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GENERATION OF REFERENCE VALUE FOR VEHICLE FAILURE DIAGNOSIS

  • US 20110196572A1
  • Filed: 09/09/2009
  • Published: 08/11/2011
  • Est. Priority Date: 10/10/2008
  • Status: Active Grant
First Claim
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1. A reference value generating apparatus for failure diagnosis in which time sequence ECU data for a plurality of driving parameters during the occurrence of a failure stored in a storage device of an electronic control unit (ECU) of a vehicle is compared with reference values when the failure of the vehicle occurs, to make a failure diagnosis of the vehicle, comprising:

  • an accumulation unit for sequentially accumulating and storing the time sequence ECU data obtained from a large number of vehicles;

    means for generating numerical vectors of the time sequence ECU data accumulated in the accumulation unit;

    clustering means for clustering the numerical vectors and classifying the clustered numerical vectors into a plurality of clusters according to the characteristics;

    an occurrence rate calculating means for finding a range of high occurrence rate values for the parameter values of the driving parameters in the plurality of clusters; and

    means for storing the range of high occurrence rate values obtained in the occurrence rate calculating means, as a range of normal values of the driving parameters,wherein the range of normal values is set as a reference value for failure diagnosis.

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