NOx reduction mechanism and requirements for high NOx reduction efficiency in a urea SCR system at transient conditions with low exhaust gas temperature were investigated by using a four liters multi-cylinder diesel engine. NOx can be significantly reduced by adjusting mode-overall SCR inlet NO2/NOx ratio at 0.5±0.1 while adopting NH3 adsorption quantity control. It has been shown that ammonium nitrate (NH4NO3) plays an important role in enhancing the Fast SCR reaction at transient low exhaust gas temperature conditions.
|ジャーナル||Review of Automotive Engineering|
|出版ステータス||Published - 2010|
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