| 摘要 |
<p>A novel and improved closed nozzle injector (10) is provided which effectively and accurately controls the timing and rate of fuel injection while minimizing parasitic losses and needle value element wear. The closed nozzle injector (10) includes a needle valve element (16) movable between open and closed positions, an outer control volume (36), an injection control valve member (46) for controlling the flow of pressurized fuel from the outer control volume (36) to affect opening and closing of the needle valve element (16) and a needle valve biasing feature for optimizing the speed of needle valve opening and closing.</p> |
