A method and system for adaptive control of oil filling for a wet clutch

Abstract

The invention discloses an oil charging self-adaptive control method and a system for a wet clutch. The method comprises the following steps: a present clutch oil charging state is obtained under a peristalsis working condition; when the present clutch oil charging state is an oil charging control state, a present clutch target pressure is obtained; in a preset adjusting time length, the present clutch target pressure is adjusted to a semi-joint point of the clutch; after the adjustment is finished, in a preset integral control time length, a correction parameter of an oil charging compensation value is obtained according to the relation between a difference value of the semi-joint point and actual pressure of the clutch and the correction parameter of the oil charging compensation value; the oil charging compensation value is corrected according to the correction parameter of the oil charging compensation value to obtain a corrected oil charging compensation value; and target pressure of the clutch is adjusted according to the corrected oil charging compensation value. The method can adjust the target pressure value of the clutch to the semi-joint point in the stated time, and can prevent such problems as vehicle impact or even suppressed flameout of an engine.

Description

technical field [0001] The invention relates to the field of clutch control, in particular to an oil filling self-adaptive control method and system for a wet clutch. Background technique [0002] The wet clutch is widely used in automatic transmissions, and its working principle is as follows: During the clutch engagement process, the pressure oil enters one side of the clutch oil cylinder through the oil passage, and pushes the piston to move to the other side to press the friction plate, so that the clutch is active. / Slave edge for synchronous motion. 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 clutch is active / Driven side to achieve separation. [0003] Creeping condition refers to the condition in whi...

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Problems solved by technology

[0004] The present invention provides an oil-filling self-adaptive control method and system for a wet clutch, which solves the problem that in the prior art, the pressure of the clutch cannot be ensured to quickly reach the half-joint point, and the half-joint point will change, resulting in insufficient pressure control accuracy of the clutch The problem

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