Patent ID: 8037784

Claim:
A drivetrain for a motor vehicle, including a main engine, an auxiliary engine, and a parallel shaft transmission, which transmission includes at least one primary shaft connected to the main engine by a clutch device, at least one secondary shaft including a drive pinion meshing with a differential ring gear, an intermediate shaft that is not coaxial with the primary and secondary shafts, and a plurality of synchromeshes configured to selectively cause the primary shaft to rotate as one with the secondary shaft, the drivetrain comprising: a main primary shaft and an auxiliary primary shaft each selectively connected to the main engine by the clutch device; and an intermediate shaft including a drive wheel connected to the auxiliary engine and permanently connected in terms of rotation to the primary shafts, in which the drive wheel is fixedly mounted on the intermediate shaft, which intermediate shaft includes a pair of fixed step-down pinions, one of the step-down pinions meshing with a fixed pinion belonging to the main primary shaft, and the other step-down pinion meshing with a fixed pinion belonging to the auxiliary primary shaft.