This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Optimal gearshift strategy in inertia phase of dual-clutch transmissions
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 06, 2021 by SAE International in United States
Event: SAE WCX Digital Summit
Shifting quality is an important indicator to measure the performance of dual-clutch transmissions.To obtain optimal driving comfort and reduce vehicle jerk as much as possible, this paper proposes a sliding mode controller to track the reference trajectory of clutch speed difference for the engagement clutch in inertia phase. First of all, a dynamic model of dual-clutch transmissions in inertia phase is established. The key factors determining shifting quality are analyzed. In order to reduce vehicle jerk, a reference trajectory of the speed difference between the input and output of the clutch in inertia phase is designed. Then a sliding mode controller is constructed to make the actual clutch speed difference track the reference trajectory.At the end, taking the upshift from the first gear to the second gear as an example, the effectiveness of the proposed controller is validated.Furthermore, a traditional PID controller is also designed to compare with the proposed controlled. The result shows that the sliding mode controller has an great advantage in reducing the vehicle jerk.