| 摘要 |
A vehicle drive apparatus is basically provided with a main power source (1), a first motor/generator (3), a second motor/generator (5), a planetary gearset (10) and a step- shifting automatic transmission (6). The planetary gearset (10) is operatively coupled to the main power source (1) and the first motor/generator (3) to rotate an output shaft (23) leading to a drive wheel. The step-shifting automatic transmission (6) connects the planetary gearset (10) and the second motor/generator (5) to the output shaft (23) for selectively changing an output gear ratio from the planetary gearset (10) and the second motor/generator (5). The step-shifting automatic transmission (6) has a plurality of gear positions. The step-shifting transmission includes a dog clutch (8) serving as a holding element for at least one the gear positions and a factional holding element (7) as a holding element for at least one other of the gear positions with the frictional holding element (7) at least transmits torque in a slipping state during a shifting operation. |
