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US5934559A Electronic fuel injector with internal single-pole solenoid and center flow post 失效
具有内部单极电磁阀和中心流柱的电子燃油喷射器

Electronic fuel injector with internal single-pole solenoid and center
flow post
摘要:
A fuel injector includes a valve member disposed at the upper end of the injector case adjacent a valve recess. The valve member includes a bore and a counterbore, and a tube having a bore is slidably disposed within the counterbore. The valve member bore and the tube bore define a fuel flow passage substantially coincident with the central axis of the injector. The valve member is spring biased to an open position to communicate fuel at transfer pump pressure to the valve recess. At the initiation of the injection cycle, an actuator, preferably an electrical solenoid, closes the valve against the spring force so that fuel is communicated along the central passage to a nozzle.
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