2298results about "Pressure lubrication with lubrication pump" patented technology

A separator for separating oil mist from the crankcase ventilation gas of an internal combustion engine, especially of a motor vehicle. The separator includes a gas purification chamber inside which a rotatably mounted centrifugal rotor is arranged. The gas purification chamber has a crude gas inlet, a pure gas outlet, and an oil outlet. The crankcase ventilation gas can be conducted into a radially internal zone of the centrifugal rotor via the crude gas inlet, while pure gas that is liberated from oil mist can be discharged from the gas purification chamber via the pure gas outlet, and oil separated from the gas can be discharged from the gas purification chamber via the oil outlet. The separator further includes a rotary drive for the centrifugal rotor. The rotary drive is disposed in a drive chamber of the separator, can be operated using pressurized lubrication oil of the internal combustion engine, and is connected to the centrifugal rotor by means of a shaft extending from the drive chamber into the gas purification chamber, from which the drive chamber is separated. The rotary drive is formed by at least one thrust nozzle which is connected to the shaft and to which the pressurized lubrication oil of the internal combustion engine can be fed. The separator includes at least one part of a base that forms the separation between the gas purification chamber and the drive chamber and extends into the drive chamber, the part of the base being fitted with a seat for a bearing of the shaft. The bearing is located at a distance from the centrifugal rotor.

Embodiments of systems and methods disclosed provide a hydraulic fracturing unit that includes a reciprocating plunger pump configured to pump a fracturing fluid and a powertrain configured to power the reciprocating plunger pump. The powertrain includes a prime mover and a drivetrain, the prime mover including a gas turbine engine. The hydraulic fracturing unit also includes auxiliary equipment configured to support operation of the hydraulic fracturing unit including the reciprocating plunger pump and the powertrain. A power system is configured to power the auxiliary equipment. The power system includes a power source and a power network. The power source is configured to generate power for the auxiliary equipment. The power network is coupled to the power source and the auxiliary equipment, and configured to deliver the power generated by the power source to the auxiliary equipment. Associated systems including a plurality of hydraulic fracturing units are also provided.

A lubrication system for an engine including a sump for lubricant, a main pump operable to pump lubricant to first lubrication positions within the engine, and an auxiliary lubricant pump also operable to pump lubricant to second lubrication positions within the engine and wherein the auxiliary pump is an electrically driven pump which is controlled by a system controller the output of the auxiliary pump being controlled according to engine operating conditions, the main pump in use, pumping lubricant to the first lubrication positions within the engine along a main lubricant feed line, and the auxiliary pump when operated pumping lubricant to the second lubrication positions within the engine along an auxiliary feed line, and wherein the main and auxiliary feed lines, are connected via a communication passage which includes a closeable communication valve, the communication valve when closed preventing the flow of lubricant from the auxiliary feed line to the first lubrication positions, and when open permitting the flow of lubricant from the auxiliary feed line to the first lubrication positions.

An oil supply device for an engine includes a first oil suction passage, a second oil suction passage, a first pump for sucking and discharging oil from the first oil suction passage, a second pump arranged in series with the first pump, the second pump for sucking and discharging oil from at least one of the first pump and the second oil suction passage, a check valve for blocking oil circulation, a first oil passage, a second oil passage, a third oil passage for establishing communication between the first oil passage and the second oil passage, and a supply volume control device for varying oil supply volume to a lubrication system portion, to a cooling system portion, or to the lubrication system portion and the cooling system portion in accordance with a change in at least one of an engine oil temperature, an engine rotation speed, and an engine load.

A marine diesel engine system includes a diesel engine having a plurality of cylinders. The system also includes, proximate the engine, a primary engine lubricant and an additive selected from certain alkylamine-alkylphosphates, 500 TBN calcium sulfonate and mixtures thereof. A means for blending the lubricant and additives into a mixture for introduction into a cylinder is provided. Thus lubricant properties may be modified depending upon engine conditions.

