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Control system and control method of internal combustion engine

  • US 7,367,318 B2
  • Filed: 10/07/2005
  • Issued: 05/06/2008
  • Est. Priority Date: 10/07/2004
  • Status: Active Grant
First Claim
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1. A control system of an internal combustion engine having a valve mechanism able to change a valve opening characteristic of at least one of an intake valve and exhaust valve and burning an air-fuel mixture comprised of fuel and air inside a combustion chamber to generate power, characterized by being provided witha cylinder pressure detecting means for detecting a cylinder pressure at said combustion chamber andan intake air calculating means for calculating an amount of air sucked into said combustion chamber based on an intake air pressure during valve overlap between said intake valve and said exhaust valve, an exhaust gas pressure during valve overlap, a cylinder pressure during the compression stroke detected by said cylinder pressure detecting means, and a gas passage effective area during said valve overlap.

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