A Study on the Urea-Water Solution Dosing Strategy by NO/NO
X
Ratio of DeNO
X
SCR System
2015-01-0057
In this study, SCR system is employed to selectively reduce NOX that is a major cause of environmental pollution from diesel engines. In particular, this paper focuses on urea injection strategies dependent on NO/ NOX ratio. An injection control algorithm is developed based on the chemical ratio between the amount of engine out NOX data obtained from Engine Management System (EMS) and the amount of NH3. Therefore, in order to decide the amount of injection quantity, the NO/NOX ratio from the engine out NOX should be considered in order to minimize NH3 slip while maximizing NOX reduction.
Experiments are conducted with a 2.2-liter diesel engine for passenger vehicles with Diesel Oxidation Catalyst (DOC) and Diesel Particle Filter (DPF). Real time control, using Pulse Width Modulation (PWM) duty ratio for dosing module and supply module, is performed by real time computer with its injection control algorithm developed in the Matlab Simulink environment. By analyzing the NOX emission measurement the performance of the proposed injection strategy algorithm is verified.
Citation: Park, J., Choi, D., Kang, Y., Lee, S. et al., "A Study on the Urea-Water Solution Dosing Strategy by NO/NOX Ratio of DeNOX SCR System," SAE Technical Paper 2015-01-0057, 2015, https://doi.org/10.4271/2015-01-0057. Download Citation
Author(s):
Jooyoung Park, Daehyun Choi, Yeonsik Kang, Seangwock Lee, Yongseok Cho, Taemin Kim
Affiliated:
Kookmin University, R&D Center E&D Co. Ltd
Pages: 8
Event:
18th Asia Pacific Automotive Engineering Conference
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Diesel / compression ignition engines
Emissions measurement
CAD, CAM, and CAE
Mathematical models
Nitrogen oxides
Selective catalytic reduction
Particulate matter (PM)
Catalysts
Slip
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