299results about "Lubrication pressure control" patented technology

A refrigerant circulation system configured to circulate oil-containing CO2 refrigerant includes a compressor, a motor, an oil tank, first to third passages, a flow regulating valve provided to the first and / or second passages, a motor rotational speed sensor, and a controller which controls the flow regulating valve(s). The refrigerant supplied from the compressor flows through the first passage, the oil supplied from the oil tank flows through the second passage. The motor includes a rotation shaft coupled to a rotor, and slide bearings which are lubricated using liquefied refrigerant compressed by the compressor and support the rotation shaft. The third passage communicates the first passage with the second passage and supplies to the slide bearings the refrigerant mixed with the oil. The controller controls the flow regulating valve according to the detected rotational speed to change a proportion of the oil in the refrigerant supplied to the slide bearings.

The invention provides a hierarchical dynamic control method and system for an oil pump fault mode, and the method comprises the steps: monitoring an actual oil pressure signal and a plurality of working condition parameter signals of an engine in real time, and carrying out the calculation based on the plurality of working condition parameter signals to obtain a target oil pressure signal; the difference value between the actual engine oil pressure signal and the target engine oil pressure signal is calculated, and whether the difference value is larger than a preset abnormal threshold value or not is judged; if the abnormal value is larger than the preset abnormal threshold value, it is judged that the oil pressure of the engine is abnormal, and whether the oil pressure abnormity belongs to the emergency situation or not is further judged; if the condition does not belong to the emergency condition, triggering early warning of a corresponding level according to the value of the difference value; if the non-highest-level early warning is triggered, the oil pressure state is detected again after preset time, and if the oil pressure is abnormal and still not recovered, a specific fault mode is diagnosed; and according to the diagnosed fault mode, the corresponding preset control strategy is called to control the fully variable oil pump, and the misjudgment rate is reduced.

The invention discloses a control system and method for an electronic oil pump, and relates to the technical field of electronic oil pump control. The system comprises a database, a positioning module, a damping regulation and control module, a double-tube coordination module and an oscillation monitoring module, through the synergistic effect, cross unstable intervals are recognized and avoided, damping and flow path switching are dynamically adjusted, and real-time monitoring and graded early warning are conducted, so that when the electronic oil pump is in the low-flow working condition or the engine pre-lubrication boundary state, the flow path switching is dynamically adjusted; the problems of pressure oscillation, discontinuous oil film thickness, unsmooth hydraulic execution and the like caused by impedance matching imbalance between a pump characteristic curve and a pipeline can be effectively avoided; therefore, the technical problem that in the prior art, an electronic oil pump is prone to oscillation under the boundary working condition is thoroughly solved, and the stability and reliability of the system are greatly improved.

A control method and control apparatus for an electronic oil pump, applied to a vehicle. The control method comprises: after an engine of a vehicle is started, detecting whether a pressure measurement device has a fault; when the pressure measurement device does not have a fault, on the basis of real-time oil state parameters and real-time working condition parameters of the engine, determining a target requested rotation speed corresponding to an electronic oil pump, wherein the real-time oil state parameters at least comprise a real-time oil temperature and a real-time oil pressure, and the real-time working condition parameters at least comprise a real-time engine rotation speed and a real-time engine torque; and, on the basis of the target requested rotation speed, controlling the oil pump rotation speed of the electronic oil pump.

The invention provides an engine oil pressure control method and device, a vehicle and a storage medium, and relates to the technical field of engine lubricating systems. According to the method, on the basis of the engine oil viscosity of the engine at the current moment, the surface movement speed of each friction pair in the engine and the preset minimum oil film thickness of each friction pair, the theoretical minimum engine oil pressure of a main oil duct is calculated, the system oil supply pressure is reduced as much as possible on the premise that lubrication safety is guaranteed, the driving power of an engine oil pump is remarkably reduced, and the service life of the engine is prolonged. The fuel economy of the engine can be improved; then, the theoretical minimum engine oil pressure is adjusted in combination with future working condition information of the vehicle, the target engine oil pressure is obtained, the target engine oil pressure has perspectiveness, upcoming load changes can be responded in advance, and the pressure fluctuation problem under the transient working condition is effectively relieved; and finally, according to the deviation between the target engine oil pressure and the actual engine oil pressure of the main oil duct, the displacement of the engine oil pump is adjusted, and closed-loop accurate control over the engine oil pressure is achieved.

