A dual drive driveline for a vehicle has a power source, a hydrostatic pump drivingly engaged with the power source, a first axle, a second axle, and a first hydrostatic unit in fluid communication with the hydrostatic pump. The first hydrostatic unit is drivingly engaged or selectively drivingly engaged with the first axle, and the first hydrostatic unit is not drivingly engageable with the second axle. A second hydrostatic unit in fluid communication with the hydrostatic pump, the second hydrostatic unit being drivingly engaged or selectively drivingly engaged with the second axle, and the second hydrostatic unit not being drivingly engageable with the first axle. A control unit is adapted to control a hydraulic displacement of at least one of the hydrostatic pump, the first hydrostatic unit and the second hydrostatic unit.
B60K 17/356 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
B60K 17/10 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
F16H 61/4096 - Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
F16H 61/444 - Control of exclusively fluid gearing hydrostatic with more than one pump or motor unit in operation by changing the number of pump or motor units in operation
F16H 47/02 - Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
A rotary seal arrangement for use with a central tire inflation system is provided. The rotary seal arrangement comprises a stationary portion, a rotating portion, a first sealing ring, a second sealing ring, and a first bushing portion. The stationary portion defines a first air passage therethrough and the rotating portion defines a second air passage therethrough. The first sealing ring and the second sealing ring are each disposed on one of the rotating portion and the stationary portion. The first bushing is disposed on one of the rotating portion and the stationary portion. The first bushing is in dynamic sealing engagement with the first sealing ring. The stationary portion, the rotating portion, the first sealing ring, and the second sealing ring form a sealed cavity that facilitates fluid communication between the first air passage and the second air passage.
F16J 15/34 - Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
B60C 23/00 - Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
F16L 27/08 - Adjustable joints; Joints allowing movement allowing adjustment or movement only about the axis of one pipe
3.
Controller for a series hydraulic hybrid transmission
A series hydraulic hybrid system for a vehicle and a method of operating the same is described. The series hydraulic hybrid system has a hydraulic circuit, high and low pressure hydraulic accumulators, and a control unit. The hydraulic circuit has first and second hydraulic displacement units in fluid communication. The first hydraulic displacement unit is drivingly engaged with an internal combustion engine. The high pressure hydraulic accumulator and the low pressure hydraulic accumulator are fluidly connected to the hydraulic circuit through at least one accumulator valve. The control unit is adapted to receive an input from an operator, compute a requested torque and a target system pressure based on the input, compare an accumulator pressure to the target system pressure, and control at least one of a speed of the internal combustion engine and a valve state of the accumulator valve based on the outcome of the comparison.
B60W 10/04 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
B60W 10/24 - Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
B60W 20/00 - Control systems specially adapted for hybrid vehicles
B60W 10/06 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
A series hydraulic hybrid driveline for a vehicle is described. The driveline has a power source, a hydraulic circuit having a first hydraulic displacement unit and a second hydraulic displacement unit, a hydraulic accumulator assembly with high pressure and low pressure hydraulic accumulators, at least one accumulator valve, at least one input device, and a control unit. The first hydraulic displacement unit is drivingly engaged with the power source. The accumulator assembly is selectively fluidly connected to the hydraulic circuit through the accumulator valve. The control unit is configured to compute a total power requested from the power source based on an input command from the input device, compare the computed total power to a threshold power, and control a valve state of the accumulator valve based upon the result of the comparison. A method of controlling the driveline is also described.
B60W 10/04 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
B60W 10/06 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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
B60W 10/24 - Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
B60W 20/00 - Control systems specially adapted for hybrid vehicles
A method of charging a hydro-pneumatic energy storage system is described. The system has a first hydro-pneumatic accumulator with a first hollow vessel. Disposed within the first hollow vessel is a first compressible volume containing a first amount of gas. The system has a second hydro-pneumatic accumulator with a second hollow vessel. Disposed within the second hollow vessel is a second compressible volume containing a second amount of gas. The gas contained in the first volume is pre-pressurized to a first hydrostatic pre-charge pressure and the gas contained in the second volume is pre-pressurized to a second hydrostatic pre-charge pressure. The second pre-charge pressure is higher than the first pre-charge pressure. In addition, the gas in the first volume is pressurized by discharging a non-compressible hydraulic fluid into the first vessel while keeping a quantity of non-compressible hydraulic fluid contained in the second vessel constant to keep the pressure of the gas contained in the second volume at the second pre-charge pressure.
