STEUERUNGSVORRICHTUNG FUER EIN GETRIEBE MIT STUFENLOS VERAENDERBAREM UNTERSETZUNGSVERHAELTNIS

摘要

A control for a continuously variable transmission provides an improved transient performance by restraining proportional and integral terms when an error exceeds a predetermined value range. This is effective in suppressing an overshoot in driver pulley revolution speed in approaching to its target speed. This control is provided with a safeguard against break down of a vehicle speed sensor such that the above mentioned restrain is removed when the vehicle speed indicative signal should drop to zero during running of the vehicle.