Patent ID: 10612647

Abstract:
An oil supply system of an automatic transmission for vehicle may include low-pressure oil pump discharging the oil to low-pressure passage; torque converter control valve controlling flow of the low-pressure passage while recirculating some of surplus flow rate and supplying the controlled flow rate to an operating-side chamber of torque converter and downstream valve; torque converter lock-up clutch switch valve supplying the flow rate of the torque converter control valve and circulation flow rate of the operating-side chamber of the torque converter to lubrication passage; torque converter pressure control valve supplying the flow rate to non-operating side chamber of the torque converter; high-pressure oil pump boosting some of the flow rate of the low-pressure passage and discharging the boosted flow rate to high-pressure passage; and line regulator valve supplying the surplus flow rate during control process to the low-pressure passage and supplying the controlled flow rate to high-pressure portion.