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Method and apparatus for determining the gas temperature in an internal combustion engine

  • US 5,941,927 A
  • Filed: 09/14/1998
  • Issued: 08/24/1999
  • Est. Priority Date: 09/17/1997
  • Status: Expired due to Term
First Claim
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1. A method for determining a temperature of a gas charge in a cylinder of an internal combustion engine, the gas charge including a residual gas portion and a fresh gas portion, the method comprising the steps of:

  • ascertaining a temperature of the fresh gas portion;

    ascertaining a proportion of the fresh gas portion in the gas charge;

    ascertaining a temperature of the residual gas portion;

    ascertaining a proportion of the residual gas portion in the gas charge; and

    calculating the temperature of the gas charge as a function of the temperature of the residual gas portion, the proportion of the residual gas portion in the gas charge, the temperature of the fresh gas portion, and the proportion of the fresh gas portion in the gas charge.

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