Abrégé

A large engine, in particular a marine engine or engine for power plants, and a method of lubricating the engine with spray injectors, in particular SIP injectors. According to the method there is provided a controller arranged for varying and con- trolling the pressure in the lubricant supply conduit within a desired pressure range and basing the desired pressure on the engine load and a measurement of the actual pressure in the lubricant supply conduit.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

A large engine, in particular a marine engine or engine for power plants, and a method of lubricating the engine with injectors. The method and engine are arranged for cyclic operation and cyclic operation and in the injection phase, providing pressure-liquid through a common rail system where all injectors are connected to the lubricant supply conduit and wherein the method and engine is arranged for operating within the following parameters:and wherein the values of the six parameters are selected so that the cavitation number is smaller than 1.5 and so that the ratio of the resulting force acting on the needle to the mass of the needle is above 50 m/s2 for the intended operation.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• B05B 17/04 - Appareils de pulvérisation ou d'atomisation de liquides ou d'autres matériaux fluides, non couverts par les autres groupes de la présente sous-classe opérant suivant des procédés particuliers

Abrégé

A large engine, in particular a marine engine or engine for power plants, and a method of lubricating the engine with injectors. According to the method there are provided one flowmeter for all injectors in the engine, one flowmeter for all injectors in a cylinder or one flowmeter for each injector in the engine. The method comprises the steps of measuring with the at least one flowmeter the lubricant flow, transforming in the controller the measured actual flow into an actual amount, comparing the calculated actual amount to the desired value, and controlling the injectors and adjusting the setting thereof in order to regulate the amount to the desired value for lubricant amount to be injected for a specific operation mode.

Classes IPC  ?

• F16N 7/38 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification
• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant

Abrégé

The present invention presents a method for lubricating large slow-running marine diesel engines, having at least one cylinder (51) with a piston (52) having a ring pack (56, 57). Injection of lubricating oil is performed via an injection unit (53) for each cylinder. Each injection unit is controlled by a control unit (254) where a plurality of lubrication routines are stored in a memory. The control unit receives input either from an input station or from one or more sensors. The input may determine implementation of one of a multitude of possible lubrication routines, where each lubrication routine is distinguished by a duration, a feed rate adjustment in percentage of the total needed lubricating oil amount and two or more distinct injection phases relative to the position of the piston. Each of the two or more distinct injection phases will inject a quantity of lubricating oil expressed in percentages of the total amount of lubricating oil to be injected.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant

Abrégé

Disclosed is lubrication for a slow-running two-stroke engine, especially marine diesel engines. The lubrication uses Swirl Injection Principle by locating the lubricant injectors closer to the TDC than ⅕ of the full stroke of the piston, which is closer than in typical marine diesel engines. This can be achieved by reconstructing cylinder liners or by adding new mounting holes to the cylinder. In case that such reconstruction is not possible, an improvement of SIP principles can also be achieved by directing the spray towards the TDC or to a location on the cylinder liner closer to the TDC as compared to the location of the SIP valves, for example under an angle of more than 30 degrees or even more than 60 degrees when measured from a plane normal to the cylinder axis.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 11/02 - Aménagements des conduits de lubrification
• F01M 1/20 - Dispositifs indicateurs ou de sécurité concernant la pression du lubrifiant
• F02F 1/20 - Autres cylindres caractérisés par des particularités de structures en vue de la lubrification
• F16N 7/38 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification

Abrégé

A large engine, in particular a marine engine or engine for power plants, a multiple-oil injector (4) and a method of lubricating the engine with a plurality of injectors (4) wherein the injectors comprise a first and a second lubricant inlet, an internal electrically actuated selection-valve system (13) that can switch between two different types of lubricants.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant

Abrégé

By deforming the valve-seat (23) of a non-return valve system (102) in a lubricator pump unit (11), especially of the Alpha-type, a lubrication system in a large slow- running two-stroke engine is improved.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

By modifying the valve-seat (23) of a non-return valve system (102) in a lubricator pump unit (11), especially of the Alpha-type, a lubrication system in a large slow- running two-stroke engine is improved.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

