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System and Method for Estimating Engine Exhaust Nitrogen Oxide Sensor Instability

  • US 20190331044A1
  • Filed: 04/25/2018
  • Published: 10/31/2019
  • Est. Priority Date: 04/25/2018
  • Status: Active Grant
First Claim
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1. A vehicle, comprising:

  • an engine;

    an exhaust system connected to the engine and receiving exhaust gasses therefrom, the exhaust system having an exhaust aftertreatment system;

    an Engine Out Nitrogen Oxide (EONOx) sensor connected to the exhaust system and providing a signal indicating Nitrogen Oxide (NOx) content in the exhaust gasses to at least one controller, the at least one controller being configured to;

    predict instability in the EONOx sensor signal,validate the predicted instability in the EONOx sensor signal, andupon prediction and validation of instability in the EONOx sensor signal, latch the EONOx sensor signal to a stable value.

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