine so as to transmit driving force of an engine to wheels, and comprises: a brake pedal; a brake sensor for detecting displacement of the brake pedal when the brake pedal is operated by a driver; an exhaust brake loaded in the engine so as to control a degree of opening of an exhaust gas discharge path of the engine when driven; and a control unit for controlling the exhaust brake in correspondence to the displacement of the brake pedal so as to adjust a degree of opening of the exhaust gas discharge path, when an operation of the brake pedal is detected from the brake sensor.
The present invention relates to a safety system for a construction machine. A safety system for a construction machine according to an embodiment of the present invention comprises: a pilot pump for supplying a pilot hydraulic oil; a plurality of spools each of which is operated by the pilot hydraulic oil to control the supply of a main hydraulic oil and has a signal portion formed in one area thereof; a signal line that sequentially connects the pilot pump with the signal portion of the plurality of spools and discharges, into a hydraulic tank, the pilot hydraulic oil which the pilot pump has supplied; and a pressure sensor for measuring the pressure of the signal line.
An embodiment of the present invention relates to a display system. The display system comprises: a plurality of photographing devices installed in a construction machine to be spaced apart from each other, and generating photographed images by photographing areas outside the construction machine in a manner in which the photographed areas partially overlap each other; a detecting device for detecting the existence of a person or an object located in overlapping areas, which are overlappingly photographed by the plurality of photographing devices; a display device installed inside the construction machine to output images photographed by the plurality of photographing devices; and a control device for combining images photographed by the plurality of photographing devices, converting the combined image to an image having a viewpoint in which the construction machine is viewed from the top, and selectively outputting a photographed image in which a corresponding overlapping area is captured to the display device on the basis of the result of the detection by the detecting device.
B60R 1/08 - Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots
B60R 21/0134 - Electrical circuits for triggering safety arrangements in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to imminent contact with an obstacle
70.
METHOD FOR CONTROLLING MIRRORING OF CONSTRUCTION MACHINE, AND MIRRORING SYSTEM
A method for controlling mirroring of a construction machine executes a mirroring application of a mobile communication terminal so as to receive driving and operation state information of the construction machine from an infotainment terminal for the construction machine. The present invention determines whether an application currently being executed in the mobile communication terminal corresponds to an approved application suitable for driving regulations or operation regulations. Information indicating the approved application is transmitted from the mobile communication terminal to the infotainment terminal such that mirroring can be performed on the infotainment terminal.
G06F 11/20 - Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
G06F 21/53 - Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems during program execution, e.g. stack integrity, buffer overflow or preventing unwanted data erasure by executing in a restricted environment, e.g. sandbox or secure virtual machine
G06F 9/44 - Arrangements for executing specific programs
A device for reducing impacts during traveling of a construction machine comprises: a traveling manipulation unit that generates a pilot pressure for controlling the amount of operating oil discharged from a hydraulic pump, which supplies the operating oil to a traveling motor of the construction machine; a sensor unit for detecting the amount of change in manipulation by the traveling manipulation unit; a pressure-reducing valve installed between the traveling manipulation unit and the hydraulic pump so as to control the pilot pressure supplied to the hydraulic pump; and a control unit that receives information regarding the amount of change in manipulation from the sensor unit and, when the amount of change in manipulation is equal to or larger than a preset amount, controls the operation of the pressure-reducing valve such that the pilot pressure increases gradually.
A hydraulic control device for a construction machine comprises: an accumulator which stores high-pressure hydraulic fluid discharged from a boom cylinder for operating a boom of a construction machine; a hydraulic motor which is connected to the accumulator and is driven by the high-pressure hydraulic fluid; a pressure sensor for measuring the pressure of the accumulator; and a control unit which is connected to the accumulator and the hydraulic motor so as to control the operations thereof, and has a determining unit for determining the failure or not of the hydraulic motor by receiving the pressure value of the accumulator and the number of rotations of the hydraulic motor when the compressed hydraulic fluid is supplied to the hydraulic motor from the accumulator.
