Engine oil thermostat control method

Abstract

The invention discloses an engine oil thermostat control method, relates to an engine oil thermostat, and solves the technical problem that the existing engine oil thermostat and engine oil cooler mounting structure and temperature control mode cannot stably control the temperature of engine oil in a main oil duct. The method comprises the steps that an oil inlet of an engine oil thermostat is connected with an oil outlet of an engine oil filter, an oil outlet of the engine oil thermostat is connected with an oil inlet of an engine oil cooler, and a cooling liquid inlet of the engine oil cooler is connected with a cooling liquid outlet of the engine oil thermostat; a cooling liquid inlet of the engine oil thermostat is connected with a cooling liquid pipeline; and the real-time temperature of engine oil in a main oil duct is obtained, and a cooling liquid side valve of the engine oil thermostat is controlled according to the real-time temperature of the engine oil. Accurate control over the engine oil temperature of the main oil gallery is achieved.

Description

Technical Field

[0001] This invention relates to an oil thermostat, and more specifically, to an oil thermostat control method. Background Technology

[0002] Currently, the oil thermostat in range-extended engines of new energy vehicles is typically installed at the inlet of the oil cooler fins to control the flow of oil into the cooler. If the oil temperature is at a medium to low temperature, below the initial opening temperature of the oil thermostat, the low-temperature oil bypasses the cooler and returns to the engine's main oil passages and lubrication of various moving parts after passing through the oil filter. When the oil temperature reaches the initial opening temperature, the thermostat opens, allowing the high-temperature oil to enter the cooler for cooling. However, vehicle operating speeds and load rates fluctuate significantly, while the heat dissipation area of ​​water-cooled oil coolers and the coolant flow rate in the water circuit are fixed. Therefore, the current design suffers from unstable control of the main oil passage oil temperature and large fluctuations in oil temperature. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an oil thermostat control method to address the shortcomings of the prior art, thereby solving the technical problem of unstable oil temperature control in the main oil passage caused by the existing oil thermostat and oil cooler installation structure and temperature control method.

[0004] The present invention discloses an oil thermostat control method, wherein the method comprises connecting the oil inlet of the oil thermostat to the oil outlet of the oil filter, connecting the oil outlet of the oil thermostat to the oil inlet of the oil cooler, connecting the coolant inlet of the oil cooler to the coolant outlet of the oil thermostat, and connecting both the coolant inlet and outlet of the oil thermostat to a coolant pipeline; acquiring the real-time temperature of the engine oil in the main oil passage, and controlling the coolant-side valve of the oil thermostat according to the real-time oil temperature.

[0005] As a further improvement, the method for controlling the coolant-side valve of the oil thermostat according to the real-time oil temperature is as follows: an opening temperature range is set, and when the real-time oil temperature is within the opening temperature range, the oil thermostat is activated, and the opening degree of the coolant-side valve of the oil thermostat is calibrated according to the real-time oil temperature.

[0006] Furthermore, as the real-time temperature of the engine oil increases, the opening degree of the coolant-side valve of the engine oil thermostat increases.

[0007] Furthermore, when the real-time oil temperature is lower than the minimum value of the opening temperature range, the coolant side valve of the oil thermostat is closed.

[0008] Furthermore, when the real-time oil temperature is greater than or equal to the maximum value of the opening temperature range, the opening degree of the coolant side valve of the oil thermostat is set to the maximum opening degree.

[0009] Beneficial effects The advantages of this invention are: This invention connects the oil inlet of the oil cooler to the oil outlet of the oil pan, the oil inlet of the oil thermostat to the oil outlet of the oil filter, and the oil outlet of the oil thermostat to the oil inlet of the oil cooler. It also connects the coolant inlet of the oil cooler to the coolant outlet of the oil thermostat, and the coolant inlet of the oil thermostat to a coolant pipeline. By acquiring the real-time oil temperature in the main oil passage and controlling the coolant-side valve of the oil thermostat based on this real-time oil temperature, the invention reduces the impact of vehicle operating speed and engine load on the cooling effect of the oil cooler, achieving precise control of the oil temperature in the main oil passage. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the connection structure of the oil temperature regulating and oil cooler of the present invention; Figure 2 This is a schematic diagram illustrating the real-time oil temperature-oil thermostat opening calibration of the present invention.

[0011] The components are: 1-engine body, 2-oil pan, 3-engine main oil passage, 4-oil filter, 5-oil thermostat, 6-oil cooler, and 7-oil pump. Detailed Implementation

[0012] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention. See Figures 1-2 The present invention provides a method for controlling an oil thermostat, wherein the method is as follows: Figure 1 As shown, the oil outlet of the oil pump 3 is connected to the oil inlet of the oil filter 4, the oil inlet of the oil thermostat 5 is connected to the oil outlet of the oil filter 4, the oil outlet of the oil thermostat 5 is connected to the oil inlet of the oil cooler 6, and the oil outlet of the oil cooler 6 is connected to the main oil passage of the engine 7. The oil in the main oil passage of the engine flows to lubricate the various moving parts of the engine.

