Transactions of Society of Automotive Engineers of Japan
Online ISSN : 1883-0811
Print ISSN : 0287-8321
ISSN-L : 0287-8321
Technical paper
A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System (Fourth Report)
-Development of Urea Injection Control Logic and its Application to Various Transient Operations-
Yutaka Murata, Sadahito Tokui, Ryo Komiya, Yasuhiro Daisho, Hisakazu Suzuki, Hajime Ishii
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Keywords: Diesel Engine, Emission, Catalyst, Aftertreatment, Urea SCR, NOx, JE05, WHTC, WHSC
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2009 Volume 40 Issue 6 Pages 1515-1520

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Abstract
A urea SCR system was combined with a DPF system to reduce NOx and PM in a 4L turbocharged with intercooler diesel engine. Urea injection control logic was developed for various low temperature and high temperature transient operations. Significant reductions in NOx were realized in JE05 and WHTC modes by adopting the urea injection control. It has been shown that NOx can be reduced by 95%, achieving the challenge target value of NOx in JE05 mode.
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© 2009 Society of Automotive Engineers of Japan, Inc.
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