A hydraulic system for a construction machine comprises: a boom cylinder for operating a boom of a construction machine; a main control valve which has a boom control spool for selectively supplying a hydraulic fluid supplied from a hydraulic pump to a boom head chamber and a boom rod chamber of the boom cylinder through a boom head hydraulic line and a boom rod hydraulic line; a regenerating device which is connected to the boom head chamber of the boom cylinder by means of a hydraulic regeneration line, and is for regenerating energy of the boom cylinder; a regeneration valve unit which is installed on the hydraulic regeneration line, and has a discharge amount control valve for controlling the flow of the hydraulic fluid flowing through the hydraulic regeneration line; and a control unit which is connected to the main control valve and the regeneration valve unit so as to control the operations thereof, and controls so that in a boom down low-speed mode, the boom is slowed to a first speed by discharging the hydraulic fluid by means of the regenerating device, and in a boom down high-speed mode, the boom is slowed to a second speed that is greater than the first speed by discharging the hydraulic fluid by means of the regenerating device and the main control valve.
The present invention relates to a selective catalytic reduction reactor for reducing nitrogen oxides contained in exhaust gas. A selective catalytic reduction reactor according to an embodiment of the present invention comprises: a reactor main body having an inflow tube formed on the front end thereof and a discharge tube formed on the rear end thereof; a hollow cylindrical decomposition chamber having the top surface open and communicating with the inflow tube of the reactor main body, having the bottom surface closed, and having a plurality of through holes formed in one region of the side surface thereof; a circular guide plate installed in the decomposition chamber separated from the side surface of the decomposition chamber by a separating space; and a reducing agent spraying part for spraying a reducing agent at exhaust gas entering through the inflow tube of the reactor main body.
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
F01N 13/08 - Other arrangements or adaptations of exhaust conduits
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
75.
IMPACTOR-TYPE BREATHER OF ENGINE AND ENGINE HAVING IMPACTOR-TYPE BREATHER
Disclosed is an impactor-type breather for separating engine oil from blow-by gas flowing into a crank case of an engine. The impactor-type breather according to an embodiment of the present invention comprises: a gas inflow part into which the blow-by gas flows; a nozzle part having a nozzle hole through which the blow-by gas, having flowed in through the gas inflow part, passes; a collision part with which the blow-by gas, having passed through the nozzle hole, collides; a gas discharge part through which the blow-by gas, having passed through the nozzle hole, is discharged; and a regulating means for regulating the total opening area of the nozzle hole in correspondence to the pressure of the blow-by gas.
F01M 13/04 - Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
F16K 3/02 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing facesPackings therefor
F16K 3/314 - Forms or constructions of slidesAttachment of the slide to the spindle
F16K 31/126 - Operating meansReleasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
A cooling device for a reductant spray module comprises: the reductant spray module provided at an exhaust pipe so as to spray a reductant into the exhaust pipe, and cooled by a coolant supplied through a module cooling channel formed thereinside; a coolant pump for supplying the coolant to the module cooling channel; a coolant circulation line comprising a coolant supply line and a coolant collection line, which connect the coolant pump and the module cooling channel; and a coolant collection unit provided on the coolant collection line connecting the coolant pump and the module cooling channel so as to store the coolant circulated through the reductant spray module, and provided at a higher location, in the direction of gravity, than the reductant spray module. The coolant collection unit has a steam outlet connected to an upper part of the coolant collection unit in the direction of gravity so as to discharge, to the outside, coolant in a steam state inside the coolant collection unit.
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
F01N 13/08 - Other arrangements or adaptations of exhaust conduits
F01P 3/12 - Arrangements for cooling other engine or machine parts
77.