[0013] The coolant inlet of the oil cooler 6 is connected to the coolant outlet of the oil thermostat 5. Both the coolant inlet of the oil thermostat 5 and the coolant outlet of the oil cooler 6 are connected to the coolant pipeline. The real-time temperature of the engine oil in the main oil passage 3 is obtained, and the coolant-side valve of the oil thermostat 5 is controlled based on this real-time oil temperature. A valve is installed inside the oil cooler 6. The valve is located between the coolant inlet and the coolant outlet of the oil cooler 6. By positioning the oil thermostat 5 at the oil outlet of the oil cooler 6, continuous cooling of the medium-low temperature engine oil is achieved, preventing the oil temperature from continuously rising and causing damage to engine components due to insufficient cooling of the high-temperature oil.

[0014] The method of controlling the engine oil coolant based on real-time engine oil temperature involves setting an open temperature range. When the real-time engine oil temperature falls within this range, the oil thermostat 5 is activated. The opening of the coolant-side valve of the oil thermostat 5 is calibrated according to the real-time engine oil temperature. Controlling the engine oil coolant based on real-time engine oil temperature can improve engine efficiency: after the engine oil temperature stabilizes, the engine operating resistance is lower, fuel economy is better, and power output is smoother. It reduces damage to internal engine parts (such as bearings and pistons) caused by overheating or undercooling of the engine oil, extending component life. The oil thermostat can quickly respond to temperature changes, providing timely protection during aggressive driving or cold starts, adapting to complex operating conditions.

[0015] like Figure 2 As shown, the opening degree of the coolant-side valve of the oil thermostat 5 increases with the increase of the real-time oil temperature. When the real-time oil temperature is less than the minimum value of the opening temperature range, the oil thermostat 5 is closed. When the real-time oil temperature is greater than or equal to the maximum value of the opening temperature range, the opening degree of the coolant-side valve of the oil thermostat 5 is set to the maximum opening degree.

[0016] In this embodiment, the opening temperature range is 101℃~110℃. When the real-time oil temperature is 101℃, the coolant-side valve opening of the calibrated oil thermostat 5 is 10% of the maximum opening of the coolant-side valve; when the real-time oil temperature is 102℃, the coolant-side valve opening of the calibrated oil thermostat 5 is 20% of the maximum opening of the coolant-side valve; when the real-time oil temperature is 103℃, the coolant-side valve opening of the calibrated oil thermostat 5 is 30% of the maximum opening of the coolant-side valve; when the real-time oil temperature is 104℃, the coolant-side valve opening of the calibrated oil thermostat 5 is 40% of the maximum opening of the coolant-side valve; when the real-time oil temperature is 105℃, the coolant-side valve opening of the calibrated oil thermostat 5 is... The calibrated oil thermostat 5 is set to open at 50% of its maximum opening when the real-time oil temperature is 106°C; at 107°C, the calibrated oil thermostat 5 is set to open at 70% of its maximum opening when the real-time oil temperature is 108°C; at 109°C, the calibrated oil thermostat 5 is set to open at 90% of its maximum opening when the real-time oil temperature is 110°C; and at 110°C, the calibrated oil thermostat 5 is set to open at its maximum opening when the real-time oil temperature is 106°C.

[0017] In this embodiment, the oil thermostat 5 is an electronic thermostat, which includes a temperature sensor and a valve. The temperature sensor is located in the oil circuit, and the valve is located in the coolant circuit. When using the electronic thermostat, the temperature sensor monitors the oil temperature in the main oil passage and uses this temperature to control the valve opening.

[0018] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A method for controlling an oil thermostat, characterized in that, The method involves connecting the oil inlet of the oil thermostat (5) to the oil outlet of the oil filter (4), connecting the oil outlet of the oil thermostat (5) to the oil inlet of the oil cooler (6), connecting the coolant inlet of the oil cooler (6) to the coolant outlet of the oil thermostat (5), and connecting both the coolant inlet of the oil thermostat (5) and the coolant outlet of the oil cooler (6) to the coolant pipeline; obtaining the real-time oil temperature in the main oil passage (3) of the engine, and controlling the coolant side valve of the oil thermostat (5) according to the real-time oil temperature.

2. The oil thermostat control method according to claim 1, characterized in that, The method for controlling the coolant side valve of the oil thermostat (5) according to the real-time oil temperature is as follows: set an opening temperature range, and when the real-time oil temperature is within the opening temperature range, start the oil thermostat (5) and calibrate the opening degree of the coolant side valve of the oil thermostat (5) according to the real-time oil temperature.

3. The oil thermostat control method according to claim 1, characterized in that, As the real-time temperature of the engine oil increases, the opening degree of the coolant-side valve of the engine oil thermostat (5) increases.

4. The oil thermostat control method according to claim 1, characterized in that, When the real-time oil temperature is less than the minimum value of the open temperature range, the coolant side valve of the oil thermostat (5) is closed.

5. The oil thermostat control method according to claim 1, characterized in that, When the real-time oil temperature is greater than or equal to the maximum value of the opening temperature range, the opening degree of the coolant side valve of the oil thermostat (5) is set to the maximum opening degree of the coolant side valve.

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