| 摘要 |
<p>PURPOSE:To prevent the generation of noise of a hydraulic actuator during ON-OFF of ignition, in an oil pressure control unit for a vehicle provided with a proportional electromagnetic pressure reducing valve having a proportional solenoid and an on-off solenoid. CONSTITUTION:An ignition ON-period solenoid control means and an ignition OFF-period solenoid control means which are operated to control an on-off solenoid (d) and a proportional solenoid (c) in relation with each other are provided. The occurrence of the rapid decrease and the rapid increase of an oil pressure owing to energization and non-energization to the on-off solenoid (d) is suppressed through control of the proportional solenoid (c) side.</p> |
