| 摘要 |
<p>PROBLEM TO BE SOLVED: To dissolve the excessive wear, premature failure and unstable pressure of a valve assembly by providing a circuit for integrating a difference between a pilot pressure feedback signal and an output pressure feedback signal to generate an integrated feedback signal. SOLUTION: A pilot pressure feedback loop 24 is distributed to a pilot pressure line 20 and electrically connected to an electric part 22 in a valve 18 to generate a pilot pressure feedback signal in accordance with a pilot signal. An output pressure feedback loop 30 is distributed to an output port 16 in a booster pressure governor 12 and electrically connected to the electric port 22 in the valve 18 to generate an output pressure feedback signal in accordance with output pressure of the booster pressure governor 12. An integrating circuit 38 integrates a difference between the pilot pressure feedback signal and the output pressure feedback signal to generate an integrated feedback signal. Therefore, the excessive wear, premature failure and unstable pressure of a valve assembly can be dissolved.</p> |
