Automatic transmission for vehicle - incorporates kick-down modulation valve, throttle valve and gear-change valve

摘要

The automatic transmission has a valve for controlling the gearchange point. It incorporates a kickdown valve (82) connected to a throttle valve (54). A kickdown valve (55) is connected to the kickdown modulation valve (82).$ A gear-shift valve (66) with valve slide (130) is moved in relation to the throttle pressure, throttle modulation pressure and kickdown pressure. The amount of kickdown modulation pressure is determined by means of a spring arrangement (102) on the kickdown modulation valve (82).$ USE ADVANTAGE - Hydraulic transmission for vehicle. The constant hydraulic pressure source for the kickdown modulator valve can be adjusted by a spring.