Diesel Exhaust Fluid Dosing Analysis in Bharat Stage VI Commercial Vehicle Engine

Abstract

Ammonia reacts with nitrogen oxides in the exhaust flue gases to produce nitrogen and water vapours. This reaction occurs inside the catalyst convertor and is very much temperature dependent. The present work predicts the catalyst temperature profiles different engine startup conditions. This has been studied theoretically and experimentally and the results have been compared to draw conclusions. Further, experiments have been carried out to assess how the ammonia dosing rates at fixed engine performance parameters impact the conversion efficiency. Finally, ammonia dosing map has been presented which may be used in catalyst performance tuning.