38results about "Engine revolutions" patented technology

A variable displacement vane-type fluid pump is provided which permits improved regulation of the pump discharge such that the pump can meet the various requirements of lubrication for internal combustion engines at all speeds with minimized use of power. Of course, the vane pump may also be utilized in a wide range of power transmission and other fluid distribution applications. The vane pump of the invention may also use both hydrostatic and mechanical actuators to control the position of its containment ring or eccentric ring and hence, regulate the output of the pump. According to yet another aspect of the present invention, to prevent inlet flow restriction or cavitation, a valve may be provided to permit some of the pump outlet or discharge flow to bleed into the pump inlet to provide needed velocity energy to the fluid flow into the pump inlet. A system for lubrication of an engine using a fixed displacement pump for providing an engine speed input for controlling a second main variable displacement type oil pump and maintaining a target oil pressure in the oil pressure circuit. A solenoid valve is used for venting output of the fixed displacement pump to create a second target oil pressure characteristic or curve when desired.

Disclosed is an oil jet device for cooling a piston, including: an oil cooler 4 that is disposed upstream of an oil injection nozzle 8; an oil pump 5 that is disposed upstream of the oil cooler 4; a first switching adjustment valve 6 that is disposed between the oil injection nozzle 8 and the oil cooler 4 and adjusts a flow dividing ratio at which the cooling oil from the oil cooler 4 is distributed to the oil injection nozzle 8 side and to an oil pan side; and a control unit that has an oil quantity adjustment map 4 for switching the first switching adjustment valve 6 based on a piston temperature calculation map 20 for calculating the temperature of the piston 1 using detection values acquired respectively by a cooling water temperature sensor 35, a rotation speed sensor 36 and a load sensor 37.

To prevent a drop in a lubricating oil supply pressure in a valve train from occurring by disposing a lubricating oil supply path for the exclusive use of the valve train without allowing the lubricating oil to flow through an oil gallery, thereby securing a sufficient amount of supply of the lubricating oil in the valve train to enhance lubrication efficiency. A feed pump rotating with a crankshaft is disposed at a leftward end of the crankshaft. Lubricating oil supplied from the feed pump flows through an oil cooler and an oil filter. Part of the lubricating oil is supplied through a lubricating oil supply path to an oil gallery and to journals, crankpins, and the like of the crankshaft. The other part of the lubricating oil is supplied through lubricating oil supply paths for the exclusive use of the valve train.

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.

A pressure regulator for a power source may include a housing in fluid communication with a pressurized fluid line and a reservoir, and a pressure relief valve having an open position that creates a flow path between the pressurized fluid line and the reservoir, and a closed position. The pressure relief valve may open when an opening force exerted by pressurized fluid entering the housing overcomes a closing force acting on the pressure relief valve, allowing pressurized fluid to flow from the pressurized fluid line to the reservoir. The pressure regulator may also include a governor coupled to the pressure relief valve, wherein the governor is configured to regulate the pressure in the pressurized fluid line by selectively adjusting the closing force exerted on the pressure relief valve based on engine speed.

Disclosed are an oil pump control system and method, the oil pump control method including setting an initial target oil pressure of the oil pump based on a rotation speed of an engine or an oil temperature, determining a pressure compensation value by considering the target torque or target fuel quantity of the engine based on the initial target oil pressure, determining a final target oil pressure by adding the pressure compensation value to the initial target oil pressure, and feedback-controlling the oil pump so that current oil pressure measured in real time follows the final target oil pressure.

The invention provides a temperature control system for an engine, and a control method thereof, relates to the technical field of engine control, and aims at automatically adjusting the working temperature of the engine in the case of cold start-up or low-temperature running of the engine, thereby improving the working performance of the engine. The temperature control system for the engine comprises a parameter acquisition unit, an electronic control unit and a heating unit, wherein the working parameters of the engine are acquired through the parameter acquisition unit, the ratios of the working parameters of the engine to preset working parameters, are compared with a threshold value delta through the electronic control unit to obtain corresponding instructions, the turn-off and turn-on of the heating unit are controlled to automatically control the temperature of engine oil located in an oil channel of an engine oil nozzle, and the piston is heated by virtue of the heated engine oil to raise the working temperature of the engine. The temperature control system for the engine is used in the technical field of engine control.

A system and method are provided for increasing heating of engine oil during a cold start. In one example, engine oil is returned directly to the oil pump inlet, thus bypassing the sump. In this way, a smaller volume of oil receives more heat and is used for lubricating engine components during a cold start, thus providing reduced friction earlier than otherwise possible.

The invention relates to a lubricating system for a rotor engine and belongs to the field of engines. The lubricating system comprises a crankshaft, a bearing, a rotor, a sealing piece and an electronic control unit component, the crankshaft is processed with an eccentric shaft central oil way and an eccentric shaft radial oil way, and an oil way communicated with the crankshaft is radially processed on the inner side of the rotor; the sealing piece comprises a sealing piece substrate, a slider and oil needle integrated member, a one-way valve, a second sealing elastic device, a second sealing elastic device and an electromagnetic valve; a communicating oil way for supplying lubricating oil is processed from an eccentric shaft to the radial sealing piece, and the electromagnetic valve is controlled by the electronic control unit component to realize reliable supply of the lubricating oil. By the lubricating system, reliable and effective oil supply can be realized when the rotor engine rotates, and lubricating of between the eccentric shaft and a bearing and between the sealing piece and a cylinder can be ensured respectively, so that friction wear is reduced, reliable sealing is guaranteed, service life of each of the eccentric shaft, the bearing, the sealing piece and the cylinder is prolonged, and running performance of the rotor engine is improved.

The invention relates to a system for influencing the sliding properties of a sliding surface of a sliding pair by supplying the sliding surface with a regulating agent, wherein a plurality of different components can be used for producing the regulating agent, which is permanently achieved by Good functioning of the sliding pair, i.e. provided with a dynamic adjustment of the sliding properties of the sliding surfaces, wherein the sliding conditions of the sliding surfaces are continuously monitored and the regulator supplied to the sliding surfaces is optimized according to the current sliding conditions, the All the components of the regulator are delivered individually and metered to the sliding surface and blended there with one another, and the individual components of the regulator are delivered individually at multiple locations that can be selectively activated Carried out, wherein the activation of the individual delivery positions can take place as a function of the sliding situation. The invention also relates to the use of said system.