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Method of controlling operation of internal combustion engines in dependence upon intake air temperature

  • US 4,770,148 A
  • Filed: 01/08/1987
  • Issued: 09/13/1988
  • Est. Priority Date: 01/10/1986
  • Status: Expired due to Fees
First Claim
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1. A method of controlling the operation of an internal combustion engine comprising the steps of:

  • (a) sensing a temperature of said engine at a moment at which said engine is started;

    (b) sensing elapsed time from the moment at which said engine is started;

    (c) sensing said temperature of said engine at a moment at which the sensed elapsed time coincides with a predetermined period of time;

    (d) estimating the temperature of intake air being supplied to said engine, on the basis of the difference between values of said temperature of said engine sensed at the steps (a) and (c); and

    (e) controlling the operation of said engine in accordance with the estimated temperature of the intake air.

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