| 摘要 |
Disclosed is a spark plug for a direct injection engine having an integral fuel injector ("injector-igniter"), the two functions, fuel injection comprising a nozzle valve assembly 1 and ignition comprising a spark gap 4, being integrated into a single structural unit. By virtue of the miniature size of its injector nozzle valve assembly 1 disposed at or within the beneficially cooling tip of the traditional (eg. 14mm) spark plug threaded mounting cylinder 2, the two demanding and competing functions are segregated and prevented from compromising each other. The injected spray plume can be optimally positioned for combustion efficiency benefits of so-called "spray guided" direct injection.
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