| 摘要 |
<p>In a fuel injector including an injector housing (10) having spray orifices (70), a valve seat (68) within the body (10) and closely adjacent the spray orifices (70), a valve (66) movable within the body (10) between positions seated against the seat (68) and spaced from the seat (68), means (80) within the body (10) biasing the valve (66) towards the position against the seat (68), means (22) for receiving fuel at a first pressure, means (12) for increasing the pressure of the fuel to a second pressure higher than the first pressure, means (46, 60, 58, 62) for delivering the fuel at the second pressure to the valve (66), means (74) responsive to the receipt of fuel at the second pressure for moving the valve (66) from the position against the seat (68) to the position spaced from the seat (68), the improvement including means (50, 54) for limiting the delivery of fuel at the first pressure from the receiving means (22) to the valve (66) and for limiting the flow of fuel from the valve (66) to the receiving means (22).</p> |