A hydraulic circuit control device that selectively supplies oil to a first oil passage and a second oil passage by an oil pump, the control device includes: an oil passage switching unit adapted to connect the oil pump to either the first oil passage or the second oil passage; a control mode switching unit adapted to switch the control mode of the electric motor to either a torque control mode or a speed control mode; an oil passage selecting unit adapted to select whether to connect the oil pump to the first oil passage or the second oil passage; and a control unit adapted to perform control so that the control mode switching unit switches the control mode to the torque control mode when the first oil passage has been selected, and perform control so that the control mode switching unit switches the control mode to the speed control mode when the second oil passage has been selected.

A motor has a stator core, a coil, a rotor, and a motor case in which the stator core, the coil, and the rotor are housed. The motor is also provided with a fluid carrying member that is arranged around a coil end of the coil in the motor case and has an inlet hole that is communicated with a fluid supply source and a distribution hole that is communicated with a space inside the motor case.

A Stirling cycle machine. The machine includes at least one rocking drive mechanism which includes: a rocking beam having a rocker pivot, at least one cylinder and at least one piston. The piston is housed within a respective cylinder and is capable of substantially linearly reciprocating within the respective cylinder. Also, the drive mechanism includes at least one coupling assembly having a proximal end and a distal end. The proximal end is connected to the piston and the distal end is connected to the rocking beam by an end pivot. The linear motion of the piston is converted to rotary motion of the rocking beam. Also, a crankcase housing the rocking beam and housing a first portion of the coupling assembly is included. A crankshaft coupled to the rocking beam by way of a connecting rod is also included. The rotary motion of the rocking beam is transferred to the crankshaft. The machine also includes a working space housing the at least one cylinder, the at least one piston and a second portion of the coupling assembly. A seal is included for sealing the workspace from the crankcase.

A method of controlling the delivery of fluid to an engine includes receiving a fuel flow rate signal. An electric pump is arranged to deliver fluid to the engine. The speed of the electric pump is controlled based on the fuel flow rate signal.

A tank assembly for a dry sump lubrication system for an internal combustion engine is disclosed. The tank assembly includes a tank having an upper tank portion and a lower tank portion. An interface assembly is disposed at the lower tank portion and is configured to operably deliver and receive a lubricant to and from the engine. A first end of a return tube in fluid communication with a second end is configured to receive lubricant from the engine at the interface assembly. The second end opposite the first end is in fluid communication with the upper tank portion. In this manner, a return hose and a feed hose may be connected to a same portion of the tank assembly.

A diesel engine operating on a fuel containing from about 5 to about 100 wt. % bio-diesel components and being lubricated with a lubricating oil composition including a major amount of oil of lubricating viscosity, and a minor amount of at least one highly grafted, multi-functional olefin copolymer. The olefin copolymer is made by reacting an acylating agent with an olefin copolymer having a number average molecular weight greater than about 1,000 in the present of a free radical initiator to provide an acylated olefin copolymer having a degree of grafting (DOG) of the acylating agent on the olefin copolymer of at least 0.5 wt. %, and reacting the acylated olefin copolymer with an amine to provide the highly grafted, multi-functional olefin copolymer. As used, the highly grafted, multi-functional olefin copolymer is effective to reduce a viscosity increase in the lubricating oil composition for the engine.

Embodiments of systems and methods disclosed provide a hydraulic fracturing unit that includes a reciprocating plunger pump configured to pump a fracturing fluid and a powertrain configured to power the reciprocating plunger pump. The powertrain includes a prime mover and a drivetrain, the prime mover including a gas turbine engine. The hydraulic fracturing unit also includes auxiliary equipment configured to support operation of the hydraulic fracturing unit including the reciprocating plunger pump and the powertrain. A power system is configured to power the auxiliary equipment. The power system includes a power source and a power network. The power source is configured to generate power for the auxiliary equipment. The power network is coupled to the power source and the auxiliary equipment, and configured to deliver the power generated by the power source to the auxiliary equipment. Associated systems including a plurality of hydraulic fracturing units are also provided.

