Engine intelligent lubricating system, control method and automobile

Abstract

The application relates to an engine intelligent lubricating system, a control method and an automobile, which comprises an oil pan provided with an oil heater and a first oil temperature sensor, the oil pan is connected with an electric control oil pump, an OTC electromagnetic valve is connected with the electric control oil pump at the inlet, a first outlet of the OTC electromagnetic valve is used for being connected with an engine lubricating part, the first outlet of the OTC electromagnetic valve is provided with a second oil temperature sensor, an oil cooler is connected with a second outlet of the OTC electromagnetic valve at the inlet, and the outlet of the oil cooler is used for being connected with the engine lubricating part. The EECU is used for controlling the opening and closing of the oil heater of the oil pan and the state of the OTC valve, the oil flow through the oil cooler is controlled, the oil temperature input to the engine lubricating part meets the target setting, the response is fast, the engine always works at a proper oil temperature, and the engine is kept in good lubrication.

Description

Technical Field

[0001] This invention relates to the field of engine technology, specifically to an intelligent engine lubrication system, control method, and automobile. Background Technology

[0002] Currently, in order to ensure the normal operation of the engine, it is necessary to lubricate the surfaces of the relatively moving parts inside the engine. The function of the lubrication system is to continuously deliver a sufficient quantity of clean engine oil at an appropriate temperature to the friction surfaces of all transmission components when the engine is running, and form an oil film between the friction surfaces to achieve liquid friction, thereby reducing frictional resistance, reducing power consumption, and reducing wear of parts, so as to improve the reliability and durability of the engine.

[0003] In related technologies, the engine lubrication system oil temperature is generally regulated by an oil cooler, and a mechanical oil temperature control valve is used to control the oil flow direction and distribute the oil flow to the oil cooler for cooling. The oil temperature is generally monitored before the oil cooler.

[0004] However, when using a mechanical oil thermostat to regulate oil flow, the oil temperature change is relatively slow compared to the engine's actual lubrication temperature requirements. This slow response prevents the engine from consistently operating at the appropriate oil temperature, leading to poor engine lubrication. Excessively high oil temperature causes the oil to thin, resulting in poor lubrication and accelerated wear of the friction pairs. Conversely, excessively low oil temperature causes it to thicken, increasing frictional resistance and increasing engine power consumption. Summary of the Invention

[0005] This application provides an intelligent engine lubrication system, control method, and automobile, which can solve the problem that the oil temperature change under the mechanical temperature regulation method in the related technology is relatively slow and cannot respond quickly, so that the engine always works at the appropriate oil temperature, resulting in poor engine lubrication.

[0006] In a first aspect, embodiments of this application provide an intelligent engine lubrication system, comprising: an oil pan with an oil heater and a first oil temperature sensor, the oil pan being connected to an electronically controlled oil pump; an OTC solenoid valve with its inlet connected to the electronically controlled oil pump, a first outlet of the OTC solenoid valve being connected to an engine lubrication point, and a second oil temperature sensor being provided at the first outlet of the OTC solenoid valve; an oil cooler with its inlet connected to the second outlet of the OTC solenoid valve, and an outlet of the oil cooler being connected to the engine lubrication point; and an EECU (engine control unit) signal-connected to the oil heater, the electronically controlled oil pump, the OTC solenoid valve, the first oil temperature sensor, and the second oil temperature sensor; the EECU is used to control the start / stop of the oil heater and the opening degree of the OTC solenoid valve according to the oil temperature.

[0007] In conjunction with the first aspect, in one embodiment, the oil cooler is connected to an electronically controlled water pump, a water flow valve and a water temperature sensor are installed on the pipeline between the electronically controlled water pump and the oil cooler, an electric grille is installed on one side of the oil pan, and the water flow valve, the water temperature sensor and the electric grille are all signal-connected to the EECU.

[0008] In conjunction with the first aspect, in one embodiment, the first outlet of the OTC solenoid valve is provided with a first oil pressure sensor, and the first outlet of the OTC solenoid valve is connected to a PCJ solenoid valve and a brake solenoid valve. The PCJ solenoid valve is used to connect to the piston cooling part, and the brake solenoid valve is used to connect to the braking system. The first oil pressure sensor, the PCJ solenoid valve, and the brake solenoid valve are all signal-connected to the EECU.

