Patent ID: 9464711
Filing Date: 2016-10-11
CPC Classification: F16H,Y10T

Claim Text:
1. A hydraulic pressure supply system of an automatic transmission for a vehicle which generates a low hydraulic pressure and a high hydraulic pressure using oil stored in an oil pan and supplies the low hydraulic pressure and the high hydraulic pressure respectively to a low pressure portion and a high pressure portion, the hydraulic pressure supply system comprising: a low-pressure hydraulic pump receiving the oil stored in the oil pan through an input line, generating the low hydraulic pressure, and discharging the low hydraulic pressure to a first low-pressure line; a first switch valve supplying the hydraulic pressure of the first low-pressure line selectively to a second low-pressure line or a first bypass line; a low-pressure regulator valve regulating hydraulic pressure of the second low-pressure line to stable low hydraulic pressure and supplying the stable low hydraulic pressure to the low pressure portion through a third low-pressure line; a high-pressure hydraulic pump increasing a portion of the hydraulic pressure supplied through the first low-pressure line to generate the high hydraulic pressure, and discharging the high hydraulic pressure to a high-pressure line; a second switch valve selectively supplying the hydraulic pressure supplied through the first bypass line to the high-pressure line through a second bypass line; and a high-pressure regulator valve regulating the hydraulic pressure supplied through the high-pressure line to stable high hydraulic pressure and supplying the stable high hydraulic pressure to the high pressure portion.