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Adaptive air charge estimation based on support vector regression

  • US 8,880,321 B2
  • Filed: 03/07/2011
  • Issued: 11/04/2014
  • Est. Priority Date: 03/07/2011
  • Status: Expired due to Fees
First Claim
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1. A method of estimating an air charge for an engine, the method comprising:

  • providing an air model for the engine, the air model including both a throttle model and a cylinder flow model,the cylinder flow model being a linear programming support vector regression (LP-SVR) model including a plurality of support vectors having associated weighting parameters;

    transforming the air model to a linear parametric air model to allow online support vector regression learning;

    determining the support vectors and the weighting parameters for the LP-SVR model using steady-state engine operation data;

    adjusting the weighting parameters, while online, using a set of transient driving cycle data; and

    estimating the air charge during engine operation using the air model,wherein the linear parametric air model is established without using signal derivatives and expressed as;

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