Virtual emissions monitor for automobile and associated control system

  • US 5,682,317 A
  • Filed: 07/23/1996
  • Issued: 10/28/1997
  • Est. Priority Date: 08/05/1993
  • Status: Expired due to Term
First Claim
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1. A method for controlling the operation of an internal combustion engine to minimize emissions therefrom, comprising the steps of:

  • storing in a predictive model a representation of the internal combustion engine, the predictive model having an output that provides a prediction of the emissions emitted by the engine and operable to receive as inputs sensor output values from a plurality of sensors that are operable to measure select parameters of the engine operation as the sensor output values;

    inputting select ones of the sensor output values to the predictive model;

    predicting the emission level of the engine to provide an indication of the noxious pollutants output by the engine;

    comparing the emissions level with a threshold;

    when the predicted emissions level exceeds the threshold, determining control values, which control values are utilized to control the operation of the engine and vary the operating parameters thereof; and

    determining if the adjusted control values exceed a predetermined control limit and, if so, setting a default value for the control values and, if not, applying the determined control values to the engine.

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