| 摘要 |
<p>A fuel injector has an injector control valve (44) including a control valve member (48) which is movable within a bore (50; 50a, 50b) provided in a control valve housing (46; 86, 88). A valve needle (10; 80) of the injector is movable relative to a valve needle seating to control fuel injection through one or more injector outlets and a fuel inlet (66) of the injector receives a supply of fuel at high pressure. An annular flow path (51) is provided for delivering a flow of fuel from the fuel inlet (66) to an injector delivery chamber (16; 38), from where fuel is delivered to the or each outlet. The annular flow path (51) is defined between the bore (50; 50a, 50b) in the control valve housing (46; 86, 88) and an outer surface of the injector control valve, although said flow of fuel is not controlled by means of the injector control valve (44). It is a benefit of the invention, therefore, that the fuel supply path for high pressure fuel utilises the bore (50; 50a, 50b) for the control valve member (48) to define a part of the flow, rather than relying on a separate drilling through the control valve housing (46, 86).</p> |
