| 摘要 |
PURPOSE: A line pressure controlling apparatus for vehicle is provided to improve fuel efficiency and prevent a generation of judder due to interference of clutch slip control when a hydraulic power unit transits from an electric oil pump to a mechanical oil pump. CONSTITUTION: A line pressure controlling apparatus for vehicle comprises: a mechanical oil pump, an electric oil pump, and a line pressure controller. The mechanical oil pump pump-operates by a driving operator. The electric oil pump is installed in parallel on the mechanical oil pump and a hydraulic circuit, and pump-operates by an electric motor. The line pressure controller takes the mechanical oil pump and the electric oil pump as the hydraulic circuit, and outputs a line pressure order making the line pressure which is the raw pressure of the control hydraulic power for a hydraulic power connecting friction element which is arranged in an operating system. [Reference numerals] ((b)) SubOP+mechanical OP; (AA) CL2 slip control = IN; (BB) Line pressure order; (CC) Line pressure loss; (DD) Sub OP pressure; (EE) Line pressure order; (FF) Mechanical OP pressure; (GG) Study value or slip control IN; (HH) SubOP stop |