[0009] Secondly, embodiments of this application provide a control method for an intelligent engine lubrication system, which includes the following steps: acquiring the oil temperature detected by a second oil temperature sensor; and controlling the start / stop of the oil heater and the opening degree of the OTC solenoid valve using an EECU based on the oil temperature.

[0010] In conjunction with the second aspect, in one embodiment, the oil cooler is connected to an electrically controlled water pump, and a water flow valve and a water temperature sensor are installed on the pipeline between the electrically controlled water pump and the oil cooler. An electric grille is installed on one side of the oil pan. The water flow valve, the water temperature sensor, and the electric grille are all signal-connected to the EECU. The control method further includes: acquiring the water temperature detected by the water temperature sensor; and controlling the start / stop of the oil heater, the opening degree of the OTC solenoid valve, the opening degree of the water flow valve, and the opening degree of the electric grille using the EECU based on the oil temperature and the water temperature.

[0011] In conjunction with the second aspect, in one embodiment, the optimal operating range of the engine oil temperature is between a first target temperature and a second target temperature; the control method includes: when the oil temperature is lower than the first target temperature but higher than the coolant temperature, using the EECU to control the second outlet of the OTC solenoid valve to close, the oil heater to open, the coolant flow valve to close, and the electric grille to close; when the oil temperature is lower than the first target temperature but lower than the coolant temperature, using the EECU to control the second outlet of the OTC solenoid valve to open, the oil heater to open, the coolant flow valve to open, and the electric grille to close; when the oil temperature is higher than the first target temperature, lower than the second target temperature, and .... The EECU controls the second outlet of the OTC solenoid valve to open, the oil heater to close, the water flow valve to open, and the electric grille to close, and adjusts the opening degree of the water flow valve. When the oil temperature is higher than the first target temperature, lower than the second target temperature, and higher than the water temperature, the EECU controls the second outlet of the OTC solenoid valve to open, the oil heater to close, the water flow valve to open, and the electric grille to open, and adjusts the opening degree of the water flow valve. When the oil temperature is higher than the second target temperature and higher than the water temperature, the EECU controls the second outlet of the OTC solenoid valve to open, the oil heater to close, the water flow valve to open, and the electric grille to open, and adjusts the opening degree of the water flow valve to be fully open.

[0012] In conjunction with the second aspect, in one embodiment, when the engine oil temperature is higher than the first target temperature, lower than the second target temperature, and lower than the water temperature, for every 1°C increase in engine oil temperature compared to the first target temperature, the water flow valve is controlled to decrease from a fully open state by 10%, and when the engine oil temperature is the second target temperature, the water flow valve is in a fully closed state; when the engine oil temperature is higher than the first target temperature, lower than the second target temperature, and higher than the water temperature, for every 1°C increase in engine oil temperature compared to the first target temperature, the opening of the water flow valve is controlled to increase by 10%, and when the engine oil temperature is the second target temperature, the water flow valve is in a fully open state.

[0013] In conjunction with the second aspect, in one embodiment, a first oil pressure sensor is provided at the first outlet of the OTC solenoid valve, and a PCJ solenoid valve is connected to the first outlet of the OTC solenoid valve. The PCJ solenoid valve is used to connect to the piston cooling part, and both the first oil pressure sensor and the PCJ solenoid valve are signal-connected to the EECU. The control method further includes: when the engine speed is lower than a set value, controlling the PCJ solenoid valve to close using the EECU; and when the engine speed is higher than the set value, controlling the PCJ solenoid valve to open using the EECU.

[0014] In conjunction with the second aspect, in one embodiment, the first outlet of the OTC solenoid valve is connected to a brake solenoid valve, the brake solenoid valve being used to connect to the braking system, and the brake solenoid valve being signal-connected to the EECU; the control method further includes: when the engine is in a non-braking state, using the EECU to control the brake solenoid valve to close; when the engine starts braking, using the EECU to control the brake solenoid valve to open, and adjusting the opening degree of the brake solenoid valve.