By mounting an insert as a substitution for an existing valve-seat (24) of a non-return valve system (102) in a lubricator pump unit (11), especially of the Alpha-type, a lubrication system in a large slow-running two-stroke engine is improved.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F16N 7/38 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification
• F16N 13/04 - Pompes alternatives réglables
• F16N 29/02 - Dispositifs particuliers dans les installations ou les systèmes de lubrification indiquant ou détectant des conditions indésirablesUtilisation des dispositifs sensibles à ces conditions dans les installations ou les systèmes de lubrification agissant sur l'alimentation en lubrifiant
• F16N 13/16 - Entraînement des pompes de graissage avec entraînement par fluide

Abrégé

A method for optimizing lubrication in a large slow-running two-stroke engine by which an existing lubrication system is modified for more frequent injection and lower lubricant volume per injection.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F16N 7/38 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification
• F16N 13/04 - Pompes alternatives réglables
• F16N 13/16 - Entraînement des pompes de graissage avec entraînement par fluide
• F16N 29/02 - Dispositifs particuliers dans les installations ou les systèmes de lubrification indiquant ou détectant des conditions indésirablesUtilisation des dispositifs sensibles à ces conditions dans les installations ou les systèmes de lubrification agissant sur l'alimentation en lubrifiant
• F01M 1/02 - Lubrification sous pression utilisant des pompes de lubrification
• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

A method for optimizing lubrication in a large slow-running two-stroke engine by which an existing lubrication system is upgraded by inserting an upgrade valve system downstream of an existing lubricator.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F16N 7/38 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification
• F16N 13/04 - Pompes alternatives réglables
• F16N 13/16 - Entraînement des pompes de graissage avec entraînement par fluide
• F16N 29/02 - Dispositifs particuliers dans les installations ou les systèmes de lubrification indiquant ou détectant des conditions indésirablesUtilisation des dispositifs sensibles à ces conditions dans les installations ou les systèmes de lubrification agissant sur l'alimentation en lubrifiant
• F01M 1/02 - Lubrification sous pression utilisant des pompes de lubrification
• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

A large slow-running two-stroke engine comprising a cylinder (1) with a reciprocal piston inside and with a plurality of injectors (4) distributed along a perimeter of the cylinder (1) for injection of lubricant into the cylinder (1) at various positions on the perimeter. A controller (11) is provided for controlling the amount and timing of the lubricant injection through the injectors (4). The controller (11) comprises a dosing unit (26) with a dosing chamber (29) in cyclic operation between an injection phase where the accumulated lubricant is dispensed from the dosing chamber (29) to the injectors (4) and a subsequent accumulation phase with accumulation of lubricant in the dosing chamber (29). A flow meter (31) connected to the dosing chamber (29) is measuring the volume of the lubricant flowing into the dosing chamber (29) in the accumulation phase for measuring the injected volume of lubricant in the preceding injection phase.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F16N 25/02 - Dispositifs de distribution à tiroir alternatif de distribution

Abrégé

A large slow-running two-stroke engine comprising a cylinder (1) with a reciprocal piston inside and with a plurality of injectors (4) distributed along a perimeter of the cylinder (1) for injection of lubricant into the cylinder (1) at various positions on the perimeter; the engine further comprising a controller (11) for controlling the amount and timing of the lubricant injection by at least one of the injectors (4); wherein each injector (4) comprises a lubricant inlet (12) for receiving lubricant from a lubricant feed conduit (9); a nozzle (5) with a nozzle aperture (5') extending into the cylinder (1) for injecting lubricant from the inlet (12) into a cylinder (1) in an injection phase; an outlet-valve system (15) at the nozzle (5) for opening and closing for flow of lubricant to the nozzle aperture (5') during an injection cycle; the outlet-valve system (15) being configured for opening for flow of lubricant to the nozzle aperture (5 ") during an injection phase upon pressure rise above a predetermined limit at the outlet- valve system (15) and for closing the outlet- valve system ( 15) after the injection phase; a lubricant flow path from the lubricant inlet (12) to the outlet-valve system (15) for flow of the lubricant from the lubricant inlet (12) and to the nozzle (5), through the outlet-valve system (15) and out of the injector (4) at the nozzle aperture (5'); wherein each injector (4) comprises an electrically-driven inlet-valve system (13) electrically connected to the controller (11) for regulating the lubricant that is dispensed through the nozzle aperture (5 ') by opening or closing for lubricant flow from the lubricant inlet (12) to the outlet-valve system (15) in dependence of an electrical control-signal received from the controller (11); wherein electrically-driven inlet- valve system (13) is arranged upstream of the nozzle (5) and spaced from the nozzle (5) and upstream of the outlet-valve system (15) and spaced from the outlet-valve system (15).