A series hydraulic hybrid system for a vehicle is described. The system has a hydraulic circuit, a hydraulic working assembly, and a hydraulic accumulator assembly. The hydraulic circuit has a first hydraulic displacement unit in fluid communication with a second hydraulic displacement unit. The first hydraulic displacement unit is drivingly engaged with a power source. The hydraulic working assembly has a hydraulic implement and a hydraulic working pump in fluid communication with the hydraulic implement, the hydraulic working pump drivingly engaged with the power source. The hydraulic accumulator assembly has a high pressure hydraulic accumulator and a low pressure hydraulic accumulator. The hydraulic accumulator assembly selectively fluidly connects to the hydraulic circuit and the hydraulic accumulator assembly selectively fluidly connects to the hydraulic working assembly.
F16D 31/02 - Fluid couplings or clutches with pumping sets of the volumetric type, i.e. in the case of liquid passing a predetermined volume per revolution using pumps with pistons or plungers working in cylinders
F15B 11/17 - Servomotor systems without provision for follow-up action with two or more servomotors using two or more pumps
F15B 1/02 - Installations or systems with accumulators
F16H 61/4096 - Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
A series hydraulic hybrid system for a vehicle is described. The hydraulic hybrid system has a hydraulic circuit and a high pressure accumulator. The hydraulic circuit has a first hydraulic displacement unit in fluid communication with a second hydraulic displacement unit. The high pressure hydraulic accumulator is in fluid communication with the hydraulic circuit and a low pressure hydraulic accumulator in fluid communication with the hydraulic circuit. The high pressure hydraulic accumulator is in fluid communication with the hydraulic circuit through a proportional flow control valve. The proportional flow control valve is adapted to continuously vary a flow of hydraulic fluid between the high pressure hydraulic accumulator and the hydraulic circuit.
The invention relates to a dual motor hydraulic hybrid transmission. The transmission comprises a power source, a hydraulic circuit including a pump drivingly engaged with the power source and two displacement units, a hydraulic accumulator assembly including high and low pressure accumulators, one or more control valves, and an output shaft drivingly engaged with the first hydraulic displacement unit. The displacement units are in fluid communication with the hydraulic pump. The accumulators are in fluid communication with the hydraulic circuit. The second hydraulic displacement unit is drivingly engaged with the output shaft. The control valves are configured to selectively fluidly connect the hydraulic pump to the first hydraulic displacement unit while fluidly disconnecting the hydraulic pump from the second hydraulic displacement unit; and, simultaneously, fluidly connect the hydraulic accumulator assembly to the second hydraulic displacement unit while fluidly disconnecting the hydraulic accumulator assembly from first hydraulic displacement unit.
F16H 47/02 - Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
F16H 61/452 - Selectively controlling multiple pumps or motors, e.g. switching between series or parallel
F16H 61/4096 - Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
B60K 6/12 - Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
F16H 47/04 - Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type the mechanical gearing being of the type with members having orbital motion
9.
DUAL MOTOR DRIVE UNIT AND METHOD OF DRIVINGLY ENGAGING A FIRST MOTOR OF A DUAL MOTOR DRIVE UNIT WITH AN OUTPUT SHAFT
The invention relates to a method of drivingly engaging a first motor (4) of a dual motor drive unit (1; 100) with an output shaft (14) driven by a second motor (7) of the dual motor drive unit (1; 100), the method comprising the steps of: actuating a clutching device (9) for drivingly engaging the first motor (4) with the output shaft (14); synchronizing a rotational speed (32) of the first motor (4) with a rotational speed of the output shaft (14); when the rotational speed (32) of the first motor (4) and the rotational speed of the output shaft (14) are synchronized, reducing an output torque of the first motor (4); and when the clutching device (9) drivingly engages the first motor (4) with the output shaft (14), increasing the output torque of the first motor (4). The invention further relates to a dual motor drive unit (1; 100} for carrying out the method.
