Method and device for determining surface temperature of wet clutch

Abstract

A method and device for determining the surface temperature of a wet clutch. The method includes: calculating the heat JC(k) generated by friction in the current period; calculating the heat JLC(k) absorbed by the oil flowing into the wet clutch in the current period; calculating the heat of the wet clutch itself in the current period The heat JCON(k) dissipated by the component; according to the first difference, calculate the variation of the surface temperature of the wet clutch in the current cycle; when k>1, according to the temperature of the surface of the wet clutch in the previous cycle and the variation of the surface temperature of the wet clutch in the current cycle, calculate the temperature TC(k) of the wet clutch surface in the current cycle; when k=1, according to the detected initial temperature of the wet clutch and the current cycle The change amount of the surface temperature of the wet clutch in the current period is used to calculate the temperature TC(k) of the surface of the wet clutch in the current period. Applying the method allows a more accurate determination of the temperature of the wet clutch surfaces.

Description

technical field [0001] The invention relates to the field of wet clutches, in particular to a method and device for determining the surface temperature of a wet clutch. Background technique [0002] In the transmission system of a car, the clutch is located between the engine and the transmission, responsible for cutting off and engaging the power of the engine, which can ensure the smoothness of the car when starting and smooth shifting. Generally, clutches can be divided into dry clutches and wet clutches. Among them, the dry clutch uses air to cool its surface temperature, while the wet clutch uses oil to cool its surface temperature. [0003] During the starting or shifting process of the car, the clutch needs to engage the power of the engine to complete the starting or shifting of the car. However, due to the speed difference between the engine and the clutch, the speed difference causes friction between the clutch and the engine and between the relevant parts inside...

AI Technical Summary

Problems solved by technology

[0005] However, in the above approach, the temperature sensor can only sense the temperature value at a certain position on the surface of the wet clutch, rather than the temperature of the entire surface of the wet clutch. Therefore, the above method is used to determine the temperature of the surface of the wet clutch. The temperature is not accurate enough

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