System and method for monitoring urea level

System and method for monitoring urea level

  • CN 101,566,490 B
  • Filed: 02/09/2009
  • Issued: 11/28/2012
  • Est. Priority Date: 02/08/2008
  • Status: Active Grant
First Claim
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1. sensor diagnostic system comprises:

  • First, second and the 3rd dispensing agent sensor;

    It indicates the dispensing agent whether to be present in first, second and the 3rd volume liquid level place of dispensing agent jar respectively;

    The wherein said second volume liquid level is greater than the said first volume liquid level, and said the 3rd volume liquid level is greater than the said second volume liquid level;

    Pump pressure sensor, it is used for the pump pressure of sensing dispensing agent pump, and this dispensing agent pump is arranged in the dispensing agent jar, is used for the agent of pumping dispensing;

    WithControl module, its according to said first, second with the indication of the 3rd dispensing agent sensor come optionally to diagnose said first, second with the 3rd dispensing agent sensor at least one sensor in sensor fault,It is characterized in that change into that there is not said dispensing agent in indication and pump pressure that said pump pressure sensor senses during greater than predetermined pressure when the said first dispensing agent sensor, said control module diagnoses the said first dispensing agent sensor to have fault.

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