[0015] Secondly, embodiments of this application provide an automobile that includes the aforementioned intelligent engine lubrication system.

[0016] The beneficial effects of the technical solutions provided in this application include:

[0017] This invention provides an intelligent engine lubrication system, control method, and automobile. After the engine starts, the system detects the oil temperature in the oil pan and the oil temperature input to the engine lubrication points. The EECU controls the opening and closing of the oil heater in the oil pan and controls the state of the OTC valve to control the oil flow through the oil cooler. This ensures that the oil temperature input to the engine lubrication points meets the target setting, with a fast response, so that the engine always operates at a suitable oil temperature and maintains good lubrication. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the intelligent lubrication system for engines provided in an embodiment of the present invention.

[0020] Numbering on the map:

[0021] 1. Oil pan; 2. Oil heater; 3. Electronic oil pump; 4. OTC solenoid valve; 5. Oil cooler; 6. EECU; 7. First oil temperature sensor; 8. Electronic water pump; 9. Water flow valve; 10. Water temperature sensor; 11. Electric grille; 12. Oil filter; 13. Second oil temperature sensor; 14. First oil pressure sensor; 15. PCJ solenoid valve; 16. Brake solenoid valve; 17. Piston cooling area; 18. Engine lubrication area; 19. Second oil pressure sensor; 20. Third oil pressure sensor. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0023] This application provides an intelligent engine lubrication system, control method, and automobile, which can solve the problem that the oil temperature change under the mechanical temperature regulation method in the related technology is relatively slow and cannot respond quickly, so that the engine always works at the appropriate oil temperature, resulting in poor engine lubrication.

[0024] Figure 1 This invention provides an intelligent engine lubrication system, which may include: an oil pan 1, which is equipped with an oil heater 2 and a first oil temperature sensor 7, and the oil pan 1 is connected to an electronically controlled oil pump 3; an OTC solenoid valve 4, the inlet of which is connected to the electronically controlled oil pump 3, the electronically controlled oil pump 3 can precisely adjust the oil output according to the needs of engine lubrication, braking, and cooling, the first outlet of the OTC solenoid valve 4 is used to connect to an engine lubrication point 18, and the first outlet of the OTC solenoid valve 4 is equipped with a second oil temperature sensor 13; an oil cooler 5, the inlet of which is connected to the second outlet of the OTC solenoid valve 4, and the outlet of the oil cooler 5 is used to connect to the engine lubrication point 18; and an EECU 6, which is signal-connected to the oil heater 2, the electronically controlled oil pump 3, the OTC solenoid valve 4, the first oil temperature sensor 7, and the second oil temperature sensor 13; the EECU 6 is used to control the start and stop of the oil heater 2 and the opening degree of the OTC solenoid valve 4 according to the oil temperature. By detecting the oil temperature in the oil pan and the oil temperature input to the engine lubrication points, and using the EECU6 to control the opening and closing of the oil heater 2 in the oil pan, as well as the state of the OTC solenoid valve 4, the flow rate of oil flowing through the oil cooler 5 is controlled. This ensures that the oil temperature input to the engine lubrication points 18 meets the target setting, with a fast response, so that the engine always operates at a suitable oil temperature and maintains good lubrication.

[0025] The engine lubrication system includes an oil pan 1 for storing engine oil, with a first oil temperature sensor 7 and an oil heater 2 installed in the oil pan 1. An electronically controlled oil pump 3 draws oil from the oil pan 1, pressurizes it, and then supplies it to the engine lubrication points 18. An OTC solenoid valve 4 (oil temperature control solenoid valve) is installed after the electronically controlled oil pump 3 to control the oil flow direction after the pump. An oil cooler 5 is installed after the OTC solenoid valve 4 for cooling and heating the oil, and an oil filter 12 is installed for filtering and cleaning the oil. A second oil temperature sensor 13 and a first oil pressure sensor 14 are installed after the oil filter 12 to monitor the oil temperature and pressure supplied to the engine lubrication points. The ECU receives information such as oil temperature, oil pressure, coolant temperature, engine speed, and throttle opening, and controls the opening and status of the OTC, PCJ, and brake solenoid valves, as well as the opening and closing of the oil heater 2 and the electric grille 11.

