CONTROL SYSTEM FOR AN AUTOMOTIVE AUTOMATIC POWER TRANSMISSION

摘要

A control system for controlling the line pressure in a hydraulic control system of an automotive automatic power transmission, in which a line pressure regulator valve is controlled by a variable back pressure produced by a fluid jet nozzle which is electrically controlled in response to a variation in the vehicle speed, whereby a cutback is rapidly effected in the line pressure to effect a smooth shifting between the gear ratios.