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Engine system and method accounting for engine misfire

  • US 7,086,386 B2
  • Filed: 03/05/2004
  • Issued: 08/08/2006
  • Est. Priority Date: 03/05/2004
  • Status: Active Grant
First Claim
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1. A method for operating an engine having at least a first and second group of cylinders, the method comprising:

  • operating in a first mode with the first group of cylinders combusting inducted air and injected fuel and the second group of cylinders inducting air and substantially no injected fuel;

    operating in a second mode with the second group of cylinders combusting inducted air and injected fuel and the first group of cylinders inducting air and substantially no injected fuel;

    operating in a third mode with both the first and second groups of cylinders combusting inducted air and injected fuel;

    monitoring cylinders in the first and second groups of cylinders for an engine misfire condition; and

    disabling said first mode if an engine misfire condition is detected in a cylinder of the first group and disabling said second mode if an engine misfire condition is detected in the second group.

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