Transactions of Society of Automotive Engineers of Japan
Online ISSN : 1883-0811
Print ISSN : 0287-8321
ISSN-L : 0287-8321
Technical Paper
Development of Urea SCR Catalyst Monitoring Method
Taiga Hagimoto, Yukihiro Sonoda, Toru Kidokoro, Hiroshi Sawada, Daisuke Shibata, Kenichi Fujiki
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Keywords: Diesel Engine, Exhaust System, Catalyst, Urea SCR, OBD, Monitoring, Deterioration, Malfunction, Detection
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2010 Volume 41 Issue 3 Pages 667-672

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Abstract
According to the worldwide enhancement of emission regulation, auto manufacture adopts Urea SCR system on bigger diesel engines and is required to develop its OBD monitoring method.
This paper investigates the accuracy improvement of NOx conversion ratio determination as SCR catalyst deterioration detection parameter by analysing the internal NOx conversion mechanism of the catalyst.
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© 2010 Society of Automotive Engineers of Japan, Inc.
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