A study on the improvement of NOx reduction efficiency for a urea SCR system (Third report) - High NOx reduction efficiency mechanism at transient low exhaust gas temperature operation

Yutaka Murata, Sadahito Tokui, Ryo Komiya, Atsushi Kaneko, Yasuhiro Daisho, Hisakazu Suzuki, Hajime Ishii

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)103-110
Number of pages8
JournalReview of Automotive Engineering
Volume31
Issue number2
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Automotive Engineering

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