Dynamic self-adaptive method of shift fork force in dual-clutch automatic transmission

Abstract

The invention discloses a double-clutch type automatic transmission fork shifting gear engaging force dynamic self-adapting method. The fork shifting is divided into a plurality of stages during the gear shifting process. The double-clutch type automatic transmission fork shifting gear engaging force dynamic self-adapting method comprises the following steps of (1) obtaining ranges of a maximum value and a minimum value of a preset shifting fork movement speed at different stages during fork shifting gear engaging; (2) computing a shifting fork real-time movement speed and confirming a maximum value and a minimum value of the shifting fork movement speed at the different stages during the fork shifting gear engaging; (3) comparing the maximum value and the minimum value of the shifting fork movement speed with the range of the maximum value and the minimum value of the preset shifting fork movement speed at the same stage, obtaining the fork shifting gear engaging force to be adjusted and the stage and recording and adjusting the fork shifting gear engaging force when the shifting fork gear shifting achieves a corresponding stage. The double-clutch type automatic transmission fork shifting gear engaging force dynamic self-adapting method is applied to control of a double-clutch automatic transmission and achieves vehicle gear shifting noise optimization.

Description

technical field [0001] The invention relates to a dynamic self-adaptive method for shifting fork engagement force on a vehicle. Background technique [0002] Dual-clutch automatic transmission is a complex system in which electromechanical and hydraulic systems work together. For cars equipped with dual-clutch automatic transmissions, shifting noises are likely to occur during low-gear sliding downshifts, which seriously affects the performance of the vehicle. This is caused by the inappropriate gearing force of the shift fork. If the gearing force is large, there will be shifting noise; if the gearing force is small, there is a risk of unsuccessful gearing. especially important. Moreover, due to differences in mechanical system manufacturing and hydraulic system response, if the shifting force of the shift fork is the same in the software, the effect will be different on different vehicles. Some vehicles have no noise when shifting gears, but a few vehicles have different...

AI Technical Summary

Problems solved by technology

Cars equipped with dual-clutch automatic transmissions are prone to shifting noise during low-gear sliding downshifts, which seriously affects the performance of the vehicle

This is caused by the inappropriate gearing force of the shift fork. If the gearing force is large, there will be shifting noise; if the gearing force is small, there is a risk of unsuccessful gearing. especially important

Moreover, due to differences in mechanical system manufacturing and hydraulic system response, if the shift fork force is the same in the software, the effect will be different on different vehicles. Some vehicles have no noise when shifting gears, but a few vehicles have different levels of shifting noise.

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