| 摘要 |
PROBLEM TO BE SOLVED: To reduce shock at the time of starting start-assisting, and to restrain the rush current of an electric motor to a low level, in a device constituted to drive the driven wheel of a vehicle by the electric motor to assist the start. SOLUTION: A hydraulic clutch 8 is interposed in a power transmission route between an electric motor 6 and driven wheels 4L, 4R to supply oil to the clutch 8 by a hydraulic pump 10 driven by the motor 6. Oil supplying pressure from the pump 10 is low in a low rotational-speed region of the motor 6 to generate slide of the clutch 8. Driving torques of the driven wheels 4L, 4R are thereby led moderately. |