EXHAUST GAS PURIFYING SYSTEM AND METHOD FOR MONITORING SAME
An exhaust gas purifying system comprises: a reduction agent injecting module installed on a housing to inject a reduction agent into the housing, the housing capable of being mounted on an exhaust pipe through which exhaust gas from an engine is discharged; a selective catalyst reduction device installed behind the reduction agent injecting module within the housing to react nitrogen oxides in the exhaust gas with the reduction agent, which is injected by the reduction agent injecting module, to reduce the nitrogen oxides; a differential pressure sensor for measuring a pressure difference between the internal pressure of the housing in front of the selective catalyst reduction device and the internal pressure of the housing behind the selective catalyst reduction device; and a control device that receives pressure information from the differential pressure sensor and outputs a first warning signal when the received pressure is equal to or lower than a preset pressure.
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
F01N 11/00 - Monitoring or diagnostic devices for exhaust-gas treatment apparatus
F01N 9/00 - Electrical control of exhaust gas treating apparatus
G01L 13/00 - Devices or apparatus for measuring differences of two or more fluid pressure values
G01F 1/34 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
78.
CONSTRUCTION MACHINE AND METHOD FOR CONTROLLING CONSTRUCTION MACHINE
Disclosed are: a construction machine such as an excavator having a hydraulic system; and a method for controlling the construction machine. The construction machine comprises: a hydraulic pump driven by a driving source, so as to supply working fluid; an actuator operated by receiving the working fluid from the hydraulic pump; a spool for controlling the flow of the working fluid supplied from the hydraulic pump to the actuator; an operation unit for controlling the operation of the actuator; a memory unit for storing at least two operation speed profiles of the actuator; an operation speed selection unit for selecting any one of the least two operation speed profiles stored in the memory unit; and a control unit for controlling a discharge flow of the hydraulic pump on the basis of the operation speed profile selected through the operation speed selection unit.
Construction machinery and a method of controlling construction machinery are disclosed. The construction machinery comprises: a first pump and a second pump; an engine providing usable torque to the first pump and the second pump; a first joystick and a second joystick for controlling an actuator driven by hydraulic fluid discharged from the first pump and the second pump; a joystick manipulation amount acquisition unit for acquiring the manipulated amounts of the first joystick and the second joystick; and a control unit for adjusting the torque distribution ratio for the first pump and the second pump according to the manipulated amounts of the first joystick and the second joystick, when the sum of the required torque for the first pump and the required torque for the second pump is greater than the usable torque.
The present invention relates to an apparatus and a method for controlling a construction machine. An apparatus for controlling a construction machine according to an embodiment of the present invention is capable of controlling an engine by a method that is expected to lead to more efficient fuel consumption by comparing, on the basis of a fuel efficiency map, fuel efficiency expected in the case of reducing engine RPM with fuel efficiency expected in the case of selecting a torque diagram corresponding to the condition where auxiliary power is provided, from among a plurality of torque diagrams included in the fuel efficiency map, and applying the same.
F02D 35/00 - Non-electrical control of engines, dependent on conditions exterior or interior to engines, not otherwise provided for
81.
CONSTRUCTION MACHINE DATA PROCESSING METHOD, DEVICE FOR PERFORMING SAME, CONSTRUCTION MACHINE DATA PROCESSING SERVER, AND CONSTRUCTION MACHINE DATA PROCESSING UNIT
According to a construction machine data processing method, a set file can be generated from construction machine master data stored in a server. The set file is transmitted to the construction machine such that the server and the construction machine can share the set file. New data of the construction machine can be selectively collected by using the set file. The collected data can be transmitted to the server. Therefore, the server and a data processing unit share the set file generated from the construction machine master data, such that one type of data collection unit and software can be commonly applied to all construction machines.
G06F 15/16 - Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
G06F 17/30 - Information retrieval; Database structures therefor
The present invention relates to a cylinder head. A cylinder head according to embodiments of the present invention includes a groove formed in the perimeter of a valve bridge which is the region between an intake valve seat and an exhaust valve seat. By virtue of the groove, stress applied to a cylinder head due to heat and pressure generated by fuel combustion can be absorbed. Accordingly, deformation of the valve bridge and damage as a result can be minimized.
