| 摘要 |
Disclosed is a hydraulic supply system for a vehicle automatic transmission. The hydraulic supply system for a vehicle automatic transmission according to an embodiment of the present invention comprises an oil pump, which is operated by an electric motor for low pressure, and which produces low hydraulic pressure and provides the pressure to a first low hydraulic passage; a regulator valve for low pressure, which variably recycles part of the hydraulic pressure provided through the first low hydraulic passage through a first recycling passage depending on the size of the hydraulic pressure, and which controls the hydraulic pressure of the first low hydraulic passage and provides the pressure to a low pressure unit through a second low hydraulic passage; an oil pump for high pressure, which is operated by an electric motor for high pressure, and which boosts part of the hydraulic pressure of the first low hydraulic passage to be high hydraulic pressure and provides the pressure to a high pressure unit through a high hydraulic passage; and a regulator for low pressure, which is arranged in the high hydraulic passage, and which controls the hydraulic pressure of the high hydraulic passage and provides the pressure to the high pressure unit while variably recycling part of the hydraulic pressure provided through the high hydraulic passage through second and third recycling passages depending on the size of the hydraulic pressure. |
