A study on the improvement of NOx reduction efficiency for a urea SCR system (first report) -A concept of NH 3 adsorption quantity control and its application with transient operation

Yutaka Murata, Sadahito Tokui, Soichiro Watanabe, Kiyoto Takeshita, Yasuhiro Daisho, Hisakazu Suzuki, Hajime Ishii

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A urea SCR system was combined with a DPF system to reduce NOx and PM in a four-liter turbocharged intercooler diesel engine. Significant reduction in NOx was observed at low exhaust gas temperatures by increasing the NH 3 adsorption quantity in the SCR catalyst. Control logic of the NH 3 adsorption quantity for transient operation was developed based on the NH 3 adsorption characteristics in the SCR catalyst. It has been shown that NOx can be reduced by 75% at an average SCR inlet gas temperature of 158 deg C by adopting an NH 3 adsorption quantity control in the JE05 mode.

Original languageEnglish
Pages (from-to)19-26
Number of pages8
JournalReview of Automotive Engineering
Volume30
Issue number1
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Automotive Engineering

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