A two stroke cycle internal combustion engine machine that does not require lubricating oil to be mixed with its fuel, producing greater efficiency, higher power to weight ratio, cooler operating temperatures, a wider speed range, greater simplicity, and lower toxic emissions, many of the improvements also transferable to four stroke engines.

A motor has a stator core, a coil, a rotor, and a motor case in which the stator core, the coil, and the rotor are housed. The motor is also provided with a fluid carrying member that is arranged around a coil end of the coil in the motor case and has an inlet hole that is communicated with a fluid supply source and a distribution hole that is communicated with a space inside the motor case.

The present invention provides an apparatus and method for controlling the operation of an electric oil pump for creating a working fluid pressure in a transmission and a clutch for a hybrid vehicle, which can accurately reflect the viscosity characteristics of oil to accurately control the operation of the pump, instead of measuring the temperature of the oil to reflect the state of the oil. In preferred embodiments, the present invention provides an apparatus for controlling the operation of an electric oil pump, the apparatus including: a current detector for detecting a current applied to a motor of an electric oil pump; a rotational speed detector for detecting a rotational speed of the motor; and a controller for calculating a load torque of the motor based on the detection values of the current detector and the rotational speed detector, calculating a target rotational speed based on the detection values, and controlling the operation of the motor based on the target rotational speed.

An oil supply system for a vehicle includes: a mechanical oil pump driven by an engine; an electric oil pump driven by an electric motor; a hydraulic pressure control circuit supplied with oil from the mechanical oil pump and the electric oil pump through an oil discharge passage for the mechanical oil pump and an oil discharge passage for the electric oil pump, which are connected to each other; a lubrication / cooling oil passage that is supplied with the oil from the hydraulic pressure control circuit; and a communication passage that provides communication between the lubrication / cooling oil passage and the mechanical oil pump. With this oil supply system, it is possible to prevent the electric oil pump from causing air-sucking noise, for example, in the motor-power cruise mode, and to improve the rising characteristics of the hydraulic pressure produced by the mechanical oil pump during startup of the engine.

An engine-pressurized prestart oiler for an engine having pressure lubrication is provided, which rapidly lubricates critical engine bearing surfaces prior to the starting sequence. An accumulator for storing oil and pressurized air contains an air-oil separation float, which essentially fills the internal cross-sectional area and prevents absorption of the air. Discharge and recharge of the accumulator is preferably implemented by a normally closed solenoid valve. Discharge is controlled either manually by a switch or automatically by circuitry containing ignition-off time and accumulator pressure comparators, a starter interrupter, and a prestart oiling timer. Recharge is automatic, as the solenoid valve allows oil flow whenever the engine oil pressure sufficiently exceeds the accumulator pressure. A conduit connects the accumulator, solenoid valve, and engine, connecting to the engine either at the oil pressure sensor port or through an adaptor installed between the oil filter and the oil filter mount.

A traditional variable displacement vane pump must be designed to provide maximum fluid pressure and thus experiences reduced energy efficiency when the system operating conditions do not necessitate such high requirements. A variable displacement variable pressure vane pump system is provided comprising a first control mechanism, which can be a control chamber (68) directly acting on the control slider (36) or a control chamber (68) and control cylinder (44) which acts on the control slider (36) and a second control mechanism which is a control chamber (72) and control cylinder (44) which acts on the control slider (36). A control valve (76), operated by an engine control unit or other suitable control mechanism, selectively provides pressurized lubrication oil to the second control mechanism to allow the output of the pump system to more closely match the requirements of the mechanical system.

The present disclosure is applicable to all gear trains using a journal bearing as a means of supporting gear shaft rotation. It is related in some embodiments to a system and method for supplying lubricant to the journal bearings of a gear-turbofan engine gear train when the fan rotor is subjected to a wind-milling condition in both directions, either clockwise or counter-clockwise.

A system for controlling hydraulic pressure and flow rate of oil in an engine, may include a first solenoid valve disposed in a channel connecting an inlet and an outlet of an oil pump supplying oil from an oil pan to the engine, and an electronic controller controlling the first solenoid valve on the basis of number of revolution of the engine, load of the engine, and temperature of the oil.

