INTEGRAL DRIVE TRANSMISSION FOR MOTOR CARS WITH A DEVICE FOR ENGAGING AND DISENGAGING THE DRIVE TO A SECOND AXLE

摘要

An integral drive transmission for motor cars comprises a gearbox-differential unit (10) for the transmission of drive to a pair of drive shafts of a first pair of wheels (14) of the car and, by means of a propeller shaft (16) connectible to or disconnectible from a power take-off (94) of the gearbox-differential unit, to a secondary differential (22) for transmission of the drive to a pair of drive shafts (18) of the second pair of wheels (20) of the car. Two clutches ((38) operated by pressurised-fluid actuators (58) are provided for rotationally coupling and uncoupling the second pair of wheels with respect to the secondary differential (22) and the propeller shaft (16).