Patent ID: 9360106
Filing Date: 2016-06-07
CPC Classification: F04C,F15B,F16H

Claim Text:
1. A hydraulic pressure supply system of an automatic transmission for a vehicle, comprising: a hydraulic pump provided with first and second pump chambers formed therein, wherein the first and second pump chambers are connected to an oil pan respectively through first and second input lines and discharge generated hydraulic pressure respectively through first and second discharge lines; a high-pressure regulator valve disposed on a high-pressure line connected to a high pressure portion, regulating hydraulic pressure supplied from the first and second pump chambers to the high pressure portion though the high-pressure line to stable hydraulic pressure, and supplying surplus hydraulic pressure to a low pressure portion through a first recirculation line connected to the high-pressure regulator valve; a first switch valve connecting the second discharge line connected to the second pump chamber selectively to a first low-pressure line or a first bypass line connected to the first input line, and supplying the hydraulic pressure generated at the second pump chamber selectively to the first low-pressure line or the first bypass line; a second switch valve connecting the first low-pressure line selectively to a second bypass line connected to the high-pressure line or a second low-pressure line, and supplying the hydraulic pressure supplied through the first low-pressure line selectively to the second bypass line or the second low-pressure line; and a low-pressure regulator valve connecting the second low-pressure line to a third low-pressure line connected to the low pressure portion, regulating the hydraulic pressure supplied to the low pressure portion through the second low-pressure line and the third low-pressure line to be stable, and recirculating surplus hydraulic pressure to the first input line through a second recirculation line.