| 摘要 |
PURPOSE: A hydraulic system keeps line pressure operating upon an end clutch to be stable. CONSTITUTION: An orifice control valve(10) is composed of a valve spool(15), a spring, an end clutch pressure reacting channel(25), a beginning line pressure activating orifice channel(27) and an end clutch pressure booster channel(29). The valve spool(15) has a land member(19) formed on one end thereof and a spring inserting land member(17) formed on the other end thereof. The spring is inserted and installed in the spring inserting land member(17). The end clutch pressure reacting channel(25) is communicated with the land member(19). The beginning line pressure activating orifice channel(27) is connected between the land member(17) and the land member(19) of the valve spool(15). The end clutch pressure booster channel(29) is opened and closed by the land member(17). The orifice control valve(10) composed of the members above and mounted on a channel installed from a shift control valve to an end clutch can control the flowing amount of oil so as to keep line pressure operating upon an end clutch to be stable.
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