HYDRAULIC SYSTEM FOR AUTOMATIC TRANSMISSION AND CHECK VALVE OF THE SAME

摘要

PURPOSE: A check valve for the hydraulic system of an auto transmission is provided to seclude backward flowing by including a secondary check valve which is installed in the discharge end hydraulic line of a machinery oil pump. CONSTITUTION: A machinery oil pump(10) inhales oil which is stored in an oil pan. An electric-powered oil pump(30) is installed in a connection line which interlinks a discharge end hydraulic line of the machinery oil pump and the oil pan. The electric-powered oil pump is operated by a motor. A main check valve(50) is installed in a connection line which interlinks the discharge end hydraulic line of the electric-powered oil pump and the discharge end hydraulic line of the machinery oil pump. A secondary check valve is installed on the discharge end hydraulic line of the machinery oil pump.