| 摘要 |
PURPOSE:To get working oil pressure of appropriate character according to the car condition, by regulating the oil pressure in the back pressure chamber of an accumulator, as it meets the command from a computer. CONSTITUTION:When an electromagnetic solenoid valve S4 is made to be OFF by the command of ECU, line pressure PL is output from an output port 309 as it is. On the other hand, when said electromagnetic solenoid valve S4 is made to be ON, the output port 309 is closed, and the oil pressure after this output port 309 is lowered. Accordingly, the pressure PA in each back pressure chamber of the accumulator can be controlled freely and appropriate working oil can be got, by making the electromagnetic solenoid valve S4 to be ON or OFF by ECU, and changing the duty ratio according to various conditions. |
