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Idle speed control for lean burn engine with variable-displacement-like characteristic

  • US 6,769,398 B2
  • Filed: 06/04/2002
  • Issued: 08/03/2004
  • Est. Priority Date: 06/04/2002
  • Status: Active Grant
First Claim
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1. A method for controlling an engine having a first and second group of combustion chambers, comprising:

  • inducting air and injecting fuel into the first combustion chamber group at a first average air-fuel ratio, where said first average air-fuel ratio is leaner than stoichiometry;

    inducting air and not injecting fuel into the second combustion chamber group; and

    adjusting said injected fuel to the first combustion chamber group based on a desired speed and a determined speed so that said determined speed approaches said desired speed.

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