| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a pilot operated pressure valve which limits a rate of pressure rise and substantially eliminates excessive system and tank pressure spikes. <P>SOLUTION: Because a pilot ball 15 downstream of a damping orifice 22 is held off a pilot seat 38 in a normal starting condition by a pilot return spring 35, a main piston 20 will open immediately when system pressure overcomes low bias pressure of a main spring 17. The pilot operated pressure valve may comprise a pilot pressure bypass port 3 which selectively deactivates the pilot chamber 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
