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Cylinder intake air quantity determination device

  • US 7,025,041 B2
  • Filed: 01/07/2005
  • Issued: 04/11/2006
  • Est. Priority Date: 02/18/2004
  • Status: Expired due to Fees
First Claim
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1. A cylinder intake air quantity determination device comprising:

  • a manifold internal air quantity calculation section configured to calculate a manifold internal air quantity based on a balance between an air quantity flowing into an intake manifold and an air quantity flowing out of the intake manifold;

    a manifold internal pressure calculation section configured to calculate a manifold internal pressure based at least on the manifold internal air quantity;

    a cylinder internal pressure calculation section configured to calculate a cylinder internal pressure based on at least one parameter that affects a vapor state inside a cylinder; and

    a cylinder intake air quantity calculation section configured to calculate a cylinder intake air quantity based on the manifold internal pressure and the cylinder internal pressure.

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