SCHALTVORRICHTUNG FÜR EIN STUFENLOSES GETRIEBE EINES KRAFTFAHRZEUGES

摘要

PCT No. PCT/GB98/02831 Sec. 371 Date Mar. 2, 1999 Sec. 102(e) Date Mar. 2, 1999 PCT Filed Sep. 17, 1998 PCT Pub. No. WO99/15814 PCT Pub. Date Apr. 1, 1999A transmission control system for a vehicle 10 is disclosed comprising a continuously variable transmission (CVT) 14 whose transmission ratio is varied by a CVT controller 20. When the selector lever 24 is in drive D, the CVT controller 20 varies the transmission ratio in a continuous manner but, if a stepped down-shift is selected using a down-shift button DS on the steering wheel 36, a hybrid mode may be entered to allow a user to perform stepped down-shifts to provide engine braking. In the hybrid mode, stepped down-shifts can be selected but the vehicle 10 is accelerated by varying the transmission ratio in a continuous manner.