Wet clutch hydraulic system thermal resistance network model and average temperature estimation method

Abstract

The invention discloses a wet clutch hydraulic system thermal resistance network model and an average temperature estimation method in the field of wet clutch temperature measurement. All elements andenvironments in a wet clutch hydraulic system to be equivalent to different nodes, and two nodes with heat exchange are connected through a connection lineto form a thermal resistance network model.The method comprises the steps of establishing a wet clutch hydraulic system thermal resistance network model, establishing a node thermal state equation, solving the model and the like. According tothe invention, the problems of poor hysteresis quality and universality of the existing wet clutch temperature measurement method are solved; all elements of the wet clutch hydraulic system are simplified into nodes, a system thermal working condition mathematical model is established, the average temperature of the wet clutch and lubricating oil is estimated accordingly, and the method has the advantages of being good in universality and high in reliability and can be widely applied to actual production.

Description

technical field [0001] The invention relates to the field of wet clutch temperature measurement, in particular to a thermal resistance network model and an average temperature estimation method of a wet clutch hydraulic system. Background technique [0002] In the comprehensive transmission of heavy vehicles, the most prone to failure and damage is the wet clutch. The most important reason for the failure of the clutch is that the temperature of the friction pair is too high, which leads to the warping and deformation of the friction elements. Therefore, during the clutch engagement process, the calculation of the temperature rise of friction elements has always been a technical problem to be solved urgently. [0003] Considering the assembly process and cost factors, an oil temperature sensor is usually used to detect the temperature of the oil thrown out of the clutch lubricating oil outlet as the clutch temperature, and then realize the measurement of the wet clutch temp...

AI Technical Summary

Problems solved by technology

[0005] However, offline establishment of a prediction model for the actual temperature of the wet clutch requires a large amount of experimental data as support, which will consume a lot of manpower, material and financial resources

Moreover, this method has poor versatility. To measure the temperature of different types of wet clutches, different actual temperature prediction models need to be established, which will limit its wide application in actual production.

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