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Apparatus for and method of controlling internal combustion engine

  • US 5,666,916 A
  • Filed: 12/23/1994
  • Issued: 09/16/1997
  • Est. Priority Date: 12/28/1993
  • Status: Expired due to Fees
First Claim
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1. Apparatus for controlling a spark-ignition internal combustion engine, comprising:

  • fuel injection means for injecting fuel directly into a combustion chamber of the spark-ignition engine;

    ignition means for igniting a mixture in said combustion chamber;

    torque detection means for detecting an output torque of the spark-ignition engine;

    valve means for introducing an intake air into said combustion chamber;

    fuel control means for controlling an amount of the fuel to be injected from said fuel injection means, and a timing of the injection of the fuel;

    ignition timing control means for controlling an ignition timing of said ignition means; and

    intake air amount control means for controlling an amount of the intake air into said combustion chamber;

    wherein in order that a value of the output torque detected by said torque detection means can approach a predetermined value, said fuel control means changes the fuel amount, and said intake air amount control means changes the intake air amount, thereby changing an air/fuel ratio;

    wherein said ignition means is provided in the vicinity of said fuel injection means;

    wherein under a partial load, an air-fuel mixture is ignited after the fuel is injected, and a resulting flame is caused by a spray of the fuel to spread into a cylinder of the engine, thereby effecting combustion; and

    wherein when a load is increased, so that soot is produced in a stratified combustion, the fuel injection is effected a plurality of times in a divided manner, and a premixture is produced within the cylinder by a front-half injection, and a flame, produced by a latter-half injection, is jetted into the cylinder to burn said premixture.

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