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant

Abrégé

A large slow-running two-stroke engine and a method of lubricating the engine with an injector (4) that comprises an internal electrical pumping system (21) for pressurising lubricant for ejection, for example a solenoid coil (23) with a solenoid plunger (24).

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

A large slow-running two-stroke engine comprising a cylinder (1) with a reciprocal piston inside and with a plurality of injectors (4) distributed along a perimeter of the cylinder (1) for injection of lubricant into the cylinder (1) at various positions on the perimeter. The injectors (4) comprise a pumping system (27, 28, 29) with a hydraulically driven plunger (29) that pressurises the lubricant inside the injectors (4) up to ejection through the nozzle aperture (5').

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

A large slow-running two-stroke engine comprising a cylinder (1) with a reciprocal piston inside and with a plurality of injectors (4) distributed along a perimeter of the cylinder (1) for injection of lubricant into the cylinder (1) at various positions on the perimeter. A controller (11) is provided for controlling the amount and timing of the lubricant injection through the injectors (4). The injectors (4) comprise a hydraulic pumping system (27, 28, 29) with a hydraulically driven plunger-member (29) that pressurises the lubricant inside the injectors (4) up to ejection through the nozzle aperture (5'). The plunger is activated in steps or comprises multiple plunger elements that are activated sequentially.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

A method for lubricating a large slow-running two-stroke engine. The lubricant viscosity and pressure is selected such that cavitation is provided in the nozzle and potentially is extending to the nozzle exit.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F16N 7/34 - Dispositifs pour vaporiser l'huile
• F16N 7/38 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification
• B05B 17/06 - Appareils de pulvérisation ou d'atomisation de liquides ou d'autres matériaux fluides, non couverts par les autres groupes de la présente sous-classe opérant suivant des procédés particuliers utilisant des vibrations ultrasonores

Abrégé

Disclosed is lubrication for a slow-running two-stroke engine, especially marine diesel engines. The lubrication uses Swirl Injection Principle by locating the lubricant injectors closer to the TDC than ⅕ of the full stroke of the piston, which is closer than in typical marine diesel engines. This can be achieved by reconstructing cylinder liners or by adding new mounting holes to the cylinder. In case that such reconstruction is not possible, an improvement of SIP principles can also be achieved by directing the spray towards the TDC or to a location on the cylinder liner closer to the TDC as compared to the location of the SIP valves, for example under an angle of more than 30 degrees or even more than 60 degrees when measured from a plane normal to the cylinder axis.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 11/02 - Aménagements des conduits de lubrification
• F01M 1/20 - Dispositifs indicateurs ou de sécurité concernant la pression du lubrifiant
• F02F 1/20 - Autres cylindres caractérisés par des particularités de structures en vue de la lubrification
• F16N 7/38 - Installations à huile ou autre lubrifiant non spécifié, à réservoir ou autre source portés par la machine ou l'organe machine à lubrifier avec pompe séparéeInstallations centralisées de lubrification

Abrégé

Safety system for lubrication of the cylinder of a large slow- running internal combustion engine and a large slow- running two-stroke internal combustion engine A system for lubrication of the cylinder (1) of a large slow-running internal combustion engine. The lubrication system comprises a plurality of lubricant injectors (4) of which each one is connected via one of a corresponding plurality of lubricant supply lines (9) to a lubricant pump unit (11). The injectors (4) have an injection pressure level at which the injectors (4) are activated for ejecting lubricant. Each of the plurality of lubricant supply lines (9) is connected to an upstream side of one of a corresponding plurality of overpressure relief valves (16) for opening the overpressure re- lief valve (16) when the pressure in the corresponding lubricant supply line (9) exceeds a predetermined overpressure relief level which is above the injection pressure level. The downstream sides of all overpressure relief valves (16) are connected to a common overpressure detection device (17, 19, 26), which is configured for giving a signal when a pressure in any one of the plurality of lubricant supply lines (9) exceeds the predetermined overpressure relief level. In particular, the overpressure relief valves (16) are provided remotely from the lubricant pump unit (11) and are communicating only by pipes (9, 15) via the lubricant supply lines (9) to the lubricant pump unit (11).