The objective is to provide a hydraulic control device for an internal combustion engine that can prevent abnormal noises and suppress deterioration of fuel efficiency and exhaust emissions. [Solution] A hydraulic control device for an internal combustion engine comprising: a first oil passage for supplying oil from an oil pump to a component; a second oil passage connected to the first oil passage for supplying the oil from the oil pump to a chain tensioner; a control valve provided in the first oil passage on the component side of the position where the second oil passage is connected; and a control unit for controlling the opening degree of the control valve.

To make oil surely interpose between a rotor housing and a rotor even in cold starting.SOLUTION: An engine system 12 comprises: a rotary engine 14 having a rotor housing 16, side housings 18, and a rotor 20 that is housed in a rotor accommodation chamber surrounded by the rotor housing and the side housings and forms three working chambers 24, in which the rotary engine is driven by a starter generator 10 at the time of starting to increase in rotation speed, and drives the starter generator during operation; a water temperature sensor 64 for detecting a cooling water temperature of the rotary engine; and a PCM 84 and an SGCM 86, which are configured to control rotation speed of the starter generator at the time of engine starting. The PCM 84 and the SGCM 86 control the starter generator such that when the cooling water temperature at the time of rotary engine starting is relatively low, the rate of increase in engine rotation speed becomes low as compared with that when the cooling water temperature is relatively high.SELECTED DRAWING: Figure 7

The application relates to a lubrication control system, method and vehicle of a fuel nozzle, comprising an oil tank, an oil supply module, a pneumatic module and a control unit; the oil tank is connected to the oil supply module through a first oil supply pipeline; the oil supply module comprises an oil supply pipe and a plurality of oil storage chambers, one end of the oil supply pipe is connected to the oil storage chamber, the other end of the oil supply pipe is connected to the oil tank, and the output end of the oil storage tank is connected to the fuel nozzle; the pneumatic module is connected to the input end of the plurality of oil storage chambers through an air pipeline; the oil tank and the pneumatic module are both connected to the control unit, and the control unit is used for controlling the oil tank to supply oil to the oil supply module and controlling the pneumatic module to supply pressure to the oil storage chamber. The scheme provided by the application can regularly and quantitatively lubricate the fuel nozzle, prolong the service life of the fuel nozzle and improve the efficiency of the engine.

The present application relates to a kind of engine pre-oiling system and method, including main oil tank and auxiliary oil tank, main oil tank is sequentially connected with main oil passage by pipeline by oil pump;Auxiliary oil tank is connected with the outlet of oil pump by corresponding pipeline with main oil passage respectively, and the pipeline connected with the outlet of oil pump is equipped with first pre-oiling pump, and the pipeline connected with main oil passage is equipped with second pre-oiling pump, and heating device is equipped on auxiliary oil tank.By increasing auxiliary oil tank and the pipeline and oil pump matched, the oil passage pressure fluctuation when engine is started first or normally is used to inject lubricating oil into auxiliary oil tank, so that when the viscosity of engine oil is increased in low temperature environment, the lubricating oil in auxiliary oil tank can be heated by heating device and sent into main oil passage, to avoid the problem of dry grinding, lubrication and damage caused by the influence of oil viscosity in bearing region.

A cooling system is provided, comprising at least one unit to be cooled by a coolant, at least one pump arranged in a pump housing, a radiator connected to the unit to be cooled and to the at least one pump via corresponding coolant lines, and at least one coolant sump connected to the unit to be cooled, in which coolant is provided. The at least one pump is configured to draw coolant from the coolant sump and convey it via the radiator towards the unit to be cooled, or to convey it directly to the unit to be cooled, and wherein at least one bypass valve per pump is arranged in the pump housing such that coolant can be conveyed directly from the pump to the unit to be cooled.

