| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent air from being sucked from an air exhaust hole of a main pump during the operation of a sub-pump in a hybrid vehicle equipped with the main pump and the sub-pump. <P>SOLUTION: Suction oil passages and discharge oil passages of the main pump 10M and sub-pump 10S are connected in parallel with each other, and the respective discharge oil passages 17M, 17S are provided with accumulators 20M, 20S upstream of a junction G to intercept the discharge oil passage of the pump on the driving stop side. A discharge port 35 of the main pump 10M is provided with the air exhaust hole AM, and the air exhaust hole communicates with oil F in an oil pan 3 through a communicating oil passage 50. Consequently, since the discharge oil passage 17M is intercepted even if the main pump 10M stops, the state of the main pump being filled with oil is maintained for a considerable time. Responsiveness at the reset of operation is thereby high. Further, since the air exhaust hole AM is in communication with the oil in the oil pan, air is not sucked in re-operation. <P>COPYRIGHT: (C)2011,JPO&INPIT |
