Patent ID: 9151380
Filing Date: 2015-10-06
Classification: F16H,Y10T

Abstract:
1. A hydraulic pressure control apparatus for an automatic transmission having a torque converter and a powertrain, the apparatus comprising: an oil tank storing oil; a first hydraulic pump connected with the oil tank to receive oil from the oil tank, having a first motor, and adapted to generate a low pressure through an operation of the first motor; a second hydraulic pump fluidly connected with the first hydraulic pump to receive the low pressure, having a second motor, and adapted to generate a high pressure through an operation of the second motor; a first regulating valve adapted to receive the low pressure from the first hydraulic pump and to regulate a first operating pressure to supply to the torque converter; a second regulating valve adapted to receive the high pressure from the second hydraulic pump and to regulate a second operating pressure to supply to the powertrain; a control unit adapted to control operation of the first and second regulating valves; a first switch mounted at the first regulating valve to detect information regarding the hydraulic pressure of the first regulating valve and adapted to transmit the information to the control unit; and a second switch mounted at the second regulating valve to detect information regarding the hydraulic pressure of the second regulating valve and adapted to transmit the information to the control unit.