DAMPING DEVICE AND CONTROL METHOD FOR A DRIVE TRAIN OF A MOTOR VEHICLE

The invention relates to a damping device and a control method for a drive train of a motor vehicle. The vibration damping device comprises a first rotating part, a second rotating part and a vibration damping spring, wherein the first rotating part and the second rotating part can relatively rotate within a preset range, and torque can be transmitted through the vibration damping spring. The damping device further comprises a synchronizing mechanism capable of moving between a connecting position and a separating position, and at the connecting position, the synchronizing mechanism enables the first rotating component and the second rotating component to be connected in an anti-torsion mode so that the first rotating component and the second rotating component can rotate synchronously. And at the separation position, the synchronizing mechanism separates the first rotating part from the second rotating part, so that the first rotating part and the second rotating part can rotate relatively. According to the