[0026] See Figure 1 As shown, in some embodiments, the oil cooler 5 is connected to an electronically controlled water pump 8, and a water flow valve 9 and a water temperature sensor 10 are installed on the pipeline between the electronically controlled water pump 8 and the oil cooler 5. An electric grille 11 is installed on one side of the oil pan 1, and the water flow valve 9, the water temperature sensor 10 and the electric grille 11 are all signal-connected to the EECU 6.

[0027] In this embodiment, a water temperature sensor 10 is installed at the water inlet of the oil cooler 5 to monitor the water temperature; an electric grille 11 is installed in front of the engine oil pan 1 to control the airflow cooling from the front of the vehicle. It can be closed to block the wind from the front of the vehicle or opened to guide the wind towards the front of the vehicle to cool the oil pan. The water temperature sensor 10 detects the temperature of the coolant input to the oil cooler 5, and the EECU 6 controls the opening and closing of the electric grille 11, as well as the opening of the water flow valve 9, to control the temperature of the oil flowing through the oil cooler 5. This ensures that the oil temperature input to the engine lubrication points 18 meets the target setting, with a fast response, allowing the engine to always operate at a suitable oil temperature and maintain good lubrication.

[0028] The relevant technical solutions use a fixed-displacement oil pump. The output oil pressure of the fixed-displacement oil pump is generally linearly related to the engine speed, and it cannot provide output according to the actual lubrication pressure requirements of various parts of the engine. In actual use, a larger oil flow rate needs to be designed to form excess pressure in the lubrication system, which will increase the frictional power consumption of the engine. In this application, the first outlet of the OTC solenoid valve 4 is provided with a first oil pressure sensor 14. The first outlet of the OTC solenoid valve 4 is connected to a PCJ solenoid valve 15 and a brake solenoid valve 16. The PCJ solenoid valve 15 is used to connect to the piston cooling part 17, and the brake solenoid valve 16 is used to connect to the braking system. The first oil pressure sensor 14, the PCJ solenoid valve 15, and the brake solenoid valve 16 are all signal-connected to the EECU 6.

[0029] In this embodiment, a PCJ solenoid valve 15 is installed in the lubrication circuit after the oil filter 12 to control the oil flow to the piston cooling nozzle, and a first oil pressure sensor 14 is installed after the PCJ solenoid valve 15 to monitor the piston cooling oil pressure; a brake solenoid valve 16 is installed in the brake oil circuit after the oil filter 12 to control the brake oil flow and pressure, and a first oil pressure sensor 14 is installed after the brake solenoid valve 16 to monitor the brake oil pressure; after the engine starts, the EECU6 detects the oil pressure and oil temperature after the oil filter, and adjusts the oil pressure of the engine lubrication system by controlling the opening of the OTC solenoid valve 4, the opening of the PCJ solenoid valve 15, and the opening of the brake solenoid valve 16, so as to meet the optimal lubrication pressure requirements of various parts of the engine and minimize the engine friction power consumption.

[0030] See Figure 1 As shown, this embodiment of the invention also provides a control method for an intelligent engine lubrication system, which may include the following steps: acquiring the oil temperature detected by the second oil temperature sensor 13; and controlling the start / stop of the oil heater 2 and the opening degree of the OTC solenoid valve 4 using the EECU 6 based on the oil temperature. In this embodiment, by detecting the oil temperature in the oil pan and the oil temperature input to the engine lubrication points, and by using the EECU 6 to control the opening and closing of the oil heater 2 in the oil pan, and controlling the state of the OTC solenoid valve 4, the flow rate of oil flowing through the oil cooler 5 is controlled, so that the oil temperature input to the engine lubrication points 18 meets the target setting, the response is fast, and the engine always operates at a suitable oil temperature, thus maintaining good lubrication of the engine.

