| 摘要 |
<p>PURPOSE:To eliminate malfunction of a spool by providing No.1 and No.2 pressure receiving chambers on the both sides of the spool and installing a spring in No.1 pressure receiving chamber together with supplying oil to the said two pressure receiving chambers from circuits having the same oil pressure via orifices of the same size. CONSTITUTION:No.1 pressure receiving chamber 122 and No.2 pressure receiving chamber 128 are installed at the both ends of a spool 40, while a spring 43 is installed in No.1 pressure receiving chamber 122 to push the spool 40. Pressure oil is introduced into the pressure receiving chambers 122 and 128 from a main oil passage 112 via orifices 131 and 42, and the pressure oil is connected to a solenoid valve 124 as well. Thus, a clutch-non-operational-state can be maintained even when the main circuit oil pressure drops, thereby preventing the malfunction of the spool.</p> |
