New Urea-SCR Control System for Super Clean Diesel | Zendy

Hisao Haga | Zendy; Eiji Hashimoto | Zendy; Koichi Nakajima | Zendy; Hideki Matsunaga | Zendy; Yuji Yasui | Zendy

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New Urea-SCR Control System for Super Clean Diesel

Author(s) -

Hisao Haga,

Eiji Hashimoto,

Koichi Nakajima,

Hideki Matsunaga,

Yuji Yasui

Publication year - 2015

Publication title -

journal of robotics and mechatronics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.257

H-Index - 19

eISSN - 1883-8049

pISSN - 0915-3942

DOI - 10.20965/jrm.2015.p0041

Subject(s) - urea , diesel fuel , catalysis , selective catalytic reduction , automotive engineering , diesel engine , nox , robustness (evolution) , chemistry , materials science , environmental science , engineering , organic chemistry , biochemistry , gene , combustion

Urea-SCR control system Diesel engines effectively reduce automotive CO 2 emissions. Technologies for reducing NO x emissions are also essential, however, for diesel engine use. The research discussed in this paper focuses on urea-SCR as after-treatment system for converting NO x , and proposes the urea-SCR control based on NH 3 sensor output. The NH 3 sensor effectively reduces both NO x , and NH 3 slip. The control adjusts the amount of urea dosed to the catalyst based on changes in NH 3 slip timing and NH 3 concentration in order to compensate for part-to-part variations in the SCR catalyst and catalyst aging. The proposed urea-SCR system using the NH 3 sensor and applied to a test vehicle increased NO x conversion performance and improved emission robustness over that of conventional control using a NO x sensor.

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