The invention discloses an engine starting method, a vehicle and a computer storage medium, the engine starting method is applied to the vehicle, the vehicle comprises a lubricating system and an engine, the lubricating system comprises an engine oil pump, a first valve body and an oil pan used for storing engine oil, the oil pan and the engine both communicate with the engine oil pump, and a circulating oil way is formed; the first valve body is arranged on the engine oil pump and is configured to be capable of controlling the engine oil pump to maintain or stop conveying engine oil to the engine, and the engine starting method comprises the steps that whether the engine is in a limit cold starting state or not is judged; when the engine is in the limit cold start state, the first valve body is controlled to stop the engine oil pump from conveying engine oil to the engine; when the engine is not in the limit cold start state, the first valve body is controlled to enable the engine oil pump to maintain conveying engine oil to the engine. According to the engine starting method, the rotation resistance of the engine crankshaft can be reduced, and therefore the low-temperature starting capacity of the engine can be improved.

The invention discloses a control system for lubricating a diesel generating set, and relates to the technical field of diesel generating set lubrication control, the system comprises a control cabinet, the diesel generating set and M lubricating oil pre-supply pumps, the control cabinet is used for controlling the lubricating oil pre-supply pumps when it is determined that the diesel generating set is shut down, under the condition that it is judged that the lubricating oil pre-supply pump capable of providing the lubricating function exists, one lubricating oil pre-supply pump is controlled to be started; and under the condition that it is judged that the lubricating oil pre-supply pump capable of providing the lubricating function does not exist, the diesel generating set is controlled to be started, the diesel generating set is lubricated through the machine belt lubricating oil pump, and under the condition that it is determined that the lubricating oil pre-supply pump capable of providing the lubricating function exists, the diesel generating set is controlled to be shut down, and one lubricating oil pre-supply pump is started. The problems that in the prior art, when an unlubricated diesel generating set is started, lubrication fails, the cooling capacity is reduced, and the cleaning function is lost are solved, and it is guaranteed that lubrication of the diesel generating set is efficiently completed.

The invention discloses a novel control system and method for preventing oil pumping of a supercharger, and the system comprises a supercharger body which comprises an oil inlet; a sensing unit, wherein the sensing unit is connected to the supercharger body; the analysis and control unit is electrically connected with the sensing unit; one end of the engine oil pipeline unit is communicated with the oil inlet; the opening degree adjusting unit is annularly arranged on the pipe wall of the engine oil pipeline unit, and the opening degree adjusting unit is electrically connected with the analysis and control unit; the opening degree adjusting unit can change the size of the inner diameter of the engine oil pipeline and adjust the opening degree of the engine oil pipeline unit. The oil inlet opening can be intelligently controlled, and engine oil is prevented from penetrating through a cabin due to the influence of air pressure to cause engine faults.

This application relates to methods and systems for lubricating devices. Methods and systems for a compressed natural gas fuel rail are provided. In one example, a system includes a device having a first volume for containing compressed natural gas and a second volume for containing a lubricant, the first volume and the second volume being disposed in a single housing and separated by a barrier. Lubricant flow from the second volume to the first volume can be regulated by regulating a pressure of the second volume such that a pressure differential between the second volume and the first volume is increased to increase lubricant flow or the pressure differential is decreased to decrease lubricant flow.

The present invention provides an engine control device that can further reduce engine noise and vibration (NV) (i.e., improve the quietness of the engine). [Solution] The ECU 50 estimates the oil film thickness for each cylinder based on the crank angular velocity, engine load, and oil temperature corresponding to the expansion stroke of each cylinder, and corrects the ignition timing of cylinders whose estimated oil film thickness is thinner than a predetermined value.

