| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable capacity type oil pump capable of restricting a large-sized formation of a pump in its axial direction while employing a constitution in which a feed-back control is carried out by a main gallery pressure.SOLUTION: Between a first control oil chamber 31 applied for occurrence of biasing force in a concentric direction where a capacity varying amount in a plurality of pump chambers PR is decreased in respect to a cam ring 15 on the basis of a control pressure acting as a main gallery pressure fed by an internal combustion engine and a second control oil chamber 32 applied for occurrence of biasing force in an eccentric direction where a capacity varying amount in the plurality of pump chambers PR is increased in respect to the cam ring 15 on the basis of the control pressure, is installed a discharging chamber 36 partitioned in respect to the first and the second control oil chambers 31, 32 and applied for occurrence of biasing force in the concentric direction on the basis of pump discharging pressure directly fed from a discharging port 22a.SELECTED DRAWING: Figure 2 |