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 11/10 - Dispositifs indicateursAutres dispositifs de sécurité
• F01M 11/02 - Aménagements des conduits de lubrification

Abrégé

The method comprises steps for delivering lubricating oil under pressure from a lubricating oil reservoir (7) via a forced lubrication system to injectors (3) provided in the cylinder walls. A number of injectors (3) are used, each adapted for injecting a dosed amount of lubricating oil into each cylinder. The method further includes steps of: - establishing data indicating the temperature of cylinder linings (5); - establishing data that indicate the temperature of the lubricating oil in the lubricating oil reservoir (7); - storing the temperature data for cylinder linings (5) and the lubricating oil in a computer; - establishing at least one temperature regulating unit (9) controlled by the computer and connected with the delivered lubricating oil for establishing a temperature regulation of the lubricating oil before injection into the cylinder; - controlling the temperature regulation of the lubricating oil in dependence of the temperature of the cylinder linings (5) and the temperature of the lubricating oil in the lubricating oil reservoir (7), as the computer controls heating/cooling in the temperature regulating unit (9) for influencing the viscosity of the lubricating oil such that a uniform injection independent of the temperature of the cylinder linings (5) is established.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F16N 39/04 - Dispositions pour conditionner des lubrifiants dans les circuits de lubrification par chauffage

Abrégé

An improvement for lubrication in slow-running two-stroke engine, especially marine diesel engines, is achieved in lubrication using Swirl Injection Principle (SIP) by lo- cating the lubricant injectors (4) closer to the TDC than 1/5 of the full stroke of the piston (32), which is closer than in typical marine diesel engines. This can be achieved by reconstructing cylinder liners (2) or by adding new mounting holes to the cylinder (3). In case that such reconstruction is not possible, an improvement of SIP principles can also be achieved by directing the spray towards the TDC or to a location on the cylinder liner (2) closer to the TDC as compared to the location of the SIP valves, for example under an angle of more than 30 degrees or even more than 60 degrees when measured from a plane normal to the cylinder axis. The two improvements can be combined.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F02F 1/20 - Autres cylindres caractérisés par des particularités de structures en vue de la lubrification

Abrégé

Injectors for injection of lubrication oil into the cylinder of a large slow-running two-stroke engine, especially marine diesel engine, proved better uniform performance the when using hardened surfaces for the plain bearing in which the valve member slides. Also, hardened surfaces for valve seats at the nozzle was an improvement.

Classes IPC  ?

• F02M 61/12 - Autres injecteurs avec corps des clapets allongés, p. ex. du type soupapes à aiguille caractérisés par l'existence de moyens de guidage ou de centrage pour les corps de clapets
• F02M 63/00 - Autres appareils d'injection ayant des caractéristiques particulières non couvertes dans les groupes ou Détails, parties constitutives ou accessoires non couverts dans les groupes ou ou présentant un intérêt autre que celui visé par ces groupes
• F02M 61/16 - Détails non couverts dans les groupes ou présentant un intérêt autre que celui visé par ces groupes
• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

A method is provided where piston pumps (10-21, 21a) are used for injection of oil into engine cylinders (250). The pistons (4) in piston pumps (10-21, 21a) are advanced through a plurality of partial strokes (Ps) over multiple engine revolutions before being retracted.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F16N 13/04 - Pompes alternatives réglables

Abrégé

There is disclosed a system for dosing lubricating oil into cylinders, preferably in twostroke diesel engines, for example marine engines. The system includes: - injection units (251) provided in the walls (57) of the cylinders as a number of injection units are used for each cylinder; - a lubricating apparatus (252) for delivering a dosed amount of lubricating oil under pressure to the injection units; - means (56) for detecting the load of the engine; - an exhaust valve (55) connected to an actuator (53) for displacing the exhaust valve; and - a control unit (50) for electronic control and timing of the closing time of the exhaust valve of the cylinder, depending on detection of the engine load, as a signal is transmitted to the actuator, and as an adjustment of the closing time of the exhaust valve in relation to the actual engine load is performed. The control unit is also adapted to electronic control and timing of the lubricating oil delivery. In order to possibly improve engine emission and enhance utilisation of the lubricating oil, the system further includes: - a connection (44) between the means (56) for detecting the engine load and the control unit (50) for transferring the detected data; and - a connection (43) between the control unit (50) and the lubricating apparatus (252) for transferring a control signal to the lubricating apparatus for adjusting the timing of the lubricating oil delivery in dependence of the engine load.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 1/14 - Lubrification à temps

