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Adaptive learning control for engine intake air flow

  • US 5,080,064 A
  • Filed: 04/29/1991
  • Issued: 01/14/1992
  • Est. Priority Date: 04/29/1991
  • Status: Expired due to Fees
First Claim
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1. An adaptive learning control method for regulating the quantity of intake air flowing into a fuel injected internal combustion engine to achieve a scheduled air-fuel ratio, where the amount of fuel supplied to each engine cylinder is determined directly as a function of the operator demand for engine output, with the engine having a plurality of operating regions defined by its operating parameters, the steps of the method comprising:

  • deriving an indication of the actual mass of air inducted into each engine cylinder;

    deriving an indication of a desired mass of air for each engine cylinder, which corresponds to the scheduled air-fuel ratio;

    determining the region in which the engine is operating based upon the engine operating parameters;

    obtaining a value for a previously stored learning correction that corresponds to the region in which the engine is operating;

    adjusting the quantity of intake air flowing into the engine as a function of at least the learning correction value, to reduce the difference between the indications for the actual and desired mass of air for each engine cylinder; and

    updating the value of the stored learning correction as a function of the difference between the indications for the actual and desired mass of air for each engine cylinder.

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