| 摘要 |
<p>A residual pressure control valve which is interposed between a fuel injection pump and a nozzle includes an annular valve element 17 which is biased by a spring into contact with a seating 15 surrounding a port 16 connected to the pump. Slidable in the valve element is a piston 19 which is resiliently biased away from the seating. The piston has a groove 22 communicating with the port 16 and the valve element has a port 21 which is uncovered to the groove upon movement of the piston relative to the valve element against the action of its resilient loading.</p> |
