| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain hydraulic pressure in an oil passage at a proper state when blocking the oil passage of an electric pump by a switching mechanism. <P>SOLUTION: In a C1-relay valve 70, there is formed a drain port 72e which makes an input port 72b (output-port oil passage 53 of linear solenoid valve SLC1) communicate with an output port 72d (C1-oil passage 56 of a clutch C1), and communicates with an input port 72c when the communication of the input port 72c (discharge-port oil passage 55 of electromagnetic pump 60) and the output port 72d is blocked, and a check valve 82 is attached to the drain port 72e via a drain oil passage 59. By this arrangement, even if there occurs the leak-in of high pressure oil to the side of the input port 72c, the oil can be drained via the drain port 72e, the drain oil passage 59 and the check valve 82. <P>COPYRIGHT: (C)2012,JPO&INPIT |
