Double-clutch switching control method for vehicle double-clutch automatic transmission

Abstract

The invention relates to the field of clutch control, in particular to a double-clutch switching control method for a vehicle double-clutch automatic transmission. A double-clutch automatic transmission gear shifting experiment platform is used, analysis and calculation are carried out according to theories, a gear shifting process of the double-clutch automatic transmission under various workingconditions with the optimal gear shifting quality is found, and changing curves on the rotating speed of an engine, the rotating speed of a first input shaft, the rotating speed of a second input shaft, the pressure of a first clutch and the pressure of a second clutch in the process are recorded; and by adjusting the duty ratio of electromagnetic valve engaging and separating through the clutchesin the double-clutch automatic transmission, the sum of the transmission torque of the two clutches of the front-sequence clutch and the rear-sequence clutch in the gear-shifting process is matched with the torque of the engine, the impact degree and the friction work in combination of the double clutches can be effectively reduced, the rapid smooth and safe switching between the double clutchescan be realized, and stable and safe power transmission can be completed.

Description

technical field [0001] The invention belongs to the technical field of clutch control, and more specifically relates to a dual-clutch switching control method of a dual-clutch automatic transmission. Background technique [0002] The shifting process of the dual clutch automatic transmission is realized through the mutual switching of the two clutches; there must be a part where the work of the two clutches overlaps during the clutch switching process. If the overlap between the two clutches is too large, the situation of "dual gearing" will occur, which will have a greater impact on the engine and the transmission system, and in severe cases will cause the engine to stall. If the overlap of the two clutches is too small, there will be a small amount of power. In the event of an interruption, the quality of the shifting is adversely affected. Therefore, how to precisely control the matching timing of the two clutches is the core issue in the control strategy of the shifting...

AI Technical Summary

Problems solved by technology

If the overlap between the two clutches is too large, the situation of "dual gearing" will occur, which will have a greater impact on the engine and the transmission system, and in severe cases will cause the engine to stall. If the overlap of the two clutches is too small, there will be a small amount of power. Interrupted conditions that adversely affect shift quality

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