| 摘要 |
PURPOSE:To control the release timing of a low speed frictional engaging device in a proper manner, by discharging oil from the low speed step frictional engaging device via a second discharge oil passage in time of shifting up an opening period of a suction throttle valve. CONSTITUTION:A second orifice 76 is installed in position from the point midway in a first discharge oil passage 66, and a second discharge oil passage 74 being connected to the other end is branched off. And, an on-off valve 58 opening or closing the discharge oil passage 74 is installed in a 2-3 timing valve 56. With this way, in time of shifting up an opening period of a suction throttle valve 10, oil is dischargeable out of a low speed step frictional engaging device via the second discharge oil passage 74. With this constitution, a discharge velocity of oil is properly determinable and, what is more, the release timing of this low speed step frictional engaging device is controllable in a proper manner. |
