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Fuel injection control system with split fuel injection for diesel engine

  • US 5,231,962 A
  • Filed: 09/28/1992
  • Issued: 08/03/1993
  • Est. Priority Date: 09/27/1991
  • Status: Expired due to Term
First Claim
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1. A fuel injection control system for injecting fuel directly into a combustion chamber of a diesel engine, comprising:

  • angular position detecting means for producing an angular position signal each time a crankshaft of the diesel engine rotates through a predetermined angle;

    startup detecting means for detecting a startup condition of the diesel engine;

    pre-jet injecting means for injecting a pre-jet of fuel into the combustion chamber in synchronism with the angular position signal produced by said angular position detecting means when the startup condition of the diesel engine is detected by said startup detecting means; and

    main-jet injecting means for injecting a main jet of fuel, which is larger in quantity than said pre-jet of fuel, into the combustion chamber after said pre-jet of fuel is injected by said pre-jet injecting means when the startup condition of the diesel engine is detected by said startup detecting means.

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