Abrégé

An injection nozzle for use in injecting lubricating oil into cylinders in large engines is provided. The nozzle is adapted for fastening in a cylinder wall with a nozzle rod extending through the cylinder wall and with a nozzle outlet at the inner end of the nozzle rod. The nozzle rod includes a cylindrical valve seat boring with a displaceable valve body having a cylindrical sealing face which interacts with the cylindrical valve seat boring of the nozzle rod, the valve body biased by a spring for effective closing of the valve. The valve body is formed by a cylindrical rod having a turned recess in the cylindrical sealing face of the valve body. The turned recess is arranged at the inner end of the valve body with parts of the cylindrical sealing face of the valve body at each side of the turned recess.

Classes IPC  ?

• F02M 61/14 - Disposition des injecteurs par rapport aux moteursMontage des injecteurs
• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F02M 59/44 - Détails, parties constitutives ou accessoires, non couverts dans les groupes ou présentant un intérêt autre que celui visé par ces groupes

Abrégé

There is described an injection nozzle for use in injecting lubricating oil into cylinders in large engines. The nozzle is adapted for fastening in a cylinder wall with a nozzle rod extending through the cylinder wall and with a nozzle outlet at the inner end of the nozzle rod. The nozzle rod includes a cylindrical valve seat boring with a displaceable valve body having a cylindrical sealing face which interacts with the cylindrical valve seat boring of the nozzle rod, the valve body biased by a spring for effective closing of the valve. The valve body is formed by a cylindrical rod having a turned recess in the cylindrical sealing face of the valve body. The turned recess is arranged at the inner end of the valve body with parts of the cylindrical sealing face of the valve body at each side of the turned recess. The turned recess is connected with the nozzle outlet at the forward displacement of the valve body against the action of the spring.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

There is disclosed dosing system and a method for cylinder lubrication oil in large diesel engine cylinders, e.g. in marine engines, including: - a lubricating oil supply that may be constituted by a pump station or an accumulator; - a supply line from the lubricating oil supply; - a number of injectors having an inlet, an opening/closing valve unit and one or more nozzle apertures for injecting cylinder lubricating oil into an associated cylinder, and which are connected with the supply line and corresponding to the number of cylinders in the engine or a multiple thereof; and - a control unit controlling each opening/closing valve unit. Furthermore, there is disclosed an injector for use in the system. In order to overcome the drawback of dependence on flow and viscosity in the supply pipes, the system is peculiar in that the dosing system includes a flow measuring unit for each injector and/or for each cylinder, and that the flow measuring units are connected with the control unit for use in a closed circuit regulation.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

There is disclosed an injector (1), a method and a dosing system for injecting cylinder lubrication oil in large diesel engine cylinders, e.g. in marine engines. A number of injectors are arranged in a plane perpendicular to the cylinder axis, and each injector includes an injector housing (25) and a nozzle tip (5) provided in continuation of the injector housing, the nozzle tip provided at its outer free end with several nozzle apertures (10) for delivering several lubricating oil jets (A, B, C, D) from each injector onto the cylinder wall (10). In order to perform even distribution of the lubricating oil even if the injectors are not evenly distributed along the periphery of the cylinder, the nozzle apertures are provided under different angles radially relative to a centre line (22) through the nozzle tip as well as axially relatively to a plane perpendicular to the centre line of the nozzle tip. Hereby, the centre (15) of the lubricating oil jets (A, B, C, D) will be provided on the cylinder wall at the same level above the injectors but at different areas of the periphery of the cylinder wall.

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F02F 1/20 - Autres cylindres caractérisés par des particularités de structures en vue de la lubrification

Abrégé

There is disclosed a method for cylinder lubrication of large diesel engines, such as marine engines. Injection of lubricating oil is performed via a number of injection units that correspond to a multiple of the cylinder number in the engine. There is desired an efficient distribution of the lubricating oil, not only across the periphery of the cylinder, but also across the travel of the piston in the cylinder in order thereby to reduce the consumption of lubricating oil. This is achieved in that lubricating oil is supplied by a combination of injection of a first part of the lubricating oil directly on a ring area of the cylinder wall before the passage of the piston and an injection of a second part of the lubricating oil directly onto the piston during its passage.

