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Engine-out emissions controls

  • US 10,100,768 B2
  • Filed: 05/03/2016
  • Issued: 10/16/2018
  • Est. Priority Date: 11/04/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • determining with a control system structured to control operation of an internal combustion engine system initial values for a plurality of combustion reference parameters;

    determining with the control system a first difference between an engine-out NOx value for the engine and a target engine-out NOx value and a second difference between an engine-out AFR value for the engine and a target engine-out AFR value;

    providing the first difference and the second difference to both a correction factor control component and a weighting factor control component, the correction factor control component and the weighting factor control component being in parallel control paths of a feedback control loop;

    selecting with the correction factor control component which if any of the initial values to modify based upon the first difference and the second difference;

    determining with the control system respective modification values for each of the initial values which is selected, the act of determining being performed by applying weighting factors determined by the weighting factor control component to the initial values selected by the control factor correction component;

    modifying with the control system each of the initial values which is selected based upon the one or more respective modification values to provide respective modified values; and

    determining with the control system one or more actuator control values based upon the values of the combustion reference parameters including the one or more modified values; and

    controlling with the control system at least one of an air handling system actuator and a fueling system actuator utilizing the one or more actuator control values.

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