| 摘要 |
Dual fuel injector 2 for an internal combustion engine, comprising concentrically arranged needles 6, 8, an inner needle 8 for controlling a flow of a high reactivity fuel such as diesel / DME received via a pilot piston shuttle, and an outer needle 6, in which the inner needle 8 is arranged and guided, for controlling a flow of a lower reactivity gaseous fuel; the inner and outer needles both being controlled by a single actuator 102 and control valve 82, wherein the injector can operate in a dual fuel operational mode, or in a high reactivity fuel only mode, as required for example on depletion of gaseous fuel. The injector may be used in a fuel injection apparatus 100 or a fuel system with two distinct fuel sources, and may be applied in the heavy duty trucking sector. |
