尿素SCRシステムのNOx浄化率向上に関する研究(第1報) －NH<SUB>3</SUB>吸着量制御のコンセプトと過渡運転への適用－

村田 豊; 徳井 貞仁; 渡辺 聡一郎; 竹下 清人; 大聖 泰弘; 鈴木 央一; 石井 素

doi:10.11351/jsaeronbun.39.5_27

Research Paper

A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System(First Report)

-A Concept of NH₃ Adsorption Quantity Control and its Application to Transient Operation-

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

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Keywords: Diesel Engine, Emission, Catalyst/Aftertreatment, Urea SCR, NOx

JOURNAL FREE ACCESS

2008 Volume 39 Issue 5 Pages 5_27-5_32

DOI https://doi.org/10.11351/jsaeronbun.39.5_27

Details

Abstract

A urea SCR system was combined with a DPF system to reduce NOx and PM in a 4L turbocharged with intercooler diesel engine. Significant reductions in NOx were realized at low exhaust gas temperatures by increasing NH₃ adsorption quantity in the SCR catalyst. NH₃ adsorption control logic was developed for transient operations based on the NH₃ adserption characteristics. 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 control in the JE05 made.

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