The present invention relates to a control device and a control method for a construction machine. The control device and the control method for a construction machine, according to an embodiment of the present invention, can determine the necessity of operating an alternator by taking into consideration the required electrical energy and the current charged amount of a battery, when auxiliary power is received from an auxiliary power device, thereby lowering engine RPM when power generation is unnecessary.
A hydraulic system of a construction machine comprises: a regeneration valve unit; a first check valve; and a control unit. The regeneration valve unit comprises: a first opening and closing valve, installed in a first flow path, for opening and closing the first flow path, wherein the first flow path connects a drain tank to a head-side chamber of a boom cylinder which has the head-side chamber on the side of a cylinder head and a rod-side chamber on the side of a cylinder rod; and a second opening and closing valve, installed in a second flow path which diverges from the first flow path and is connected to the rod-side chamber, for opening and closing the second flow path. The first check valve is installed in the second flow path between the rod-side chamber and the regeneration valve unit, and selectively discharges, to the drain tank, hydraulic oil discharged from the rod-side chamber. The control unit controls the opening and closing of the first opening and closing valve, the second opening and closing valve and the first check valve according to control modes.
The present invention relates to a device and method for controlling a hydraulic pump for a construction machine, such as an excavator. The device for controlling a hydraulic pump for a construction machine according to the present invention comprises: an operation unit operated by a user; a hydraulic pump; an engine for providing a driving force to the hydraulic pump; an operation mode selecting unit for controlling an output of the engine; an auxiliary power source connected to the engine to assist the driving force; and a control unit for adding a torque of the auxiliary power source to a torque of the engine so as to calculate an available torque and controlling a pump torque of the hydraulic pump on the basis of the available torque.
The present invention relates to the control of the opening degree of an EGR valve provided in an engine using compressed natural gas as fuel. A method for controlling an EGR valve of an engine, according to the present invention, comprises the steps of: calculating an amount of exhaust gas, which is sent from an exhaust line to an intake line, according to engine operation conditions; regulating the opening degree of the EGR valve according to the calculated amount of the exhaust gas; measuring the temperature of the exhaust gas discharged from a combustion chamber; and increasing the opening degree of the EGR valve by a preset increment if the temperature of the exhaust gas, which is discharged from the combustion chamber, exceeds a preset reference temperature.
F02D 21/08 - Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion-air the other gas being the exhaust gas of engine
F02D 41/00 - Electrical control of supply of combustible mixture or its constituents
F02M 21/02 - Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
87.
POWER APPARATUS INCLUDING REDUCING AGENT SUPPLY CONTROL SYSTEM AND REDUCING AGENT SUPPLY CONTROL METHOD
A power apparatus including a reducing agent supply control system according to an embodiment of the present invention comprises: an engine for combusting air and fuel with a predetermined air-fuel ratio and discharging exhaust gas containing nitrogen oxides; an exhaust flow path along which the exhaust gas discharged from the engine moves; a pressure sensor for measuring the actual pressure of air supplied to the engine; a nitrogen oxide concentration sensor which is installed on the exhaust flow path so as to measure the concentration of nitrogen oxides in the exhaust gas; a reducing agent supply unit for supplying a reducing agent to the exhaust gas which moves along the exhaust flow path; and a control unit for determining the quantity of the reducing agent on the basis of information received from the pressure sensor and the nitrogen oxide concentration sensor, so as to control the reducing agent supply unit.
