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

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

^*この研究の対応する著者

次世代自動車研究機構

研究成果: Article › 査読

2 被引用数 (Scopus)

抄録

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.

本文言語	English
ページ（範囲）	19-26
ページ数	8
ジャーナル	Review of Automotive Engineering
巻	30
号	1
出版ステータス	Published - 2009

ASJC Scopus subject areas

自動車工学

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引用スタイル

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AU - Takeshita, Kiyoto

AU - Daisho, Yasuhiro

AU - Suzuki, Hisakazu

AU - Ishii, Hajime

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AB - 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.

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