HYDRAULIC SUPPLY SYSTEM OF AUTOMATIC TRANSMISSION FOR VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic supply system of an automatic transmission for a vehicle.SOLUTION: A hydraulic supply system may includes: a low pressure hydraulic pump 2 generating a hydraulic oil to discharge the hydraulic oil to a first low pressure line 16; a low pressure regulator valve 10; a reducing valve 12 reducing the pressure of the hydraulic oil to supply the hydraulic oil to a low pressure portion through a third low pressure line 24; a high pressure hydraulic pump 6 raising the pressure of the hydraulic oil supplied from the low pressure hydraulic pump through the first low pressure line to discharge the raised pressure hydraulic oil to a high pressure line; a switch valve 36 disposed between the first low pressure line and the high pressure line to selectively connect the first low pressure line and the high pressure line; a high pressure regulator valve 30 controlling the hydraulic oil supplied from the high pressure hydraulic pump through the high pressure line and the hydraulic oil selectively supplied from the low pressure hydraulic pump to be a pressure stable hydraulic oil, and supplying the pressure stable hydraulic oil to a high pressure portion; and a second input line 42 connecting an oil pan to the first low pressure line.