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Internal combustion engine with variable compression ratio

  • US 20060070605A1
  • Filed: 11/04/2005
  • Published: 04/06/2006
  • Est. Priority Date: 01/21/2004
  • Status: Active Grant
First Claim
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1. An internal combustion engine with a variable compression ratio comprising:

  • exhaust gas purifying catalyst provided in an exhaust passage compression ratio changing mechanism for changing the compression ratio by changing the volume of a combustion chamber; and

    , control unit for controlling a factor that influences the air-fuel ratio in such a way that in a transition period during which the compression ratio is changed, the air-fuel ratio of air-fuel mixture in a cylinder becomes substantially equal to the air-fuel ratio before and after the change of the compression ratio.

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