[0031] See Figure 1As shown, in some embodiments, the oil cooler 5 is connected to an electrically controlled water pump 8, and a water flow valve 9 and a water temperature sensor 10 are installed on the pipeline between the electrically controlled water pump 8 and the oil cooler 5. An electric grille 11 is installed on one side of the oil pan 1. The water flow valve 9, the water temperature sensor 10, and the electric grille 11 are all signal-connected to the EECU 6. The control method further includes: acquiring the water temperature detected by the water temperature sensor 10; and controlling the start / stop of the oil heater 2, the opening degree of the OTC solenoid valve 4, the opening degree of the water flow valve 9, and the opening degree of the electric grille 11 using the EECU 6 based on the oil temperature and the water temperature. In this embodiment, the water temperature sensor 10 detects the temperature of the coolant input to the oil cooler 5, and the EECU 6 controls the opening and closing of the electric grille 11 and the opening of the water flow valve 9 to control the temperature of the oil flowing through the oil cooler 5. This ensures that the oil temperature input to the engine lubrication part 18 meets the target setting, with a fast response, so that the engine always works at a suitable oil temperature and maintains good lubrication.

[0032] See Figure 1 As shown, in some embodiments, the optimal operating range of the engine oil temperature is between a first target temperature and a second target temperature; the control method includes: when the oil temperature is lower than the first target temperature but higher than the water temperature, using the EECU6 to control the second outlet of the OTC solenoid valve 4 to close, the oil heater 2 to open, the water flow valve 9 to close, and the electric grille 11 to close; when the oil temperature is lower than the first target temperature but lower than the water temperature, using the EECU6 to control the second outlet of the OTC solenoid valve 4 to open, the oil heater 2 to open, the water flow valve 9 to open, and the electric grille 11 to close; when the oil temperature is higher than the first target temperature, lower than the second target temperature, and lower than the water temperature, using the EECU6 to control the OTC solenoid valve 4 to open, the oil heater 2 to open, the water flow valve 9 to open, and the electric grille 11 to close; when the oil temperature is higher than the first target temperature, lower than the second target temperature, and lower than the water temperature, using the EECU6 to control the OTC solenoid valve 4 to open, the oil heater 2 to open, the water flow valve 9 to open, and the electric grille 11 to close. The second outlet of the TC solenoid valve 4 is opened, the oil heater 2 is closed, the water flow valve 9 is opened, and the electric grille 11 is closed, and the opening degree of the water flow valve 9 is adjusted; when the oil temperature is higher than the first target temperature, lower than the second target temperature, and higher than the water temperature, the EECU 6 controls the second outlet of the OTC solenoid valve 4 to open, the oil heater 2 to close, the water flow valve 9 to open, and the electric grille 11 to open, and adjusts the opening degree of the water flow valve 9; when the oil temperature is higher than the second target temperature and higher than the water temperature, the EECU 6 controls the second outlet of the OTC solenoid valve 4 to open, the oil heater 2 to close, the water flow valve 9 to open, and the electric grille 11 to open, and adjusts the opening degree of the water flow valve 9 to be fully open.

[0033] See Figure 1As shown, in some embodiments, when the oil temperature is higher than the first target temperature, lower than the second target temperature, and lower than the water temperature, for every 1°C increase in oil temperature compared to the first target temperature, the water flow valve 9 is controlled to decrease from fully open by 10%, and when the oil temperature is the second target temperature, the water flow valve 9 is fully closed; when the oil temperature is higher than the first target temperature, lower than the second target temperature, and higher than the water temperature, for every 1°C increase in oil temperature compared to the first target temperature, the opening of the water flow valve 9 is controlled to increase by 10%, and when the oil temperature is the second target temperature, the water flow valve 9 is fully open.

[0034] See Figure 1 As shown, in some embodiments, the first outlet of the OTC solenoid valve 4 is provided with a first oil pressure sensor 14, and the first outlet of the OTC solenoid valve 4 is connected to a PCJ solenoid valve 15. The PCJ solenoid valve 15 is used to connect to the piston cooling section 17. The first oil pressure sensor 14 and the PCJ solenoid valve 15 are both signal-connected to the EECU 6. The control method further includes: when the engine speed is lower than a set value, using the EECU 6 to control the PCJ solenoid valve 15 to close; when the engine speed is higher than the set value, using the EECU 6 to control the PCJ solenoid valve 15 to open.

