Improvement of NOx reduction rate of urea-SCR system by NH3 adsorption quantity control

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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)


A urea SCR system was combined with a DPF system to reduce NOx and PM in a four liters turbocharged with intercooler diesel engine. Significant reduction in NOx was observed at low exhaust gas temperatures by increasing NH3 adsorption quantity in the SCR catalyst. Control logic of the NH3 adsorption quantity for transient operation was developed based on the NH3 adsorption characteristics on the SCR catalyst. It has been shown that NOx can be reduced by 75% at the average SCR inlet gas temperature of 158 deg.C by adopting the NH3 adsorption quantity control in the JE05 Mode.

Original languageEnglish
Title of host publicationSAE Technical Papers
Publication statusPublished - 2008
EventPowertrains, Fuels and Lubricants Meeting - Rosemont, IL
Duration: 2008 Oct 62008 Oct 9


OtherPowertrains, Fuels and Lubricants Meeting
CityRosemont, IL

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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