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Method for improving fuel control in an internal combustion engine

  • US 4,404,946 A
  • Filed: 11/02/1981
  • Issued: 09/20/1983
  • Est. Priority Date: 09/27/1979
  • Status: Expired due to Term
First Claim
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1. A method for improving the fuel control of an internal combustion engine having an intake conduit and an exhaust conduit, the method comprising the steps of:

  • (a) measuring the intake conduit pressure value;

    (b) establishing an exhaust conduit pressure value;

    (c) determining the ratio between the engine'"'"'s intake conduit pressure value and its exhaust conduit pressure value;

    (d) using the determined ratio to determine the volumetric efficiency value of the engine, the volumetric efficiency value being determined with respect to the flow of gases into at least one combustion chamber of the engine;

    (e) calculating the air mass flow into the engine based upon such determined volumetric efficiency value;

    (f) metering fuel to the engine in a quantity based upon such calculated air mass flow; and

    when a value for air mass flow is available said steps of establishing an exhaust conduit pressure value including calculating the exhaust conduit pressure using the latest available air mass flow.

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