Classes IPC  ?

• F01M 11/02 - Aménagements des conduits de lubrification

Abrégé

There is disclosed a hydraulic system for cylinder lubrication of engine cylinders in large diesel engines, in particular marine engines, by injection of oil. The system is designed with injectors (13) and a lubricating apparatus (11) which includes a number of pump units (8). Each pump unit (8) is connected with an associated injector (13) via a connecting pipe (12). In the connecting pipe (12), between a pump unit and an associated system unit a leak detector (10) is provided, adapted for emitting a signal when the oil pressure in the connecting pipe (12) go under a predetermined level. Hereby is achieved a reliable, technically simple and cheap system for leak monitoring which enables continuous monitoring of leakage with running engine so as to ascertain if one or more injectors (13) are leaking.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• G01L 7/16 - Mesure de la pression permanente ou quasi permanente d’un fluide ou d’un matériau solide fluent par des éléments mécaniques ou hydrauliques sensibles à la pression sous forme de pistons
• H01H 35/38 - Interrupteurs actionnés par le changement de pression du fluide, par les ondes de pression du fluide, ou par le changement d'écoulement du fluide actionnés par piston et cylindre

Abrégé

There is described a dosing system for cylinder lubrication oil for large diesel engine cylinders (5), e.g. in marine engines (32), and including: a central lubricating oil supply, e.g. a central pump station (1);a supply line (31) and a return line (33) to/from the lubricating oil supply for circulating the lubricating oil;a number of injectors (6) corresponding to the number of cylinders in the engine or a multiple thereof, and which are adapted to inject cylinder lubricating oil into an associated cylinder via a nozzle aperture (20), and which via branch lines (7, 15, 16) are connected with the supply and return lines;opening/closing valve units (3) provided in the branch lines (15, 16) between the injectors (6) and the supply and return lines; and a control unit(25) controlling each opening/closing valve unit (3). In order to achieve a flexible central control of injected amount of oil and precise control of timing, the system is designed such that the opening/closing valve units (3) have a first inlet (P) and a first outlet (R) which may connect a first chamber (22) behind a spring-biased closing member (18) in the injectors with the supply line (31) and the return line (33), respectively. The injector (6) further has a second chamber (24) in front of the closing member (18) of the injector, where the second chamber is connected with a branch line (7) connecting the second chamber (24) of the injector with the supply line (31).The control unit (25) is at least connected with the opening/closing valve units (3).

Classes IPC  ?

• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant

Abrégé

There is disclosed a valve arrangement (1) for dosing a fluid via a dosing unit (2). It includes two valves(V1, V2) with a first and a second valve element (6, 7) for opening and closing ports (A-F) in the valves. The valve arrangement (1) is connected via its ports (C, E, F) with a feed line (3) and a return line (4) connecting the valve arrangement (1) with a pressure source (5) for the fluid. In order to achieve a precise dosing of small amounts of fluid, the valve arrangement is made with a first and a second three-way valve (V1, V2). The first valve (V1) has a first port (A) connected with a first port (D) in the second valve (V2), a second port (B) connected with a connecting line (8) to the dosing unit (2), and a third port (C) connected with the feed or return line (3, 4).The second valve (V2) includes a second port (E) and a third port (F) connected with the feed line (3) or the return line (4). The first valve element (6) has a first position in which the second and third ports (B, C) communicate, and a second position where the first and second ports (A, B) communicate, and the second valve element (7) has a first position in which the first and third ports (D, F) communicate, and a second position where the first and second ports (D, E) communicate.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F16N 25/02 - Dispositifs de distribution à tiroir alternatif de distribution
• F16N 27/00 - Dispositifs de dosage

Abrégé

There is disclosed a method for cylinder lubrication of large diesel engines, such as marine engines. Injection of lubricating oil is performed via a number of injection units that correspond to a multiple of the cylinder number in the engine. There is desired an efficient distribution of the lubricating oil, not only across the periphery of the cylinder, but also across the travel of the piston in the cylinder in order thereby to reduce the consumption of lubricating oil. This is achieved in that lubricating oil is supplied by a combination of injection of a first part of the lubricating oil directly on a ring area of the cylinder wall before the passage of the piston and an injection of a second part of the lubricating oil directly onto the piston during its passage.

