| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic circuit structure of a transmission for protecting an electric pump unit from flying objects, and hardly receiving oscillation and the like during traveling. <P>SOLUTION: The hydraulic circuit structure of the transmission includes: a main valve 110 that is provided at a lower part of a transmission case 100 and can control fluid pressure for engagement and disengagement of a friction engagement element of an automatic transmission T/M; a mechanical pump OP1 supplying delivery pressure to the main valve 110; and the electric pump OP2 connected to a sub-suction oil passage 126 and a second delivery oil passage 122 connected to a suction oil passage 112 and a delivery oil passage 125 of the mechanical pump OP1 and driven by the electric motor. A sub-valve 120 provided with the sub-suction oil passage 126, the second delivery oil passage 122, a first flapper valve 123, and a second flapper valve 124 is disposed between the main valve 110 and the electric pump OP2, and stored at the lower part of the transmission case 100. <P>COPYRIGHT: (C)2010,JPO&INPIT |