This application discloses a method, apparatus, device, and storage medium for measuring engine oil level. In the field of engine technology, the method for measuring engine oil level is disclosed. The method is applied to an engine oil level measuring unit, including an oil dipstick tube, an oil dipstick, an electronically controlled valve, a temperature sensor, and a temperature indicator light. The oil dipstick tube contains a first channel and a second channel forming a U-shaped tube structure. The electronically controlled valve is located in the first channel, the temperature sensor is located at the bottom of the first channel, and the temperature indicator light is located at the top of the dipstick tube. The method includes: when the engine is in a first stopped state, controlling the electronically controlled valve to open and close according to a preset method; when the opening and closing operation of the electronically controlled valve ends, adjusting the working state of the temperature indicator light according to the engine oil temperature; and when the temperature indicator light is illuminated, measuring the engine oil level according to the dipstick. This method ensures the accuracy and repeatability of the engine oil level measurement.

This invention relates to a lubricating oil composition comprising or resulting from the admixing of: a) 50 to 99 mass % of one or more base oils; b) 0.1 to 15 mass % of one or more functionalized olefin copolymer having an Mn of from 10,000 to 35,000 g / mol; c) 0.1 to 20 mass % of one or more detergents wherein the detergent comprises at least one calcium detergent having a TBN of more than 100 mg KOH / g; at least one calcium detergent having a TBN of 100 mg KOH / g or less; and at least one magnesium detergent, where the difference in the TBN's for the Ca detergents is at least 100 mg KOH / g; d) 0.01 to 40 mass % of one or more dispersants wherein the dispersants comprise at least one borated dispersant and at least one non borated dispersant; e) 0.01 to 20 of mass % sulfurized fatty acid ester; f) 0.01 to 5 mass % of one or more amine or phenol based antioxidants; and g) 0.001 to 15 mass % of molybdenum containing compound, where the lubricating oil composition has: 1) a sulfated ash content of 0.9 mass % or less; 2) a Mack T-11 final soot %@15 cSt of 6.7% or more; 3) a total base number of 5 to 30 mg KOH / g; 4) HTCBT of copper level increase of 20 ppm or less; 5) T-13 IR peak EOT of 40 abs / cm or less; and 6) Cam wear outlet of 45 μm or less.

A hybrid electric propulsion system for an aircraft is provided that includes a thermal engine, an electric motor, a gearbox, an electric power storage unit, a propulsion unit, and a controller. The thermal engine has a main oil pump configured to be driven by the thermal engine. The gearbox is in communication with the thermal and electric motors. The propulsion unit includes a propeller having propeller blades, and a pitch change mechanism. The controller is in communication with the thermal and electric motors, the propulsion unit, and a memory storing instructions. The instructions when executed cause the controller to control the electric motor to operate using electrical power from the electric power storage unit to cause the main oil pump to actuate and produce a flow of engine oil to the pitch change mechanism for a period of time sufficient to feather the propeller blades.

The invention discloses an intelligent engine pre-starting control system, relates to the technical field of engine electric control, and solves the technical problems that the existing manual starting electric pre-feeding oil pump control mode is not flexible, and the starting time cannot be controlled according to the engine oil pressure and temperature, so that the service life of a starting motor is influenced. The system comprises a CAN instrument, an ECU, an engine oil pressure and temperature sensor and a whole vehicle wire harness, the CAN instrument is electrically connected with the ECU through the whole vehicle wire harness, the engine oil pressure and temperature sensor is electrically connected with the ECU through the whole vehicle wire harness, and the CAN instrument collects the real-time engine oil pressure output by the engine oil pressure and temperature sensor through the whole vehicle wire harness and sends the real-time engine oil pressure to the ECU through the whole vehicle wire harness. The ECU collects the real-time engine oil temperature output by the engine oil pressure and temperature sensor through the whole vehicle wire harness. Accurate control over the electric oil pre-supply pump is achieved, and the control flexibility of the electric oil pre-supply pump is improved.

