Drive train for a motor vehicle, in particular for a motor vehicle with a permanently energizable electric machine

摘要

The invention relates to a drive train (1) for a motor vehicle, in particular for a motor vehicle having a permanently energizable electric machine (2a), wherein at least one electric machine (2), in particular a permanently excitable electric machine (2a), and at least one transmission (3), in particular an input gear, is provided, wherein the electric machine (2) at least one drive shaft (4) and the transmission (3) at least one transmission input shaft (5) and at least one transmission output shaft (6), wherein the drive shaft (4) with the transmission input shaft ( 5) via a coupling device (7) rotatably coupled or decoupled, wherein in the normal state, namely in the energized state of the electric machine (2), the coupling device (7) closed and the drive shaft (4) rotationally coupled to the transmission input shaft (5), and wherein in the de-energized state, in particular in the event of a fault of the electric machine (2), the coupling device (7 ) is opened and the drive shaft (4) from the transmission input shaft (5) is decoupled. The construction, maintenance and assembly costs are reduced by the fact that the coupling device (7) by a pressure build-up by means of a pump (8) can be opened, wherein at least one valve assembly (9) is provided and the valve assembly (9) and / or the pump (8) is designed and / or arranged so that the pressure build-up for opening the coupling device (7) can be realized in the de-energized state.