PROCESS FOR CONTROLLING A TORQUE TRANSMISSION SYSTEM

摘要

PCT No. PCT/DE93/00765 Sec. 371 Date Oct. 17, 1994 Sec. 102(e) Date Oct. 17, 1994 PCT Filed Aug. 21, 1993 PCT Pub. No. WO94/04852 PCT Pub. Date Mar. 3, 1994A method of operating a torque transmitting system with a hydrodynamic power transmission and with a friction clutch, which constitutes a lock-up clutch and bridges the power transmission, involves controlling the lock-up clutch and the hydrodynamic power transmission so that clutch slip is present. The input torque furnished by a prime mover is divided into a torque which is to be transmitted by the power transmission and a torque which is to be transmitted by the lock-up clutch. The lock-up clutch includes an annular piston which is disposed between the cover and the turbine wheel of the power transmission. The radially outer portion of the piston constitutes a clutch disc and its radially inner portion is mounted on a complementary sealing hub. The power transmission is "soft" and exhibits a flat progress of the primary characteristic curve as well as a wide secondary characteristic curve, i.e., a wide torque conversion range.