F16H 61/444 - Control of exclusively fluid gearing hydrostatic with more than one pump or motor unit in operation by changing the number of pump or motor units in operation
The invention relates to a dual drive driveline (201; 202; 203) for a vehicle (101; 102; 103), the driveline comprising: a power source (3); a hydrostatic pump (4) drivingly engaged with the power source (3); a first axle (11a); a second axle (lib); a first hydrostatic unit (5a) in fluid communication with the hydrostatic pump (4), the first hydrostatic unit (5a) being drivingly engaged or selectively drivingly engaged with the first axle (11a), and the first hydrostatic unit (5a) not being drivingly engageable with the second axle (lib); a second hydrostatic unit (5b) in fluid communication with the hydrostatic pump (4), the second hydrostatic unit (5b) being drivingly engaged or selectively drivingly engaged with the second axle (lib), and the second hydrostatic unit (5b) not being drivingly engageable with the first axle (11a); and a control unit (30), the control unit (30) being adapted to control a hydraulic displacement of at least one of the hydrostatic pump (4), the first hydrostatic unit (5a) and the second hydrostatic unit (5b). The invention further relates to a vehicle (101; 102; 103) including said dual drive driveline (201; 202; 203).
B60K 17/10 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
B60K 17/356 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
F16H 61/4096 - Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
F16H 61/444 - Control of exclusively fluid gearing hydrostatic with more than one pump or motor unit in operation by changing the number of pump or motor units in operation
A hydrostatic driveline and method of operating a hydrostatic driveline is provided. The hydrostatic driveline comprises a power source, hydrostatic pump, a hydrostatic motor, a direct drive link, a first transmission portion, and a second transmission portion. The direct drive link is in driving engagement with at least one of the power source and the hydrostatic pump. The first transmission portion is in driving engagement with a vehicle output and the hydrostatic motor. The second transmission portion is in driving engagement with the direct drive link and at least one of the vehicle output and the first transmission portion. The hydrostatic pump, the hydrostatic motor, and the first transmission portion form a first power path for the hydrostatic driveline and the direct drive link and the second transmission portion form a second power path for the hydrostatic driveline.
F16H 37/06 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts
F16H 47/02 - Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
B60K 17/10 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
B60K 17/356 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
A rotary seal arrangement for use with a central tire inflation system is provided. The rotary seal arrangement comprises a stationary portion, a rotating portion, a first sealing ring, a second sealing ring, and a first bushing portion. The stationary portion defines a first air passage therethrough and the rotating portion defines a second air passage therethrough. The first sealing ring and the second sealing ring are each disposed on one of the rotating portion and the stationary portion. The first bushing is disposed on one of the rotating portion and the stationary portion. The first bushing is in dynamic sealing engagement with the first sealing ring. The stationary portion, the rotating portion, the first sealing ring, and the second sealing ring form a sealed cavity that facilitates fluid communication between the first air passage and the second air passage.
B60C 23/00 - Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
A hydrostatic driveline is provided. The hydrostatic driveline comprises a power source, a hydrostatic pump, a hydrostatic motor, a direct drive link, and a transmission portion. The power source is drivingly engaged with an input member. The hydrostatic pump is in driving engagement with the input member. The hydrostatic motor is in fluid communication with the hydrostatic pump. The direct drive link is in driving engagement with the input member. The transmission portion is in driving engagement with a vehicle output and at least one of the hydrostatic motor and the direct drive link The transmission portion includes at least one engagement device and a drive ratio. The hydrostatic pump, the hydrostatic motor, and the transmission portion form a first power path for the hydrostatic driveline and the direct drive link forms a second power path for the hydrostatic driveline.
F16H 47/02 - Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
B60K 17/10 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
B60K 17/356 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
B60K 17/28 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of power take-off
The invention relates to a hydraulic hybrid powertrain (200; 1200; 2200; 3200; 4200; 5200) for a vehicle, comprising: an internal combustion engine (204) selectively drivingly engaged with an input of a stepped-ratio transmission (210) through a torque converter (206) and through a speed direction changing device (208), an output of the stepped-ratio transmission (210) being selectively drivingly engaged with a vehicle output (212); an intermediate gear set (226) drivingly engaged with the speed direction changing device (208) and drivingly engaged with the input of the stepped-ratio transmission (210); and a hydraulic machine (214) in fluid communication with a hydraulic accumulator assembly, a transmission shaft of the hydraulic machine (214) being drivingly engaged or selectively drivingly engaged with the intermediate gear set (226) for providing energy to the intermediate gear set (226) and for absorbing energy from the intermediate gear set (226). The invention further relates to methods of operating the hydraulic hybrid powertrain.
