Use diagnostic system and the method for NOx sensor

Use diagnostic system and the method for NOx sensor

  • CN 101,994,588 B
  • Filed: 08/24/2010
  • Issued: 03/16/2016
  • Est. Priority Date: 08/24/2009
  • Status: Active Grant
First Claim
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1. an engine system, comprising:

  • Position control module, a NO in the exhaust that described position control module produces based on motor xlevel to change in camshaft phase shifter and EGR valve at least one position;

    NO xestimation module, described NO xestimation module to estimate in camshaft phase shifter and EGR valve after at least one change in location in scheduled time slot NO in exhaust xamount, wherein estimate NO xamount is based on the multiple predetermined NO corresponding with the multiple change in location of at least one in camshaft phase shifter and EGR valve xamount;

    With Diagnostic module, described diagnostic module is based on predetermined threshold and estimate NO xamount and the 2nd NO xdifference between level to determine in camshaft phase shifter and EGR valve at least one state, wherein the first and second NO xlevel uses NO xsensor is measured.

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