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Method and control apparatus for operating an internal combustion engine

  • US 6,754,577 B2
  • Filed: 11/20/2002
  • Issued: 06/22/2004
  • Est. Priority Date: 11/20/2001
  • Status: Active Grant
First Claim
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1. A control apparatus for operating an internal combustion engine, the control apparatus comprising:

  • a memory storing a computer program for carrying out a method for operating an internal combustion engine including a combustion chamber, a crankshaft and inlet and outlet valves opening to said combustion chamber, the method comprising the steps of;

    detecting the rpm (nmot) of said crankshaft;

    considering a fresh air charge (rl) of said combustion chamber and said rpm (nmot) when computing a pressure (ps) in a region lying upstream of said inlet valve by utilizing at least one of thermodynamic equations and flow equations at at least one discrete time point during a work cycle of said engine;

    or, considering a pressure (ps) in said region and said rpm (nmot) when computing said fresh air charge (rl) of said combustion chamber by utilizing one of thermodynamic equations and flow equations at at least one discrete time point during a work cycle of said engine.

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