An oil supply system for a reciprocating piston internal combustion engine is disclosed in which the supply of oil to piston cooling jets is controlled by pressure operated valves designed to open at a pre-defined valve opening pressure. The pressure of oil supplied by a pump is controlled to be below this pre-defined valve opening pressure during operation of the engine in which piston cooling is not required, and the pressure of oil is controlled to above the pre-defined valve opening pressure when piston cooling is required. The control of the pump is by an electronic control unit based upon a combination of engine speed and engine load.

An oil-feeding device for a crankshaft where the amount of lubricant oil leaking from supporting areas of main journal portions is reduced without increasing friction of bearing members against the main journal portions. The oil-feeding device for a crankshaft includes upper bearing members and lower bearing members. The upper and lower bearing members have a half hollow cylindrical shape, are provided with crush relief portions at both ends, and jointly encompass main journal portions of a crank shaft. The upper bearing members have circumferentially extending oil grooves provided in the faces opposite the main journal portions, the grooves penetrating through oil passages of a cylinder block. The lower bearing members do not have oil grooves. The oil grooves do not extend in the crush relief portions, and therefore the leakage of lubricant oil, fed to the oil grooves, to the areas of the crush relief portions is suppressed.

An internal combustion engine arrangement 7 with a variable cam timing unit pressurized oil supply arrangement 49 is provided. A first pump 44 delivers oil through a first check valve 62 to a VCT unit 83 and additionally provides oil to the engine lubrication system. A second oil pump 104 provides pressurized oil to the VCT unit 83 through a second check valve 106. An accumulator 114 is connected between the first 62 and second 106 check valves to pressurize oil delivered to the variable cam timing unit 83.

Apparatus and method for supplying lubricant to a plurality of lubrication sites. Embodiments include a pump with venting and non-venting piston return, a pump with stirrer and direct feed mechanism, a pump with CAN system and self-diagnostics, a pump with heated housing and reservoir and a pump with stepper motor and overdrive control.

A powertrain assembly having an improved engine configuration includes an engine and a transmission incorporated in a crankcase of the engine. The engine also comprises an oil pump and a water pump. The transmission is a cartridge-type shift drum transmission, which can be attached to or detached from a transmission attachment face which is a side face of the crankcase. The oil pump and the transmission attachment face are arranged in substantially non-overlapping relation in the side view of the engine. The water pump shaft is substantially coaxial with the oil pump shaft, and the water pump is positioned below a drive sprocket on the transmission countershaft so as to be overlapping while eliminating interference between them, allowing a close arrangement of components.

A lubricating oil supplying system for an internal combustion engine includes a lubricating oil storage section for storing lubricating oil. A driven pump is driven by the internal combustion engine to suck the lubricating oil from the lubricating oil storage section and discharge the lubricating oil to a discharge passage. An electric pump is provided for sucking the lubricating oil discharged from the driven pump to the discharge passage and discharge the lubricating oil to a lubricating oil requiring section in the internal combustion engine. A controlling mechanism is provided for drivingly controlling the electric pump in accordance with a control signal. A bypass passage is provided for bypassing the driven pump. A check valve is disposed in the bypass passage to allow the lubricating oil in the lubricating oil storage section to flow only through a path bypassing said driven pump and toward side of the discharge passage.

A control device has a mechanical oil pump driven by an engine and an electric oil pump supplying oil via a check valve in an oil passage connecting the mechanical oil pump and the electric oil pump, the check valve allowing a flow of the oil from the electric oil pump side to the mechanical oil pump side while blocking a flow in an opposite direction, regardless of the pressure of the electric oil pump. When the check valve is closed under an oil pressure condition in which the electric oil pump outputs a maximum output oil pressure while the mechanical oil pump is driven by the engine at idle, the control device is configured to drive the electric oil pump during stop of the mechanical oil pump, and to stop the electric oil pump based on a load increase after start of the mechanical oil pump.