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Systems and methods of an on-board NOx monitor reset test

  • US 9,752,488 B2
  • Filed: 10/27/2015
  • Issued: 09/05/2017
  • Est. Priority Date: 10/27/2015
  • Status: Active Grant
First Claim
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1. An electronic controller, comprising:

  • a stationary conditions circuit structured to received information indicative of a stationary condition of a vehicle having an exhaust aftertreatment system;

    an engine circuit coupled to the stationary conditions circuit, wherein the engine circuit is structured to cause an elevated operating mode in response to the detection of the stationary condition; and

    a nitrous oxide (NOx) monitor reset circuit communicably coupled to the stationary conditions circuit and the engine circuit, wherein the NOx monitor reset circuit is structured to;

    receive vehicle operation data indicative of an enable condition for a NOx monitor reset process;

    in response to the enable condition, receive NOx data indicative of a measured NOx amount exiting the exhaust aftertreatment system as part of the NOx monitor reset process;

    estimate a NOx amount exiting the exhaust aftertreatment system as part of the NOx monitor reset process;

    compare the measured NOx amount to the estimated NOx amount; and

    in response to the comparison, selectively diagnose the exhaust aftertreatment system as one of a healthy and a degraded exhaust aftertreatment system.

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