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
F02B 37/00 - Engines characterised by provision of pumps driven at least for part of the time by exhaust
One embodiment of the present invention relates to a construction machine starting assist system comprising: a construction machine engine; an input unit for receiving a key-on signal and a key-off signal of the engine; a hydraulic pump driven by the engine; an actuator driven by the hydraulic oil discharged from the hydraulic pump; a regeneration valve for transferring a part or all of the hydraulic oil returned from the actuator and a part or all of the hydraulic oil discharged from the hydraulic pump so as to supply the same for regeneration; an accumulator charged with the hydraulic oil supplied from the regeneration valve; a charging valve controlled such that flow is discharged from the accumulator when the key-on signal is inputted into the input unit; and a hydraulic motor driven by the hydraulic oil discharged by the charging valve, wherein the hydraulic motor is connected to the engine so as to assist the starting of the engine.
F02D 29/04 - Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps
F02N 9/00 - Starting of engines by supplying auxiliary pressure fluid to their working chambers
A control system for a construction machine may comprise: a main control valve having electro proportional pressure reducing valves of a first group for outputting a secondary pressure proportional to an external pressure command signal to a first spool installed in a fluid channel among a hydraulic pump and actuators to control an operation of an actuator of the first group among the actuators, and electro proportional pressure reducing valves of a second group for outputting a secondary pressure proportional to an external pressure command signal to a second spool for controlling an operation of an actuator of the second group among the actuators; first pressure sensors for detecting the secondary pressure output from the electro proportional pressure reducing valves of the first group, and second pressure sensors for detecting the secondary pressure output from the electro proportional pressure reducing valves of the second group; and a control unit for supplying the pressure command signals to the electro proportional pressure reducing valves according to an operation signal of the construction machine, respectively, and comparing the secondary pressure detected by the first and second pressure sensors with the pressure command signals to determine whether a failure in the electro proportional pressure reducing valves has occurred.
An excavator tool attaching mechanism includes a housing having a pair of housing walls; a fixed engagement member for engaging with a first coupling pin of an excavator tool; a moveable engagement mechanism for engaging with a second coupling pin of the excavator tool; and a safety mechanism moveable between a locked and an unlocked configuration. The moveable engagement mechanism includes an engaging element moveable between a first position for releasing the excavator tool and a second position for engagement with the second coupling pin. The safety mechanism is automatically moved from the unlocked to the locked configuration by movement of the engaging element from the first to the second position, preventing movement of the engaging element between the second and first position. The engaging element is moveable to the second position when the moveable engagement mechanism engages with the second coupling pin.
According to an automatic gear shifting method for a construction machine, the traveling speed of the construction machine can be detected. An input shaft speed and an output shaft speed of a transmission of the construction machine can be synchronized according to the detected traveling speed. The transmission can be shifted. Therefore, the transmission can be automatically shifted from a low gear to a high gear according to the traveling speed of the construction machine, and vice versa, and thus the fuel efficiency of the construction machine and convenience for an operator can be improved.
The present invention relates to an apparatus and method for controlling an EGR valve. The apparatus for controlling an EGR valve according to the present invention comprises: a measurement unit for measuring at least one operation condition of an engine system; a fresh air quantity setting unit for setting a target fresh air quantity on the basis of the operation condition; a fresh air quantity sensor for measuring a current fresh air quantity introduced through an intake line; a control calculation unit for outputting a signal which controls the opening of the EGR valve such that the current fresh air quantity follows the target fresh air quantity; and an identification unit for simulating an input-output of the engine system and outputting an engine system input-output sensitivity which is the ratio of the rate of a change in the current fresh air quantity to the rate of a change in the opening of the EGR valve, wherein at least one gain for use in the control calculation unit is divided according to the engine system input-output sensitivity.
F02D 21/08 - Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion-air the other gas being the exhaust gas of engine
The present invention relates to spheroidal graphite cast iron, a manufacturing method therefor, and a hydraulic device component manufactured therefrom. The present invention can provide the spheroidal graphite cast iron having uniform spheroidal graphite and matrixes by specifically controlling the ratio (Cu/Zr) of the copper (Cu) content to the zirconium (Zr) content.
