Hydraulic control system for automatic transmission

摘要

A hydraulic control system for an automatic transmission which includes first and second throttle valves which produce respectively first and second throttle pressures related to the position of a throttle valve in an intake path of an engine. The first and second throttle pressures are different from each other. The first throttle pressure is used for controlling a line pressure and the second throttle pressure serves as a control pressure for shift valves.