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Accumulator fuel injection system

  • US 5,341,783 A
  • Filed: 09/03/1993
  • Issued: 08/30/1994
  • Est. Priority Date: 02/03/1988
  • Status: Expired due to Term
First Claim
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1. A method of reducing undesired premixed burning in an internal combustion engine, comprising:

  • A. lifting an injector needle of a fuel injector a constant low-lift increment from a valve seat of said fuel injector;

    thenB. preventing lifting of said needle beyond said low-lift increment for a sufficient interval of time to inject a relatively small initial fuel charge into the engine, said interval terminating when lifting forces imposed on said needle overcome holding forces imposed on said needle by a stop plate, said stop plate having opposed first and second surfaces exposed to an ambient fluid pressure and to a fluid vapor pressure, respectively; and

    thenC. lifting said needle to a higher lift position to inject a main fuel charge into the engine.

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