B60K 6/12 - Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
B60K 17/04 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
F16H 61/70 - Control functions within change-speed- or reversing-gearings for conveying rotary motion specially adapted for change-speed gearing in group arrangement, i.e. with separate change-speed gear trains arranged in series, e.g. range or overdrive-type gearing arrangements
F16H 3/00 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
15.
APPARATUS AND METHOD FOR STARTING AN ENGINE USING A HYDRAULIC HYBRID DRIVETRAIN
The claimed subject matter relates to a series hydraulic hybrid driveline (1) for a vehicle, comprising: a hydraulic circuit (8) comprising a first hydraulic displacement unit (4) in fluid communication with a second hydraulic displacement unit (5), the first hydraulic displacement unit (4) having a variable hydraulic displacement and the first hydraulic displacement unit (4) being drivingly engaged with an internal combustion engine (3); a hydraulic accumulator assembly selectively fluidly connected to the hydraulic circuit (8), the hydraulic accumulator assembly comprising a high pressure hydraulic accumulator (6a) and a low pressure hydraulic accumulator (6b); and a hydraulic actuator (12) adapted to control the hydraulic displacement of the first hydraulic displacement unit (4), the hydraulic actuator (12) being in fluid communication with the hydraulic accumulator assembly and/or with the hydraulic circuit (8). The claimed subject matter further relates to a method of shutting down an engine (3) of a series hydraulic hybrid driveline (1) and of re-starting the engine (3) of a series hydraulic hybrid driveline (1) using energy stored in a hydraulic accumulator assembly.
B60W 10/04 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
B60W 10/06 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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
B60W 20/00 - Control systems specially adapted for hybrid vehicles
A hybrid driveline which may be operated in a hydrostatic drive mode and a direct drive mode and a method of operating a hybrid driveline in a hydrostatic drive mode and a direct drive mode is provided. The hybrid driveline comprises a power source, a first hydrostatic unit drivingly engaged with the power source, a second hydrostatic unit selectively drivingly engaged with a vehicle output and in fluid communication with the first hydrostatic unit, an accumulator assembly in fluid communication with the first hydrostatic unit and the second hydrostatic unit, and a clutching device selectively drivingly engaged with the vehicle output and one of the first hydrostatic unit and the second hydrostatic unit. The hybrid driveline provides the benefits of a series hybrid arrangement and a parallel hybrid arrangement, reduces torque interruptions during operation and shifting procedures, and increases an efficiency of a vehicle the driveline is incorporated in.
The invention relates to dual motor hydraulic hybrid transmission (1, 1'), comprising: a power source (2); a hydraulic circuit (3) comprising: a hydraulic pump (4) drivingly engaged or selectively drivingly engaged with the power source (2); a first hydraulic displacement unit (5) in fluid communication with the hydraulic pump (4); and a second hydraulic displacement unit (6) in fluid communication with the hydraulic pump (4); a hydraulic accumulator assembly (7) comprising a high pressure accumulator (7a) and a low pressure accumulator (7b), the hydraulic accumulator assembly (7) in fluid communication with the hydraulic circuit (3); one or more control valves (PA, PB, VHP, VLP); and an output shaft (11); wherein the first hydraulic displacement unit (5) is drivingly engaged or selectively drivingly engaged with the output shaft (11), and wherein the second hydraulic displacement unit (6) is drivingly engaged or selectively drivingly engaged with the output shaft (11); and wherein the control valves (PA, PB, VHP, VLP) are configured to selectively: fluidly connect the hydraulic pump (4) to the first hydraulic displacement unit (5) while fluidly disconnecting the hydraulic pump (4) from the second hydraulic displacement unit (6); and, simultaneously, fluidly connect the hydraulic accumulator assembly (7) to the second hydraulic displacement unit (6) while fluidly disconnecting the hydraulic accumulator assembly (7) from first hydraulic displacement unit (5).
