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EXHAUST GAS RECIRCULATION CONTROL SYSTEMS AND METHODS FOR LOW ENGINE DELTA PRESSURE CONDITIONS

  • US 20130268176A1
  • Filed: 04/05/2012
  • Published: 10/10/2013
  • Est. Priority Date: 04/05/2012
  • Status: Abandoned Application
First Claim
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1. An engine control system for a vehicle, comprising:

  • a partial pressure determination module that;

    determines a first partial pressure of oxygen in an intake manifold of an engine based on an output of a first oxygen sensor measuring oxygen in the intake manifold; and

    determines a second partial pressure of oxygen in an exhaust system based on an output of a second oxygen sensor measuring oxygen in the exhaust system;

    a concentration determination module that;

    determines a concentration of oxygen in the intake manifold based on the first partial pressure and an intake manifold; and

    determines a concentration of oxygen in the exhaust system based on the second partial pressure;

    a flowrate determination module that determines a mass flowrate of exhaust gas recirculation (EGR) based on the concentration of oxygen in the intake manifold and the concentration of oxygen in the exhaust system; and

    an actuator control module that controls an engine operating parameter based on the mass flowrate of EGR.

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