[0035] See Figure 1 As shown, in some embodiments, the first outlet of the OTC solenoid valve 4 is connected to a brake solenoid valve 16, which is used to connect to the braking system and is signal-connected to the EECU 6. The control method further includes: when the engine is in a non-braking state, using the EECU 6 to control the brake solenoid valve 16 to close; when the engine starts braking, using the EECU 6 to control the brake solenoid valve 16 to open and adjust the opening degree of the brake solenoid valve 16.

[0036] This invention also provides a vehicle that includes the above-described intelligent engine lubrication system. The vehicle may also implement any embodiment of the above-described intelligent engine lubrication system, which will not be elaborated here.

[0037] Specifically, the intelligent engine lubrication system, control method, and engine oil temperature control principle provided in this embodiment of the invention are as follows:

[0038] After the engine starts, the EECU6 detects the oil temperature in the oil pan 1 and the oil temperature after the oil filter 12. It controls the oil flow through the oil cooler 5 by controlling the start and stop of the oil heater 2, controlling the state of the OTC solenoid valve 4, and controlling the water flow valve 9 to control the water flow into the oil cooler 5, so as to ensure that the oil temperature after the engine oil filter 12 meets the engine oil temperature target.

[0039] The optimal range for engine oil temperature is between the first target temperature and the second target temperature.

[0040] 1) When the oil temperature after the oil filter is lower than the first target temperature but higher than the water temperature, the EECU6 controls the OTC solenoid valve 4 to be in state a, and the oil after the oil pump directly enters the oil filter 12; the EECU6 controls the oil heater 2 to turn on the heating function, the electric grille 11 remains closed, and the water flow valve 9 is closed.

[0041] 2) When the oil temperature after the oil filter is lower than the first target temperature and lower than the water temperature, the EECU6 controls the water flow valve 9 to open and adjust it to the fully open state. The EECU6 controls the OTC solenoid valve 4 to be in state b, so that the oil flows through the oil cooler 5 to be cooled before entering the oil filter 12. At the same time, the EECU6 controls the oil heater 2 to turn on the heating function, and the electric grille 11 remains closed, so that the oil temperature rises quickly to the first target temperature.

[0042] 3) When the oil temperature after the oil filter is higher than the first target temperature but lower than the second target temperature and lower than the water temperature, the EECU6 controls the OTC solenoid valve 4 to be in state b, so that the oil flows through the oil cooler 5 for cooling before entering the oil filter 12. The EECU6 controls the water flow valve 9 to open and adjusts the target opening size (for every 1°C increase in oil temperature above the first target temperature, the water flow valve 9 decreases its opening by 10% from the fully open state; when the oil temperature is the second target temperature, the water flow valve 9 is fully closed). At the same time, the EECU6 controls the oil heater 2 and the electric grille 11 to remain closed, so that the oil temperature is maintained between the first and second target temperatures.

[0043] 4) When the oil temperature after the oil filter is higher than the first target temperature, lower than the second target temperature, and higher than the water temperature, the EECU6 controls the OTC solenoid valve 4 to be in state b, so that the oil flows through the oil cooler 5 for cooling before entering the oil filter 12. The EECU6 controls the water flow valve 9 to open and adjusts the target opening size (for every 1°C that the oil temperature is higher than the first target temperature, the opening of the water flow valve 9 increases by 10%. When the oil temperature is the second target temperature, the solenoid valve is fully open). At the same time, the electric grille 11 is controlled to open, introducing air intake from the front of the vehicle to air cool the oil pan 1.

[0044] 5) When the oil temperature after the oil filter is higher than the second target temperature and higher than the water temperature, the EECU6 controls the OTC solenoid valve 4 to be in state b, so that the oil flows through the oil cooler 5 to be cooled before entering the oil filter 12. The EECU6 controls the water flow valve 9 to open and adjusts the target opening degree to the fully open state. At the same time, it controls the electric grille 11 to open, introducing air intake at the front of the vehicle to air cool the oil in the oil pan 1.

