| 摘要 |
<p>PURPOSE:To reduce variances in output oil pressures of a pressure regulator valve due to pulsation of signal oil pressures by providing the pressure regulator valve with a sub-chamber for introducing an input oil pressure of a solenoid valve for pressing a spool in the same direction with the direction of the signal oil pressure. CONSTITUTION:An input oil pressure port 4 for being inputted with an input oil pressure P1 outputs an output oil pressure P2 via a spool 2 from an output oil pressure port 5 to a hydraulic clutch 30. The spool 2 is provided on its one side with an output oil pressure return chamber 7 to which the output oil pressure P2 is to be returned via a communication hole 2c and on the other side with a sub-chamber 9 to which an input oil pressure Pin of a solenoid of a solenoid valve 10 is introduced and with a signal oil chamber 8 to which a signal oil pressure Pout is introduced. Since the signal oil pressure Pout is pulsating according to duty frequencies, the output oil pressure P2 can change considerably. The change in the output oil pressure P2, however, can be reduced as the input oil pressure Pin of the solenoid valve 10 is introduced to introduced to the sub-chamber 9.</p> |
