Gear-shifting control method and device of dual-clutch transmission and automobile

Abstract

The invention provides a gear-shifting control method and device of a dual-clutch transmission and an automobile. By adoption of the gear-shifting control method and device of the dual-clutch transmission and the automobile, the problem that in the prior art, the acceleration of a whole automobile is changed due to gear shifting of a transmission, and consequentially, the driving comfort is low issolved. The gear-shifting control method of the dual-clutch transmission is applied to a transmission control unit (TCU) and comprises the steps that the current gear-shifting state of the transmission is obtained; when the current gear-shifting state of the transmission is that the transmission is in the gear-shifting process and in a torque-phase stage, a first duration of the transmission in the torque-phase stage and a second total duration of the transmission in the torque-phase stage are determined; the real-time speed ratio of the transmission is determined according to the first duration and the second total duration; and the real-time speed ratio is transmitted to an electronic control unit (ECU) of a power source, the ECU determines the torque required by a driver according to the real-time speed ratio and the MAP torque of the power source, and the torque of the power source is controlled according to the torque required by the driver.

Description

technical field [0001] The invention relates to the field of automobile clutch control, in particular to a shift control method and device of a dual-clutch transmission and an automobile. Background technique [0002] During the shifting process of the dual-clutch automatic transmission, due to the change of the transmission speed ratio before and after the shift, the acceleration of the vehicle changes accordingly. In the case of the same power source input, the upshift acceleration decreases and the downshift acceleration increases. Such as figure 1 As shown, during the shifting process of the traditional dual-clutch transmission, with the different shifting stages of the transmission, the acceleration of the vehicle is different at different shifting stages, especially when the transmission is in the torque phase. A larger decline occurred. This change in vehicle acceleration due to gear shifting is not expected by the driver, thus adversely affecting driving comfort. ...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a shift control method and device of a dual-clutch transmission and an automobile, so as to solve the problem in the prior art that the acceleration of the entire vehicle changes due to shifting of the transmission, resulting in low driving comfort.

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