[0045] The intelligent engine lubrication system, control method, and engine oil pressure control principle for engine oil temperature in automobiles provided in this embodiment of the invention are as follows:

[0046] After the engine starts, the EECU6 detects the oil pressure and temperature after the oil filter. By controlling the opening of the OTC solenoid valve 4, the PCJ solenoid valve 15, and the brake solenoid valve 16, it adjusts the oil pressure of the engine lubrication system to meet the optimal lubrication pressure requirements of various parts of the engine and minimize the engine friction power consumption.

[0047] (1) When the engine is at low speed, the piston cooling demand is 0, and the EECU6 controls the PCJ solenoid valve 15 to be closed. When the engine speed increases and the piston has a cooling demand, the EECU6 controls the PCJ solenoid valve 15 to open. Depending on the engine speed and the piston cooling demand, the EECU6 controls and adjusts the opening of the PCJ solenoid valve 15 to meet the optimal cooling demand of the piston and ensure that the oil pressure of the piston cooling nozzle is within the target pressure range (1.5-3.5 bar). Among them, the second oil pressure sensor 19 is used to detect the oil pressure input to the piston cooling part 17 and adjusts the opening of the PCJ solenoid valve 15 according to the oil pressure to meet the optimal cooling demand of the piston; the third oil pressure sensor 20 is used to detect the oil pressure input to the braking system and adjusts the opening of the brake solenoid valve 16 according to the oil pressure to meet the optimal cooling demand of the brake.

[0048] 2) When the engine is not braking, the brake solenoid valve 16 remains closed; when the engine starts braking, the EECU6 controls the brake solenoid valve 16 to open and adjusts the opening of the brake solenoid valve 16 to ensure that the brake oil pressure meets the target pressure range (1.5-2.5 bar).

[0049] 3) Based on the lubrication pressure and braking pressure requirements of various parts under different engine operating conditions, the electronic control oil pump 3 is calibrated to form a MAP diagram. The EECU6 adjusts the speed of the electronic control oil pump 3 according to information such as engine speed and throttle opening, so as to control the oil flow rate output by the oil pump, and thus control the oil pressure level after the oil filter to meet the requirements of the engine.

[0050] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0051] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An intelligent lubrication system for an engine, characterized in that, It includes: An oil pan (1) is provided with an oil heater (2) and a first oil temperature sensor (7), and the oil pan (1) is connected to an electronically controlled oil pump (3). The OTC solenoid valve (4) has its inlet connected to the electronically controlled oil pump (3), and its first outlet is connected to the engine lubrication part (18). The first outlet of the OTC solenoid valve (4) is provided with a second oil temperature sensor (13). An oil cooler (5) has its inlet connected to the second outlet of the OTC solenoid valve (4), and the outlet of the oil cooler (5) is used to connect to the engine lubrication part (18). EECU (6), whose signal is connected to the oil heater (2), the electronically controlled oil pump (3), the OTC solenoid valve (4), the first oil temperature sensor (7) and the second oil temperature sensor (13). The oil cooler (5) is connected to an electric water pump (8). A water flow valve (9) and a water temperature sensor (10) are installed on the pipeline between the electric water pump (8) and the oil cooler (5). An electric grille (11) is installed on one side of the oil pan (1). The water flow valve (9), the water temperature sensor (10) and the electric grille (11) are all signal connected to the EECU (6). Based on the oil temperature and the water temperature detected by the water temperature sensor (10), the EECU (6) controls the start and stop of the oil heater (2), the opening degree of the OTC solenoid valve (4), the opening degree of the water flow valve (9), and the opening degree of the electric grille (11).