Classes IPC  ?

• F01M 1/14 - Lubrification à temps
• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection
• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant

Abrégé

There is described a hydraulic lubricating apparatus (252) for dosing cylinder lubricating oil, including a housing which via one or more valves (220) is connected to a source for supplying hydraulic oil (262) and cylinder lubricating oil (not shown), a number of hydraulic cylinders each having a hydraulic piston (6) and which may be pressurized by hydraulic oil. Furthermore, there are a number of injection units (251) corresponding to a multiple of the cylinder (250) number in the engine, and which are connected with each their dosing cylinder by a dosing piston (21). Also, there is provided a distributor plate (7) which at one side is in contact with the dosing pistons (21) and which at its other side is in contact with the hydraulic pistons (6) for displacing the distributor plate for actuating the dosing pistons. The hydraulic pistons (6) are provided in groups, where each group is adapted for independent displacement of the distributor plate (7) for actuating the dosing pistons, and where each group of hydraulic pistons have each their individual stroke. In that way there may be achieved an individual quantity adjustment of lubricating oil, depending on the group of hydraulic pistons that is activated.

Classes IPC  ?

• F01M 1/00 - Lubrification sous pression

Produits et services

Cylinders of metal. Cylinder heads for engines; apparatus for injection of oil into cylinders; apparatus for lubrication of cylinders; valves; indicator valves. Cylinders for the heating of water, hot water cylinders.

Abrégé

There is disclosed a method and a hydraulic lubricating apparatus for dosing cylinder lubricating oil. The dosing system includes a supply line and a return line connected with the lubricating apparatus via each one or more valves for supplying hydraulic oil, a central hydraulic oil feed pump connected with hydraulic cylinders, each having a hydraulic piston and which may be subjected to pressure by hydraulic oil via the supply line, a number of injection units corresponding to a multiple of the cylinder number in the engine and which are connected with each their dosing cylinder with a dosing piston and a supply line for cylinder lubricating oil. In order to provide a system which is reliable and cheap and where there is no risk of disruptions, even if a hydraulic cylinder fails, the lubricating apparatus is designed with a distributor plate which at one side is in contact with the dosing pistons and which at its other side is in contact with two or more hydraulic pistons for displacing the distributor plate for activating the dosing pistons.

Classes IPC  ?

• F01M 1/04 - Lubrification sous pression utilisant la pression dans le cylindre de travail dans le carter pour actionner les dispositifs d'alimentation en lubrifiant
• B63H 21/18 - Aménagements de l'appareil moteur de propulsion ou de certains de ses éléments pour utilisation à bord des navires le navire étant à propulsion nucléaire

Abrégé

There is described a hydraulic lubricating apparatus and a hydraulic piston for a dosing system for cylinder lubrication oil, e.g. in marine engines. The lubricating apparatus includes at least on hydraulic piston (106) which may be pressurised by hydraulic oil, a number of dosing pistons (21) and a distributor plate (7) which at one side of it is in contact with the dosing pistons (21) and which at its other side is in contact with the at least one hydraulic piston (106) for displacing the distributor plate for actuating the dosing pistons. The hydraulic piston (106) is provided with an inner boring (B) extending in the direction of displacement of the hydraulic piston, the boring being provided with an insert (C5E) including an insert cylinder (C) in which is provided a hollow insert piston (E) in contact with a supply opening (H) for hydraulic oil. Hereby is achieved that the hydraulic piston (106) can be moved faster such that improved pressure and flow conditions and thus substantially enhanced pressure and flow in the atomising nozzles may be attained, and consequently improved performance of the lubricating system.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F16N 13/02 - Pompes de graissage à piston alternatif
• F16N 13/04 - Pompes alternatives réglables