This invention discloses an apparatus and method for controlling a vehicle's oil pump, which can control the speed of the oil pump. The apparatus includes a controller configured to control the speed of the oil pump based on temperature information of the motor and oil, as well as speed and torque information of the motor. When the vehicle is in motion, the controller checks whether the temperature of the motor or oil is higher than or equal to a first set temperature. When the temperature of the motor or oil is higher than or equal to the first set temperature, the controller controls the speed of the oil pump to a maximum speed value. When the temperature of the motor or oil is lower than the first set temperature, the controller calculates a control speed value and controls the speed of the oil pump to the calculated control speed value.

An engine oil metering system suitable for a rotor engine of a low-altitude aircraft belongs to the technical field of engine oil discharge of the rotor engine of the low-altitude aircraft and is characterized by comprising an electronic engine oil pump, an engine oil metering valve is connected to an oil outlet of the engine oil pump, and an engine oil pressure sensor is connected to an oil outlet of the engine oil metering valve. The engine oil pressure sensor is connected with a pressure nozzle, a nozzle of the pressure nozzle is fixedly connected with an engine rotor cylinder, the engine oil output amount in the rotor engine cylinder can be accurately controlled, the engine oil burning phenomenon of an engine is relieved while the rotor lubricating requirement is met, and the oil inlet amount in the rotor engine cylinder under different working conditions is accurately controlled.

The present invention relates to an electric oil pump and, more specifically, to an electric oil pump and an electric device which can measure the temperature of oil by including a temperature sensor unit on a suction flow path connecting an oil suction port and a pump chamber provided in a housing, can implement stable support with respect to a shaft, use winding coils connected for each phase winding coil in a three-phase motor, and minimize a connection route between a controller and a final end of the winding coils to simplify the structure and contribute to cost reduction. The present invention provides an electric oil pump comprising: an oil suction port provided in a housing; a pump chamber provided in the housing; a suction flow path connecting the pump chamber and the suction port; a temperature sensor unit disposed on the suction port or the suction flow path to measure the temperature of oil before flowing into the pump chamber; and a control module including a double journal bearing, a motor connected to a shaft connected to the pump, and a substrate, wherein the motor comprises a rotor and a stator, the stator includes three-phase windings of U-phase, V-phase, and W-phase, the windings of each phase are provided in plurality, the windings of the same phase are connected in series to each other, and a final line of each winding connected in series is connected to the control module, one for each phase.

This invention discloses an electromagnetic control valve for a diesel engine lubrication system, relating to the field of electromagnetic valves. The invention features a simple structure. By adjusting the fit between the components of the electromagnetic control valve, an oil drain port is provided at the front end of the valve sleeve, and two annular grooves are provided on the circumference, forming a first oil outlet and a second oil outlet at the second annular groove. Simultaneously, the dimensions of the two oil outlets are adjusted so that the amount of lubricating oil discharged from the oil pump regulating chamber through the second oil outlet is greater than the amount of lubricating oil flowing into the oil pump regulating chamber from the oil inlet through the first oil outlet. Compared to existing electromagnetic hydraulic control valves, this invention offers a wider range of hydraulic oil quantity adjustment, higher precision, and more sensitive response. Even when the electromagnetic valve fails due to power loss, it can still automatically open under oil pressure to adjust the oil pump output.

This invention discloses a closed-loop control system for a solenoid valve of a variable displacement oil pump in an engine, relating to the field of pressure control technology. The system includes: matching a target oil pressure based on engine operating condition information; determining the equivalent viscosity of the oil through the real-time dynamic evolution characteristics of oil temperature and pressure in the hydraulic medium state, and generating oil pressure regulation control reference information; a duty cycle adjustment module, which dynamically adjusts the response sensitivity of the pressure regulation loop based on the oil pressure regulation control reference information and the equivalent viscosity of the oil to adapt to the changes in motion damping of the hydraulic medium under different temperature conditions, obtaining a target control duty cycle signal for the solenoid valve; and a chatter overlay module, which matches a corresponding chatter frequency and amplitude according to the equivalent viscosity of the oil, and loads the chatter frequency and amplitude onto the target control duty cycle signal of the solenoid valve to generate a solenoid valve drive control command; thereby improving engine lubrication consistency and fuel economy.