The invention relates to a series hydraulic hybrid system (1) for a vehicle, comprising: a hydraulic circuit (9) comprising a first hydraulic displacement unit (2) in fluid communication with a second hydraulic displacement unit (3), the first hydraulic displacement unit (2) drivingly engaged with an internal combustion engine (4); a high pressure hydraulic accumulator (10) and a low pressure hydrau- lie accumulator (11) selectively fluidiy connected to the hydraulic circuit (9) through at least one accumulator valve (14, 15); and a control unit (12); wherein the control unit (12) is adapted to: receive an input from an operator; compute, based on the input, a requested torque and a target system pressure; compare an accumulator pressure to the target system pressure; and control, based on the outcome of the comparison, at least one of a speed of the internal combustion engine (4) and a valve state of the accumulator valve (14, 15). The invention further relates to a method of operating a series hydraulic hybrid system.
The Invention relates to a series hydraulic hybrid driveline (1) for a vehicle, comprising: a power source (2); a hydraulic circuit (3) comprising a first hydraulic displacement unit (8) in fluid communication with a second hydraulic displacement unit (9), the first hydraulic displacement unit (8) drivingly engaged or selectively drivingly engaged with the power source (2); at least one accumulator valve (5a-c, 6a-c); a hydraulic accumulator assembly (4) comprising a high pressure hydraulic accumulator (4a) and a low pressure hydaulic accumulator (4b), the accumulator assembly (4) selectively fluidly connected to the hydraulic circuit (3) through the accumulator valve (5a-c, 6a-c); at least one input device (15, 16); and a control unit (7); wherein the control unit (7) is configured to: compute, based on an input command from the input device (15, 16), a total power (23) requested from the power source (2); compare the computed total power to at least one threshold power; and control, based upon the result of the comparison, a valve state of the accumulator valve (5a-c, 6a-c). The invention further relates to a method of controlling the presently proposed system.
B60W 10/04 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
B60W 10/06 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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
B60W 10/24 - Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
The invention relates to a method of charging a hydro-pneumatic energy storage system (1), the system (1) comprising a first hydro-pneumatic accumulator (2a) comprising a first hollow vessel (5a) and, disposed within the first hollow vessel (5a), a first compressible volume (7a) containing a first amount of gas, and the system (1) comprising a second hydro-pneumatic accumulator (2b) comprising a second hollow vessel (5b) and, disposed within the second hollow vessel (5b), a second compressible volume (7b) containing a second amount of gas, the method comprising the steps of: pre-pressurizing the gas contained in the first volume (7a) to a first hydrostatic pre-charge pressure and pre-pressurizing the gas contained in the second volume (7b) to a second hydrostatic pre-charge pressure, the second pre-charge pressure being higher than the first pre-charge pressure; pressurizing the gas in the first volume (7a) by discharging a non-compressible hydraulic fluid into the first vessel (5a) (5a) while keeping a quantity of non-compressible hydraulic fluid contained in the second vessel (5b) (5b) constant to keep the pressure of the gas contained in the second volume (7b) at the second pre-charge pressure; and, when the pressure of the gas in the first volume (7a) reaches the second pre-charge pressure, pressurizing the gas in the second volume (7b) by discharging a non-compressible hydraulic fluid into the second vessel (5b) (5b). The invention further relates to a method of discharging a hydro-pneumatic energy storage system (1) and to a hydro-pneumatic energy storage system (1) for carrying out the proposed charging and discharging methods.
The invention relates to a series hydraulic hybrid system (1) for a vehicle, comprising: a hydraulic circuit (2) comprising a first hydraulic displacement unit (5) in fluid communication with a second hydraulic displacement unit (6), the first hydraulic displacement unit (5) drivingly engaged or selectively drivingly engaged with a power source (9); a hydraulic working assembly (3) comprising a hydraulic implement (15) and a hydraulic working pump (14) in fluid communication with the hydraulic implement (15), the hydraulic working pump (14) drivingly engaged or selectively drivingly engaged with the power source (9); and a hydraulic accumulator assembly (4) comprising a high pressure hydraulic accumulator (4a) and a low pressure hydraulic accumulator (4b), the hydraulic accumulator assembly (4) selectively fluidly connected to the hydraulic circuit (2) and the hydraulic accumulator assembly (4) selectively fluidly connected to the hydraulic working assembly (3).
