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Internal combustion engine intake port flow determination

  • US 5,714,683 A
  • Filed: 12/02/1996
  • Issued: 02/03/1998
  • Est. Priority Date: 12/02/1996
  • Status: Expired due to Term
First Claim
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1. A method of determining intake port mass airflow in an internal combustion engine including intake and exhaust systems, said intake system having an intake air throttle, an intake manifold, an intake port including an intake valve for directing gas flow from the intake manifold into a combustion chamber, said exhaust system having an exhaust port including an exhaust valve and an exhaust manifold, the method comprising the steps:

  • determining pressures in said intake and exhaust manifolds;

    measuring engine speed; and

    ,determining gas mass flow through the intake port as a predetermined function of engine speed and a ratiometric relationship of intake and exhaust manifold pressures.

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