Patent ID: 6672267
Filing Date: 2004-01-06
Classification: F02N,Y10T

Abstract:
An engine-starting apparatus comprising:an electric motor; and an overrunning clutch having a driving member connected to the electric motor and a driven member connected to an internal combustion engine, the driving member and the driven member being adapted to be coupled to transmit a rotational torque of the electric motor to the internal combustion engine and to be separated to intercept torque transmission from the internal combustion engine to the electric motor, both members being adapted to be switched from a separated state to a coupled state at a coupling speed and from the coupled state to the separated state at a separating speed, wherein: the coupling speed is set to a speed equal to or higher than a level at which the rotational speed of the driven member becomes equal to the rotational speed of the driving member under a situation where the internal combustion engine stalls after a cranking operation by the engine-starting apparatus and the rotational speed of the driven member decreases more quickly than that of the driving member in a course of the engine stall.