Upshifting control method and system for wet type double-clutch automatic gearbox

Abstract

The invention discloses an upshifting control method and system for a wet type double-clutch automatic gearbox. The upshifting control method comprises the steps that when wet type double clutches enter a gear shifting torque alternating stage, the torque of the combination clutch is controlled to be increased by the first fixed slope till the torque of the combination clutch is larger than or equal to the static torque of an engine, and sliding friction PI control is conducted on the separation clutch at the same time; then whether the difference value between the rotation speed of an input shaft and the rotation speed of the engine is larger than or equal to the preset value is judged; in addition, when the difference value between the rotation speed of the input shaft and the rotation speed of the engine is larger than or equal to the preset value, it is indicated that the current engine rotation speed drops too low, and impact is prone to being produced if sliding friction control is still conducted; at the moment, the torque of the separation clutch is controlled to be decreased by the second fixed slope; the processes are repeated till the separation clutch is separated; and in this way, the impact phenomenon at the torque alternating stage in the accelerator stepping power upshifting process in the prior art can be effectively avoided, and the driving experience degree is improved.

Description

technical field [0001] The invention relates to the field of clutch control, in particular to an upshift control method and system for a wet dual-clutch automatic transmission. 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] Cars equipped with wet-type dual-clutch...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides an upshift control method and system of a wet dual-clutch automatic transmission, which solves the problem in the prior art that most shocks occur at the stage of torque alternation in the process of stepping on the accelerator and power upshifting

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