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Internal combustion engine pneumatic state estimator

  • US 5,845,627 A
  • Filed: 05/30/1997
  • Issued: 12/08/1998
  • Est. Priority Date: 05/30/1997
  • Status: Expired due to Fees
First Claim
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1. A method for estimating pneumatic states including a gas pressure state within an internal combustion engine system having a plurality of gas flow branches, comprising the steps of:

  • defining a pneumatic node within an engine system through which gasses flow along at least two gas flow branches;

    estimating gas flow along the at least two gas flow branches;

    combining the estimated gas flows to form a net flow of gasses at the defined pneumatic node; and

    estimating gas pressure at a predetermined pneumatic node within the engine system as a predetermined function of the net flow of gasses.

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