| 摘要 |
PROBLEM TO BE SOLVED: To make an inclination angle of a variable capacity type pump changeable with favorable responsiveness at an initial stage of inversion when the negative pressure of an actuator which is connected to a main valve V1 becomes higher than the negative pressure of the other actuator, and is inverted to maximum negative pressure, after that, to reduce a gain of a change of the inclination angle, and to smoothly perform the control of the inclination angle.SOLUTION: A selection valve 26 is incorporated into a compensation spool CS, a pressure introduction port 24 for introducing negative pressure into the selection valve 26 maintains a full-opened state with respect to a recess 23 in a moving initial stage of the compensation spool CS, and an opening with respect to the recess 23 is reduced in a process in which the compensation spool CS moves.SELECTED DRAWING: Figure 1 |