The invention relates to a series hydraulic hybrid system (1) for a vehicle, comprising: a hydraulic circuit (9) comprising a first hydraulic displacement unit (2) in fluid communication with a second hydraulic displacement unit (3); and a high pressure hydraulic accumulator (10) in fluid communication with the hydraulic circuit (9) and a low pressure hydraulic accumulator (11) in fluid communication with the hydraulic circuit (9); wherein the high pressure hydraulic accumulator (10) is in fluid communication with the hydraulic circuit (9) through a proportional flow control valve (500), the proportional flow control valve (500) being adapted to continuously vary a flow of hydraulic fluid between the high pressure hydraulic accumulator (10) and the hydraulic circuit (9).
A spindle assembly for a tire inflation system having a spindle defining an axial direction and a fluid conduit. A rotatable part is rotatably mounted on the spindle and has a fluid passage. The fluid passage is configured to be in fluid communication with a pneumatic tire. A dynamic annular seal chamber is also provided. The annular seal chamber is disposed radially between the spindle and the rotatable part. The fluid conduit and the fluid passage are in fluid communication with each other through the annular seal chamber. The annular seal chamber is disposed axially between a first volume and a second volume. The first volume and the second volume are in fluid communication with each other through at least one fluid channel for leading fluid leaked out of the annular seal chamber and leaked into the first volume and/or into the second volume through the fluid channel.
B60C 23/00 - Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
A hydrostatic driveline and method of operating a hydrostatic driveline is provided. The hydrostatic driveline comprises a power source, hydrostatic pump, a hydrostatic motor, a direct drive link, a first transmission portion, and a second transmission portion. The direct drive link is in driving engagement with at least one of the power source and the hydrostatic pump. The first transmission portion is in driving engagement with a vehicle output and the hydrostatic motor. The second transmission portion is in driving engagement with the direct drive link and at least one of the vehicle output and the first transmission portion. The hydrostatic pump, the hydrostatic motor, and the first transmission portion form a first power path for the hydrostatic driveline and the direct drive link and the second transmission portion form a second power path for the hydrostatic driveline.
F16H 47/02 - Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
B60K 17/10 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
B60K 17/356 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
A hydrostatic driveline is provided. The hydrostatic driveline comprises a power source, a hydrostatic pump, a hydrostatic motor, a direct drive link, and a transmission portion. The power source is drivingly engaged with an input member. The hydrostatic pump is in driving engagement with the input member. The hydrostatic motor is in fluid communication with the hydrostatic pump. The direct drive link is in driving engagement with the input member. The transmission portion is in driving engagement with a vehicle output and at least one of the hydrostatic motor and the direct drive link. The transmission portion includes at least one engagement device and a drive ratio. The hydrostatic pump, the hydrostatic motor, and the transmission portion form a first power path for the hydrostatic driveline and the direct drive link forms a second power path for the hydrostatic driveline.
F16H 3/00 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
F16H 47/02 - Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
B60K 17/10 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
B60K 17/356 - Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
F16H 3/10 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously- meshing gears, that can be disengaged from their shafts with one or more one-way clutches as an essential feature
The invention relates to a spindle assembly (1) for a tire inflation system, the spindle assembly (1) comprising: a spindle (3) defining an axial direction (2) and comprising a fluid conduit (8a, 8b; 8c); a rotatable part rotatably mounted on the spindle (3) and comprising a fluid passage (12a, 12b; 12c), the fluid passage (12a, 12b; 12c) being configured to be in fluid communication with a pneumatic tire; and a dynamic annular seal chamber (31a, 31b; 31c), the annular seal chamber (31a, 31b; 31c) being disposed radially between the spindle (3) and the rotatable part; wherein the fluid conduit (8a, 8b; 8c) and the fluid passage (12a, 12b; 12c) are in fluid communication with each other through the annular seal chamber (31a, 31b; 31c), the annular seal chamber (31a, 31b; 31c) being disposed axially between a first volume and a second volume; and wherein the first volume and the second volume are in fluid communication with each other through at least one fluid channel (43a, 43b, 44a, 44b; 43c, 43d) for leading fluid leaked out of the annular seal chamber (31a, 31b; 31c) and leaked into the first volume and/or into the second volume through the fluid channel (43a, 43b, 44a, 44b; 43c, 43d).
