Transmission ratio control system for a continuously variable transmission.

摘要

A control system for a continuously variable transmission for a motor vehicle has a transmission ratio control valve (TR) for controlling the transmission ratio. The transmission ratio is controlled in accordance with a desired transmission ratio. On using an air conditioner of the vehicle, the desired transmission ratio increases, so that necessary engine power can be obtained. The desired transmission ratio is increased by a large value in a small transmission ratio range than a large transmission ratio range.