| 摘要 |
PURPOSE:To supply a sufficient lubrication oil quantity to an automatic transmission even at the time of high load travel or the like by providing the 1st lubrication oil passage from a torque converter hydraulic circuit, and the 2nd lubrication oil passage from a hydraulic circuit other than the above, and a valve that conducts the control of connection/interception between both lubrication oil passages. CONSTITUTION:A solenoid valve 8 is closed at the time of low load travel, so a predetermined lubrication oil quantity is supplied to an automatic transmission lubrication rear portion 3 from a torque converter hydraulic circuit 2 via the 1st rear portion lubrication oil passage 5. The valve 8 is opened at the time if high load travel, so in addition to the lubrication oil quantity that comes from the hydraulic circuit 2 via the oil passage 5, a lubrication oil quantity that comes from the 2nd rear portion lubrication oil passage 10 connecting a valve 8 input port 8a to a hydraulic circuit 9 other than the above, is supplied to the automatic transmission lubrication rear portion 3 through a one way orifice 7. Therefore, a sufficient lubrication oil quantity is secured. |
