This paper analyzes the use of an ammonia sensor for feedback control in diesel exhaust systems. We build our case around the specific example of the heavy duty transient cycle, and an exhaust system with an SCR catalyst, a single urea injector and an upstream and downstream NOx sensor. A key component in our analysis is the inclusion of the tolerance of the ammonia sensor. We show that with the current understanding of the sensor tolerance, the ammonia sensor has limited benefit for controls.
On the Utility of Ammonia Sensors for Diesel Emissions Control
Sae Technical Papers
WCX SAE World Congress Experience ; 2022
2022-03-29
Conference paper
English
On the Utility of Ammonia Sensors for Diesel Emissions Control
British Library Conference Proceedings | 2022
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