HYDRAULIC CONTROL METHOD OF HYDRAULIC SYSTEM FOR AUTO TRANSMISSION

摘要

PURPOSE: A hydraulic control method of a hydraulic system for an auto transmission is provided to obtain stable performance through the reduction of parts generating a fail by removing a plurality of valves. CONSTITUTION: A working fluid is discharged from an oil pump(130). The working fluid is controlled by a line pressure. A plurality of clutches and friction elements are controlled by using the working fluid. The pressure controlled by the line pressure is controlled with solenoid valves(134,140,142). A rotary type integral valve(RTV1,RTV2) controls the rotation angle and the speed of rotation according to the rotational motion of a control motor. The rotary type integral valve executes a control operation by applying an optimal pressure to the clutch and the brake.