| 摘要 |
PURPOSE: A flow channel control apparatus is provided to allow a driver to perform steering operation in a stable manner by controlling flow channel of hydraulic system in accordance with vehicle speed. CONSTITUTION: A flow channel control apparatus comprises a valve body(1) having a first communicating hole(1a) and a second communicating hole(1b) which are communicated from a bypass flow channel(20) of an oil pump(40) side to the bypass flow channel of an oil storage tank(10), and a chamber(1c) formed inside of the valve body for oil flow; a spool(2) incorporated into the valve body, and which has a stepped portion(2a) formed at the outer periphery of the spool; a valve end(3) for closing an end of the valve body; a spring(4) fixed to the valve end in the valve body, and which restores the spool to it's original position when the spool has moved; and a solenoid(5) inserted into the rear end of the valve body, and which allows the spool to move forward or backward.
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