2. The intelligent engine lubrication system as described in claim 1, characterized in that: The first outlet of the OTC solenoid valve (4) is provided with a first oil pressure sensor (14). The first outlet of the OTC solenoid valve (4) is connected to a PCJ solenoid valve (15) and a brake solenoid valve (16). The PCJ solenoid valve (15) is used to connect to the piston cooling part (17). The brake solenoid valve (16) is used to connect to the braking system. The first oil pressure sensor (14), the PCJ solenoid valve (15) and the brake solenoid valve (16) are all signal connected to the EECU (6).

3. A control method for an engine intelligent lubrication system as described in any one of claims 1 to 2, characterized in that, It includes the following steps : Obtain the oil temperature detected by the second oil temperature sensor (13); Based on the oil temperature and the water temperature, the EECU (6) controls the start and stop of the oil heater (2), the opening degree of the OTC solenoid valve (4), the opening degree of the water flow valve (9), and the opening degree of the electric grille (11).

4. The control method as described in claim 3, characterized in that: The optimal operating range of the engine oil temperature is between the first target temperature and the second target temperature; The control method includes: When the oil temperature is lower than the first target temperature and higher than the water temperature, the EECU (6) controls the second outlet of the OTC solenoid valve (4) to close, the oil heater (2) to open, the water flow valve (9) to close, and the electric grille (11) to close. When the oil temperature is lower than the first target temperature and lower than the water temperature, the EECU (6) controls the second outlet of the OTC solenoid valve (4) to open, the oil heater (2) to open, the water flow valve (9) to open and the electric grille (11) to close. When the oil temperature is higher than the first target temperature, lower than the second target temperature, and lower than the water temperature, the EECU (6) controls the second outlet of the OTC solenoid valve (4) to open, the oil heater (2) to close, the water flow valve (9) to open, and the electric grille (11) to close, and adjusts the opening degree of the water flow valve (9); When the oil temperature is higher than the first target temperature, lower than the second target temperature, and higher than the water temperature, the EECU (6) controls the second outlet of the OTC solenoid valve (4) to open, the oil heater (2) to close, the water flow valve (9) to open, and the electric grille (11) to open, and adjusts the opening degree of the water flow valve (9); When the oil temperature is higher than the second target temperature and higher than the water temperature, the EECU (6) controls the second outlet of the OTC solenoid valve (4) to open, the oil heater (2) to close, the water flow valve (9) to open and the electric grille (11) to open, and adjusts the opening degree of the water flow valve (9) to be fully open.

5. The control method as described in claim 4, characterized in that: When the oil temperature is higher than the first target temperature, lower than the second target temperature, and lower than the water temperature, for every 1°C increase in the oil temperature compared to the first target temperature, the water flow valve (9) is controlled to decrease by 10% from the fully open state. When the oil temperature is the second target temperature, the water flow valve (9) is in the fully closed state. When the oil temperature is higher than the first target temperature, lower than the second target temperature, and higher than the water temperature, the opening of the water flow valve (9) is increased by 10% for every 1°C increase in oil temperature compared to the first target temperature. When the oil temperature is the second target temperature, the water flow valve (9) is fully open.

6. The control method as described in claim 5, characterized in that, The first outlet of the OTC solenoid valve (4) is provided with a first oil pressure sensor (14), and the first outlet of the OTC solenoid valve (4) is connected to a PCJ solenoid valve (15). The PCJ solenoid valve (15) is used to connect to the piston cooling part (17). The first oil pressure sensor (14) and the PCJ solenoid valve (15) are both signal connected to the EECU (6). The control method further includes: When the engine speed is lower than the set value, the PCJ solenoid valve (15) is closed by the EECU (6); When the engine speed is higher than the set value, the PCJ solenoid valve (15) is opened by the EECU (6).

7. The control method as described in claim 5, characterized in that, The first outlet of the OTC solenoid valve (4) is connected to a brake solenoid valve (16), which is used to connect to the braking system and is signal-connected to the EECU (6). The control method further includes: When the engine is not in a braking state, the EECU (6) controls the brake solenoid valve (16) to close. When the engine starts braking, the EECU (6) controls the brake solenoid valve (16) to open and adjust the opening degree of the brake solenoid valve (16).

8. A car, characterized in that, It includes the engine intelligent lubrication system as described in any one of claims 1 to 2.

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