An engine (10) includes a cylinder block (12) having formed therein a plurality of cylinders (16), a main oil gallery (30), and a spray jet gallery (32). A cross-hole (36) is fluidly connected to the main oil gallery (30) and extends to the spray jet gallery (32). Oil spray jets (38) are each fluidly connected to one of a plurality of oil feed holes (34) fluidly connected to the spray jet gallery (32). An oil admission valve (50), which can be hydraulically actuated or electrically actuated, is supported in the cylinder block (12) and movable between a closed position to block the spray jet gallery (32) and each of the oil feed holes (34) from the cross-hole (36), and an open position.

To provide a coolant circulation system to lubricant a slide bearing of a motor with a coolant containing oil, in which the content ratio of the oil in the coolant is changed suitably.SOLUTION: A coolant circulation system 100 to circulate a coolant in which CO2 contains oil includes a motor 1 including a slide bearing 14 that lubricates using a coolant compressed with a compressor 3 and supports a rotary shaft 13, an oil tank 6 to store oil, a coolant passage 21 where the coolant from the compressor flows, an oil passage 25 where the oil from the oil tank flows, a coolant passage 24 that supplies a coolant in which the oil from the oil passage is mixed with the coolant from the coolant passage to the slide bearing, and a first flow rate regulation valve 30 and an oil flow rate regulation valve 33 provided at the coolant passage and the oil passage, respectively. A control device 80 controls these flow rate regulation valves so that the oil content ratio in the coolant changes in accordance with the number of rotations of the motor.SELECTED DRAWING: Figure 3

Disclosed is a bearing housing structure and method for automatically adjusting oil inlet characteristics. The bearing housing structure includes a bearing housing, an oil inlet limiting block, a guide cylinder and a spring. The bearing housing is provided with an oil inlet chamber, a compression chamber and an oil outlet. The guide cylinder is provided with an oil inlet flow channel and a spring chamber, where the oil inlet flow channel includes four sub-flow channels, and the spring chamber is respectively communicated with the oil inlet flow channel and the oil inlet chamber. The spring is movably arranged between the spring chamber and the compression chamber, the oil inlet limiting block is threadedly connected to the bearing housing, the oil inlet limiting block is provided with an oil inlet, and an end of the oil inlet limiting block is in contact with a tapered end of the guide cylinder.

The application discloses a pressure regulating device and a diesel engine, and belongs to the technical field of pressure regulation. The pressure regulating device comprises a valve body, a plunger and an elastic assembly. The valve body is provided with a first accommodating cavity, an oil inlet hole and an oil outlet hole which are in communication with each other, and the plunger is arranged in the first accommodating cavity. The plunger can move along the axial direction of the valve body to make the oil inlet hole and the oil outlet hole communicate or disconnect. The elastic assembly is arranged in the first accommodating cavity and comprises a first spring and a second spring. The first spring is connected with the valve body and the plunger along the axial direction respectively, and the first spring can be stretched or compressed along the axial direction. The second spring is arranged around the outer circumferential side of the first spring and abuts against the valve body and the plunger along the axial direction respectively. The second spring can be compressed along the axial direction. The first spring inserted in the second spring is combined with the first spring capable of being stretched or compressed along the axial direction and the second spring capable of being compressed along the axial direction, so that the overall structure is compact, the pressure regulating range is increased, the pressure regulating device can quickly respond, and the working stability is improved.

The present application relates to oil pressure control of a variable camshaft timing system, and provides methods and systems for regulating the oil pressure supplied to an engine and a VCT system in response to conditions of the variable cam timing (VCT) system. In one example, a method includes regulating the oil pressure based on engine speed, engine load, and engine oil temperature, and increasing the oil pressure to an upper threshold oil pressure for a duration of the transition in response to a request to transition the VCT system during a particular engine operating condition.