| 摘要 |
The present invention relates to a motor vehicle propulsion unit comprising a combustion engine (10) with a shaft (12), a speed varying device (14) comprising an engine epicycle gear train (24) with a sun gear (34) and annulus gear (48) each connected to the shaft (12) of the combustion engine (10) by a controlled coupling (26, 28) and to a fixed part (48) of the vehicle by a one-way automatic coupling (30, 32), and a driven axle (16). The couplings (26, 28) comprise synchronisers (68, 70) controlled by control means (96, 98). |
