| 摘要 |
PROBLEM TO BE SOLVED: To lighten solenoid operation starting currant re-quire-d for operating both rods, thus reduce the heat generation of a solenoid and improve the operation responsiveness by Providing a spring. SOLUTION: Both rods 126 and 127 provided in a solenoid 107 are always energized in the operation direction (downward) by a spring 128. When the solenoid 107 is excited, both rods 126 and 127 move downward, activating a valve mechanism 104. Therefore, after that, control pressure according to the magnitude of the electric current conducted to the solenoid 107 is generated in a variable pressure chamber 103. |
