| 摘要 |
PURPOSE:To improve fuel economy during buildup time of an engine by controlling speeds to be changed by setting separate target speed change ratio when returning to an original condition after fuel shutoff. CONSTITUTION:A line pressure oil passage 21 on the outlet side of an oil pump 20 communicates with a secondary cylinder 10, a line pressure control valve 22, a speed change control valve 23 and further via the said valve 23 and an oil passage 24 with a primary cylinder 9. The line pressure oil passage 21 further communicates via an orifice 32 with a regulator valve 25 and an oil passage 26 under a constant pressure of the regulator valve 25 communicates with solenoid valves 27, 28 and one side of the speed change control valve 23. Both of the solenoid valves 27 and 28, when turned on with a duty signal from a control unit 40, discharge pressure and, when turned off, output a regulator pressure PR. |
