Dual-clutch automatic speed transmission synchronizer and self-adapting control method for gear switch

Abstract

The adaptive control process of a double-clutch automatic derailleur synchronizer and gear shifting is that the torque mathematical model of the target car motor is designed; the control curve of synchronizer is determined according to the program of gear shifting rule; the fact whether the opening a of an accelerograph is greater or less than the accelerograph valve A is estimated; if the opening a of the accelerograph is greater than the accelerograph A, the control mode of operating mode of urgent acceleration is actualized; if the opening a of the accelerograph is less than the accelerograph A, the control mode of operating mode of cyclic running is actualized. The invention has the advantages that the control rule of synchronizer and gear shifting of various work conditions can be in selfadaptive chosen in real time according to the degree of the opening of the accelerograph, the control rule can make sure that the rotate speed of a DCT gear is in safe range when the car is accelerated quickly, and that the times of separation and joint of synchronizer is reduced when the cyclic operating mode is actualized, which saves energy consumption and prolongs the service life of parts.

Description

technical field [0001] The invention relates to a control method, in particular to a double-clutch automatic transmission synchronizer and an adaptive control method for shifting gears. Background technique [0002] The main goal of dual clutch transmission (Dual clutch transmission, referred to as DCT) synchronizer and gear switching control is to minimize the number of times of separation and engagement under the premise of correctly realizing its corresponding functions. [0003] It can be seen from the working principle of DCT that DCT adopts the method of pre-joining the synchronizer. But when the synchronizer starts to pre-engage, there is no fixed control method at present. At present, the strategy of engaging the synchronizer of the next gear immediately according to the movement trend of the vehicle after the gear shift is completed. Since the speed of the vehicle changes in a relatively large range during driving, this will inevitably lead to frequent engagement o...

AI Technical Summary

Problems solved by technology

At present, the strategy of engaging the synchronizer of the next gear immediately according to the movement trend of the vehicle after the gear shift is completed. Since the speed of the vehicle changes in a relatively large range during driving, this will inevitably lead to frequent engagement of the synchronizer, which will not only cause instantaneous impact, but also Will affect the life of the synchronizer

Images