Abrégé

There is described a hydraulic lubricating apparatus (252) for dosing cylinder lubricating oil, including a housing which via one or more valves (220) is connected to a source for supplying hydraulic oil (262) and cylinder lubricating oil (not shown), a number of hydraulic cylinders each having a hydraulic piston (6) and which may be pressurised by hydraulic oil. Furthermore, there are a number of injection units (251) corresponding to a multiple of the cylinder (250) number in the engine, and which are connected with each their dosing cylinder by a dosing piston (21). Also, there is provided a distributor plate (7) which at one side is in contact with the dosing pistons (21) and which at its other side is in contact with the hydraulic pistons (6) for displacing the distributor plate for actuating the dosing pistons. The hydraulic pistons (6) are provided in groups, where each group is adapted for independent displacement of the distributor plate (7) for actuating the dosing pistons, and where each group of hydraulic pistons have each their individual stroke. In that way there may be achieved an individual quantity adjustment of lubricating oil, depending on the group of hydraulic pistons that is activated.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F01M 1/14 - Lubrification à temps

Abrégé

There is disclosed a method and a hydraulic lubricating apparatus for dosing cylinder lubricating oil. The dosing system includes a supply line and a return line connected with the lubricating apparatus via each one or more valves for supplying hydraulic oil, a central hydraulic oil feed pump connected with hydraulic cylinders, each having a hydraulic piston and which may be subjected to pressure by hydraulic oil via the supply line, a number of injection units corresponding to a multiple of the cylinder number in the engine and which are connected with each their dosing cylinder with a dosing piston and a supply line for cylinder lubricating oil. In order to provide a system which is reliable and cheap and where there is no risk of disruptions, even if a hydraulic cylinder fails, the lubricating apparatus is designed with a distributor plate which at one side is in contact with the dosing pistons and which at its other side is in contact with two or more hydraulic pistons for displacing the distributor plate for activating the dosing pistons.

Classes IPC  ?

• F01N 1/16 - Silencieux caractérisés par leur principe de fonctionnement par utilisation de parties mobiles
• F01N 1/08 - Silencieux caractérisés par leur principe de fonctionnement réduisant l'énergie des gaz évacués par étranglement ou tourbillon
• F01N 3/04 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour refroidir ou pour enlever les constituants solides des gaz d'échappement au moyen de liquides

Abrégé

There is disclosed a lubricating apparatus for diesel engine cylinders. The lubricating apparatus includes: - supply line and a return line, a central hydraulic oil supply pump, a number of injection units, each connected with each their dosing unit, and a supply line for cylinder lubricating oil. In order to provide the cylinder lubrication with a flexible electronically controlled, central stepless dosing as well as precise timing, the hydraulic lubricating apparatus includes: - a setting unit with a setting means engaging the dosing unit, a controllable actuator/motor (23) engaging the setting means; a cylinder block with a number of dosing units, each including a dosing piston in a pumping chamber, and a hydraulic slide interacting with the setting means and the pumping piston and extending largely coaxially with the pumping chamber, a monitoring sensor associated with each dosing unit for ensuring stroke/dosing of the amount of cylinder lubricating oil, and a central computer for controlling the motor (23) and the valves (20, 24) for connecting and disconnecting a system pressure on the hydraulic slide at each lubricating point of time.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F01M 1/00 - Lubrification sous pression
• F01M 1/02 - Lubrification sous pression utilisant des pompes de lubrification
• F01M 3/04 - Lubrification spécialement adaptée pour les moteurs avec compression du mélange air-carburant en carter ou pour les autres moteurs dans lesquels le lubrifiant est incorporé au carburant, à l'air ou au mélange air-carburant pour lubrification des hauts de cylindre uniquement

Abrégé

There is described a method and a system for lubricating the cylinder surfaces 1 in large diesel engines. The system includes a lubricating apparatus 3 with a number of reciprocating pumps 4 which via connecting lines 5 are connected with lubricating points 6 in the cylinder linings 7. In order to enable electronically controlled regulation of the lubricating oil portion, there is provided an electronic control unit 9 which is connected with a flow regulator 8.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F01M 1/02 - Lubrification sous pression utilisant des pompes de lubrification
• F01M 3/04 - Lubrification spécialement adaptée pour les moteurs avec compression du mélange air-carburant en carter ou pour les autres moteurs dans lesquels le lubrifiant est incorporé au carburant, à l'air ou au mélange air-carburant pour lubrification des hauts de cylindre uniquement
• F16N 13/04 - Pompes alternatives réglables