| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil pump discharge changeover circuit capable of more reducing the fuel consumption while the load of the oil pump can be more reduced by expanding the operation region in a partial discharge state.SOLUTION: An oil pump discharge changeover circuit 1 comprises: a first line pressure oil passage 70A communicated with a first delivery port 107A of an oil pump 10; a selector valve 50 that switches the discharge destination of the oil discharged from a second delivery port 107B between a third line pressure oil passage 70C communicated with the first line pressure oil passage 70A and a second suction oil passage 80B communicated with an inlet 106A and an inlet 106B of the oil pump 10; and a control valve 40 for controlling the selector valve 50 when a resultant force of a spring force and a pushing force by actual line pressure is larger than a pushing force by line pressure control pressure, the second delivery port 107B is communicated with the second suction oil passage 80B when the resultant force is less than the pushing force by line pressure control pressure, the second delivery port 107B is communicated with the third line pressure oil passage 70C.SELECTED DRAWING: Figure 2 |
