Patent ID: 7021271
Filing Date: 2006-04-04
Classification: F02B,F16H

Abstract:
1. A belt drive system comprising: an electric rotating machine operating as an electric motor, an electric rotating machine pulley that is mounted on a rotary shaft of said electric rotating machine; an auxiliary machine pulley that is connected to a rotary shaft of an auxiliary machine and transmits power to the auxiliary machine; an internal combustion engine crank pulley that is connected to a crankshaft of an internal combustion engine and transmits power in such a manner as being capable of performing input/output; a stationary tension pulley is located on the side opposite to the crank pulley with respect to said electric rotating machine pulley, an idle pulley with a first stopper-equipped auto-tensioner is located between said electric rotating machine pulley and said internal combustion engine crank pulley; a belt continuously wrapped around said electric rotating machine pulley, said stationary tension pulley, said auxiliary machine pulley, said internal combustion engine crank pulley and said idle pulley; and position of said idle pulley is fixed at the time of starting said internal combustion engine by means of said electric rotating machine, and is movable at the time of driving said electric rotating machine by means of said internal combustion engine by said auto-tensioner, wherein said stationary pulley and idle pulley are disposed on opposite sides each other with respect to said electric rotating machine pulley and provides a contact angle of the belt wrapped around said electric rotating machine pulley, and wherein said contact angle is in a range of not less than 130° and not more than 230°.