DEVICE FOR CONTROLLING THE GEAR RATIO OF A CONTINUOUSLY VARIABLE TRANSMISSION

摘要

PCT No. PCT/EP96/03208 Sec. 371 Date Dec. 17, 1997 Sec. 102(e) Date Dec. 17, 1997 PCT Filed Jul. 20, 1996 PCT Pub. No. WO97/05407 PCT Pub. Date Feb. 13, 1997A device for controlling the gear ratio of a continuously variable transmission. The theoretical rotational speed or transmission ratio is fed to the signal input of a set-value filter (44). The time constant (T-RS) of the set-value filter (44) is adaptively controlled so that the change in transmission ratio takes place in accordance with a transition function whose limit is defined by a maximum variation speed. The principal advantage of the invention is that the vehicle is not slowed when shifting down to lower transmission ratios.