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METHOD AND APPARATUS TO MONITOR A MASS AIRFLOW METERING DEVICE IN AN INTERNAL COMBUSTION ENGINE

  • US 20110178693A1
  • Filed: 01/21/2010
  • Published: 07/21/2011
  • Est. Priority Date: 01/21/2010
  • Status: Active Grant
First Claim
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1. Method for operating an internal combustion engine configured to operate in a controlled auto-ignition combustion mode and equipped with a mass airflow metering device, the method comprising:

  • monitoring an engine combustion state;

    monitoring states of engine operating parameters;

    calculating a nominal intake air mass flowrate corresponding to the states of the engine operating parameters;

    estimating an intake air mass flowrate corresponding to the nominal intake air mass flowrate and the engine combustion state;

    measuring intake air mass flowrate with the mass airflow metering device;

    comparing the estimated and measured intake air mass flowrates; and

    detecting a fault related to the mass airflow metering device when a difference between the estimated and measured intake air mass flowrates exceeds a predetermined threshold.

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