Self-adaptation control method for torque of automatic transmission clutch

Abstract

The invention provides a self-adaptation control method for torque of an automatic transmission clutch. The self-adaptation control method can ensure the optimal control over the torque of the clutchduring the gear shifting process; as for the power upshifting process, the oil filling phase, the torque phase, the speed phase and the locking stage are sequentially performed, according to the inputshaft rotating speed change rate, the gear shifting time, the current gear position and the target gear position in the oil filling phase and the torque phase in the gear shifting process, the engaged clutch pressure correction amount is dynamically adjusted, and therefore on the basis of guaranteeing the gear shifting time, the input shaft rotating speed change rate is reduced, the gear shiftingshock is reduced, and the gear shifting quality is improved.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to a shift control method of an automatic transmission, in particular to an adaptive control method for engaging clutch torque during the shift process of an automatic transmission. Background technique [0002] During a shifting process, the clutch pressure increases and finally presses the main and driven ends of the clutch, and the separation clutch pressure decreases to zero. In this way, a shifting process is completed. During the shifting process, due to the internal mechanical structure of the clutch A series of problems, such as the wear and tear of the ATF oil, the aging of the ATF oil performance, and the degradation of the sealing ring, make the clutch pressure in the torque control stage require an adaptive control method to meet the clutch pressure control to achieve sufficient accuracy requirements. If the engaged clutch pressure increases too quickly, the input shaf...

AI Technical Summary

Problems solved by technology

If the engaged clutch pressure increases too quickly, the input shaft speed changes drastically, causing shift shock

Long shift times if on-clutch pressure builds too slowly

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