A self-learning method and system for wet clutch pressure-current characteristics

Abstract

The invention discloses a self-learning method and system for pressure-current characteristics of a wet clutch. The method comprises the following steps: setting a plurality of self-learning current points for the pressure-current characteristics of the clutch in advance; setting the main oil pressure of the clutch as a first pressure value while meeting the self-learning condition for the pressure-current characteristics of the clutch; respectively applying respective learning current points to a solenoid valve, thereby acquiring practical pressure values of the clutch at all the self-learning current points; acquiring the pressure values corresponding to the respective self-learning current points according to the stored pressure-current characteristics of the clutch; taking a difference value between the practical pressure value of the clutch at each self-learning current point and the corresponding pressure value acquired according to the stored pressure-current characteristics of the clutch as a pressure deviation value at each self-learning current point; and utilizing the pressure deviation value at each self-learning current point to adjust the stored pressure-current characteristics of the clutch. According to the method disclosed by the invention, the clutch pressure control precision can be promoted.

Description

technical field [0001] The invention relates to the field of clutch control, in particular to a self-learning method and system for pressure-current characteristics of a wet clutch. Background technique [0002] The wet clutch automatic transmission is more and more favored by users due to its simple and easy-to-operate characteristics. The working principle of the wet clutch is as follows: During the clutch engagement process, the pressure oil enters the side of the clutch cylinder through the oil passage, pushing the piston to The other side moves and presses the friction plate, so that the driving side and the driven side of the clutch realize synchronous movement. During the oil filling process of the clutch, the pressure relief hole is sealed by the barrier, so there is no pressure oil leakage; while in the oil discharge stage, the barrier no longer blocks the pressure relief hole under the action of centrifugal force, and the pressure relief hole is opened, so that the...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a self-learning method and system for wet clutch pressure-current characteristics, which solves the problem that there are certain differences in the PI characteristic curves of different electromagnetic valves in the prior art, which leads to the problem of affecting the clutch pressure control accuracy

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