Patent ID: 8757306

Claim:
A drive system for a vehicle, the system comprising: an internal combustion engine that generates a rotational power with a fuel supply; a transmission mechanism that changes a speed of the rotational power; a one-way clutch comprising: an input member; an output member; and a locking member configured to allow the input member and the output member to be locked or unlocked with each other, the locking member being configured to transmit the rotational power provided to the input member to the output member when the input member and the output member are locked with each other, wherein the input member and the output member are locked with each other when a forward rotating speed of the input member, which receives the rotational power output from the transmission mechanism, exceeds a forward rotating speed of the output member; a rotated driving member that is connected to the output member of the one-way clutch and transmits the rotational power transmitted to the output member to a drive wheel; an electric motor that is connected to an output shaft of the internal combustion engine so as to rotate the output shaft of the internal combustion engine; an electric motor generator that is connected to the rotated driving member and configured to transmit the rotational power to the rotated driving member and configured to perform regenerative operation by receiving the rotational power output from the rotated driving member; and a controller configured to cut off a fuel supply to the internal combustion engine and control the electric motor to rotate the output shaft of the internal combustion engine while the electric motor generator performs the regenerative operation, wherein the controller idles the internal combustion engine for an initial period of time, and then cuts off the fuel supply to the internal combustion engine and controls the electric motor to rotate the output shaft of the internal combustion engine while the electric motor generator performs the regenerative operation.