| 摘要 |
PROBLEM TO BE SOLVED: To suppress variation of discharge flow rate of a variable displacement type vane pump.SOLUTION: A pressure of the upstream side of a metering orifice 91 is introduced from an upstream pressure introduction channel 96 connected to a high pressure chamber 65 on a position of the pressure plate side rather than a protrusion part 84 in a driving shaft axial direction onto a control valve which makes an eccentric amount of a cam ring variable. Thereby, a pressure of working fluid in the high pressure chamber 65 in which influence due to the protrusion part 84 is suppressed can be introduced to the control valve as a metering orifice upstream pressure, the precision of eccentric amount control of the cam ring by virtue of the control valve is improved and the variation of discharge flow rate of the pump can be suppressed.SELECTED DRAWING: Figure 4 |
