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Method for predicting R-step ahead engine state measurements

  • US 5,094,213 A
  • Filed: 07/18/1991
  • Issued: 03/10/1992
  • Est. Priority Date: 02/12/1991
  • Status: Expired due to Term
First Claim
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1. An engine--powertrain--controller combination, comprising:

  • a powertrain receiving power from said engine and including a transmission;

    means for determining measures of a set of engine parameters and for providing measurement signals indicative of said measures; and

    a microprocessor control unit, including (i) means for receiving the measurement signals, (ii) means for predicting a prediction set including at least one predicted value of a desired engine state, and (iii) means for controlling the vehicle engine--powertrain in response to the prediction set, providing improved control of an engine--powertrain parameter comprising;

    air-fuel ratio, engine idle speed, engine speed, spark timing, or transmission gear selection, whereinthe microprocessor control unit iteratively (i) determines the prediction set in response to (a) the measurement signals, (b) a linear model comprising a set of fixed predetermined model parameters, and (c) an estimation set including at least one estimated value of the desired engine state, and (ii) determines the estimation set in response to (a) a present measure of the desired engine state, (b) the prediction set, and (c) a correction set of fixed predetermined correction coefficients wherein the predicted value of the desired engine state is a substantially accurate prediction of the desired engine state'"'"'s future value.

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