B60C 23/00 - Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
27.
DRIVE ASSEMBLY FOR A CLUTCH UNIT AND REMOVABLE TRANSMISSION EQUIPPED WITH SAID ASSEMBLY
A drive assembly (10) for a clutch unit (11) of the type comprising an actuating piston (12) for generating a thrust for engagement of said clutch, a bearing (13) for transferring said engagement thrust, and a pusher (14) for discharging said engagement thrust onto said clutch unit (11), said actuating piston (12), said bearing (13) and said pusher (14) being assembled in succession on a transmission shaft (15) carrying said clutch unit (11), a chamber (18A) being provided for supplying a fluid under pressure for generating a disengagement thrust acting on said actuating piston (12), there being provided at least one preloaded spring (19', 19") acting on said actuating piston (12) so as to push it towards said clutch unit (11), wherein said bearing (13) for transferring said thrust is mounted with play directly on said transmission shaft (15), said pusher (14) being disk-shaped and comprising a first face (17) in lateral contact with said bearing (13) and a second face (18) in lateral contact with said clutch unit (11).
F16D 25/08 - Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
F16H 37/04 - Combinations of toothed gearings only
F16H 57/033 - Series gearboxes, e.g. gearboxes based on the same design being available in different sizes or gearboxes using a combination of several standardised units
28.
IMPROVED TRANSMISSION GROUP FOR VEHICLES AND VEHICLE PROVIDED WITH SUCH TRANSMISSION GROUP
Transmission group (10) for vehicles (11) comprising an engine (12) provided with at least one engaging device (17), arranged between transmission gears (15, 16) and mobile between a first rest position, wherein the transmission gears (15, 16) are mutually integral and both in mesh with a transmission shaft (14), and a second working position wherein the first gear (15) is in mesh with the transmission shaft (14) and the second gear (16) is unconstrained both with respect to the transmission shaft (14) and with respect to the gear (15), provided for being means for actuating of the engaging device (17), wherein the engine (12), an output gear (18) and an output shaft (13) are integrated in a first module fixed to the vehicle (11) and that the transmission shaft (14), the transmission gears (15, 16), the engaging device (17) and the actuating means thereof are integrated in a second module (31) independent and demountable with respect to the first module (30).
A transmission has a directional mechanism, a planetary gear mechanism, a stepped transmission and a continuously variable ratio device. The directional mechanism has at least one direction clutch. The planetary gear mechanism is connected to the direction mechanism and has at first planetary gear set and a second planetary gear set. The stepped transmission is connected to the planetary gear mechanism and has at least one speed clutch. The planetary gear mechanism is connected to a hydrostatic motor of the continuously variable ratio device. The motor is connected to a variable displacement pump of the continuously variable ratio device.
F16H 37/06 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts
A vehicle comprises a chassis, a pair of driving wheels, a pair of idle wheels, at least one steering group, and a differential. The steering group is capable of positioning one of the pairs of wheels in a steering geometry where an axis of each of the wheels of the pair of wheels capable of being positioned by the steering group intersects with the remaining axis within a ground-support quadrilateral formed by the pairs of wheels. The differential comprises an outer case, an inner case, a selective engagement, a selective blocking means, and a selective direct gearing means. When the inner case is coupled to the outer case a first half-shaft and a second half-shaft are driven similarly and when the inner case is coupled to the chassis and one of the half-shafts is drivingly engaged with a crown gear the first half-shaft and the second half-shaft are driven opposingly.
B60K 23/04 - Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for differential gearing
B62D 11/10 - Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin- differential or epicyclic gears
F16H 1/28 - Toothed gearings for conveying rotary motion with gears having orbital motion
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