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Cylinder air charge estimation system and method for internal combustion engine including exhaust gas recirculation

  • US 6,738,707 B2
  • Filed: 11/15/2001
  • Issued: 05/18/2004
  • Est. Priority Date: 11/15/2001
  • Status: Expired due to Fees
First Claim
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1. A method for determining a mass of charged air in a cylinder of an internal combustion engine, said engine having an intake manifold communicating with an engine cylinder, said method comprising the steps of:

  • determining a temperature of a combination of charged air and recirculated exhaust gas inducted into said cylinder of said engine;

    determining a total mass flow rate responsive to a pressure in said intake manifold and said temperature, said total mass flow rate including a mass flow rate of said charged air and a mass flow rate of said recirculated exhaust gas; and

    , calculating said mass of charged air from said total mass flow rate.

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