Optimized clutch control method based on wet clutch

Abstract

The invention discloses an optimized clutch control method based on a wet clutch, belonging to the technical field of automobile transmissions. The optimized clutch control method comprises the steps of: carrying out meshing control optimization and release control optimization for a plurality times to obtain upper limit pressure values to be optimized and lower limit pressure values to be optimized, carrying out summation respectively, averaging to obtain a final optimized upper limit pressure value and a final optimized lower limit pressure value, and storing in an EEPROM (Electrically Erasable Programmable Read-Only Memory) space of a transmission control unit (TCU) to realize optimized clutch control. In the invention, dynamic factors such as clutch abrasion, temperature influences and the like are comprehensively considered so as to ensure that the control of the critical point of the clutch on beginning to transmit the torque of an engine is always maintained in an optimal state.

Description

technical field [0001] The invention relates to a method in the technical field of automobile transmissions, in particular to an optimized clutch control method based on a wet clutch. Background technique [0002] The so-called wet clutch means that the friction contact surface of the clutch friction plate during the sliding friction process is the friction of the liquid and semi-liquid interface. When the adhesion between the oil molecule layer and the friction surface is greater than the shear force generated by sliding, the clutch will be Start delivering engine torque. And this adhesion is related to various dynamic factors such as the surface roughness of the clutch itself, the characteristics of the friction material, the structure and shape of the friction plate, the characteristics of the oil, the driving temperature, and the wear of the clutch. In simple terms, when each clutch is initially manufactured, due to The deviation of machinery and materials is different ...

AI Technical Summary

Problems solved by technology

However, it is impossible to adjust the appropriate Touch point in a direct and rapid response to the dynamic factors that affect the later stage such as clutch wear. Then, with the increase of driving mileage and the influence of ambient temperature, the effect of clutch control will gradually deteriorate.

[0006] After searching the existing technology, it is found that most of the control methods for the influence of clutch wear and ambient temperature changes on the clutch touch point use the method of controlling the speed difference between the input and output ends of the clutch, such as the article "Experimental Research on the Half Engagement Point of the Clutch in the Start Process" mentioned, but this method is only applicable to AMT and other models, and the scope of application is limited

For gearboxes with traditional parallel-shaft mechanical structures, such as dual-clutch gearboxes DCT, etc., the speed of the input shaft of the gearbox at the output end of the clutch is affected by the oil when there is no gear engaged. When the dynamic resistance torque is large, the basic speed is 0rpm, so this method cannot be used as the touch point judgment benchmark

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