| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic supply system of an automatic transmission for a vehicle capable of preventing an unnecessary hydraulic pressure loss and thereby improving fuel consumption by controlling the rotation number of an electric motor based on a hydraulic pressure supplied to a cooler in a hydraulic supply system of an automatic transmission to which two oil pumps driven by the electric motor are applied.SOLUTION: A hydraulic supply system of an automatic transmission for a vehicle is disclosed. The hydraulic supply system may include: an oil pump for low pressure that is driven by an electric motor, generates oil stored in an oil fan into low hydraulic pressure, and supplied it to a low pressure part and a cooler; and an oil pump for high pressure that is driven by the electric motor, increases one part of the low hydraulic pressure to high pressure, and supplies it to a high pressure part through a high hydraulic oil passage. In the hydraulic supply system, a pressure sensor for detecting the hydraulic pressure supplied to the cooler is arranged on an inlet side of the cooler, and therefore, the rotation number of the electric motor can be controlled based on the hydraulic pressure detected by the pressure sensor. |
