Patent ID: 6830524
Filing Date: 2004-12-14
Classification: F16H

Abstract:
A crank drive belt system for an engine having a belt drivingly connected between a crank pulley, a motor generator pulley and at least one accessory drive pulley, the system alternately driven by the motor generator pulley for cranking the engine and by the crank pulley for driving a motor generator and an accessory, said system including a triple pulley tensioner comprising:a tensioner body fixed to the engine; a fixed idler pulley rotatably mounted on the tensioner body and engaging the belt at a location displaced from the motor generator; a first tensioner pivoted on the body and having a first pulley tensioning the outer side of the belt adjacent the motor generator pulley on a belt span from the crank pulley to the motor generator pulley to maximize belt wrap around the motor generator pulley and take up slack in the belt during crank drive of the motor generator; and a second tensioner pivoted on the body and having a second pulley tensioning the outer side of the belt adjacent the motor generator on a belt span from the motor generator pulley to the crank pulley to maximize belt wrap around the motor generator pulley and take up slack in the belt during motor generator drive of the crank.