A selective catalytic reduction system comprises: a reductant injection module provided at an exhaust pipe in which an exhaust gas is discharged from an engine, and injecting the reductant into the exhaust pipe; a temperature calculation unit for calculating the temperature of an injection nozzle of the reductant injection module by using temperature-related information of the reductant injection module; and a temperature control unit for controlling the injection amount of the reductant in the reductant injection module such that the injection amount is increased when the calculated temperature of the injection nozzle exceeds the allowable temperature during the operation of the engine.
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
F01N 3/36 - Arrangements for supply of additional fuel
F01N 9/00 - Electrical control of exhaust gas treating apparatus
A connecting rod bearing for a crank shaft includes an upper portion bearing shell having a semi-cylindrical shape and a lower portion bearing shell having a semi-cylindrical shape and rotatably supporting the crank pin together with the upper portion bearing shell, wherein grooves are formed on inner surfaces of both side edges of the lower portion bearing shell, respectively.
A urea concentration measurement device comprises: a concentration measurer for measuring the urea concentration by detecting waves transmitted through urea water, which is in a concentration measurement area between a transmitter and a receiver; and a shielding member arranged so as to encompass the concentration measurement area. The shielding member has: a plurality of through-holes capable of preventing bubbles within the urea water from infiltrating into the concentration measurement area; and at least one air discharge hole for discharging the bubbles inside the concentration measurement area to the outside.
F01N 11/00 - Monitoring or diagnostic devices for exhaust-gas treatment apparatus
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
F01N 3/36 - Arrangements for supply of additional fuel
The present invention relates to a transmission control system of a wheel loader and a control method thereof. The present invention comprises: a vehicle control unit to which an on-signal of a brake pedal provided in a wheel loader is inputted; a transmission control unit connected to the vehicle control unit; and a transmission which is controlled by the transmission control unit. Here, the transmission may comprise: an input shaft which provides power generated by an engine provided in the wheel loader; an output shaft which receives and outputs an output supplied from the input shaft; and a second power transmission part which fluidically transmits the power supplied from the input shaft to the output shaft. The transmission control unit can control the second power transmission part of the transmission in response to the on-signal of the brake pedal and the vehicle speed of the wheel loader.
The present invention relates to an apparatus for controlling the hydraulic circuit of construction equipment. The apparatus for controlling the hydraulic circuit of construction equipment according to one embodiment of the present invention is configured such that when travelling and working are required at the same time, the flux of a first pump can be provided early to a front working apparatus, thereby advancing the time of actually initiating the operation of the front working apparatus. In addition, the apparatus for controlling the hydraulic circuit of construction equipment according to the embodiment of the present invention allows the spool of a control valve (20) to be controlled according to a control map and thus can mitigate an impact caused by a reduction in travel speed.
An engine control device comprises: a reducing agent concentration sensor for measuring the concentration of a reducing agent, which is supplied to a reducing agent ejection module installed on an engine exhaust tube; and a control unit for conducting a control for changing the engine combustion condition, when the measured concentration of the reducing agent is equal to or less than a reference concentration, such that the amount of nitrogen oxide discharged from the engine becomes less than the amount of current discharge.
F02D 43/00 - Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
F02D 21/08 - Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion-air the other gas being the exhaust gas of engine
F02D 41/22 - Safety or indicating devices for abnormal conditions
In an exhaust gas processing system comprising an oxidation catalyst device and a selective catalyst reduction device which are sequentially installed in an exhaust pipe through which exhaust gas from an internal combustion engine is exhausted, a device for purifying exhaust gas comprises: at least one carrier through which exhaust gas passes, the at least one carrier being installable on at least one of the position ahead of the oxidation catalyst device and the position between the oxidation catalyst device and the selective catalyst reduction device; and a wash coat, which coats the surface of the carrier, for collecting impurities included in the exhaust gas or oxidative material deviated from the oxidation catalyst device.
F01N 3/04 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of liquids
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/00 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group
