P_2520

Sensors & Transducers, Vol. 182, Issue 11, November 2014, pp. 168-173 168 S S S e e e n n n s s s o o o r r r s s s & & & T T r r r a a a n n n s s s d d d u u u c c c e e e r r r s s s © 2014 by IFSA Publishing, S. L. http://www.sensorsportal.com Simulation and Optimization of SCR System for Direct-injection Diesel Engine 1 Guanqiang Ruan, 2 Zhendong Zhang, 1 Jinrun Cheng 1 Shanghai Dianji University, No. 88, Wenjing Road, Minhang District, Shangshi, 200245, China 2 University of Shanghai for Science and Technology, No. 516, Jungong Road, Yangpu District, Shangshi, 200093, China 1 Tel.: +86-021-64300980 E-mail: [email protected] Received: 24 July 2014 /Accepted: 30 October 2014 /Published: 30 November 2014 Abstract: The turbo diesel SCR system has been researched and analyzed in this paper. By using software of CATIA, three-dimensional physical model of SCR system has been established, and with software of AVL-FIRE, the boundary conditions have been set, simulated and optimized. In the process of SCR system optimizing, it mainly optimized the pray angle. Compare the effects of processing NO to obtain batter optimization results. At last the optimization results are compared by bench test, and the experimental results are quite consistent with simulation. Copyright © 2014 IFSA Publishing, S. L. Keywords: SCR, Simulation, Optimization, Experiment. 1. Introduction The diesel engine gets higher thermal efficiency, lower fuel consumption and CO2 emissions than the gasoline engine. Presently the diesel engines are applied in all of the heavy trucks and most of the light truck. However, as the standard of diesel emissions get to be more and more rigorous all around the world, emission control of diesel particulate matter (PM) and NOx becomes the key to the development of diesel engine technology. Using high pressure injection technology can reduce PM emissions of combustion in cylinder, and then take the Selective Catalytic Reduction (SCR) technology to control NO x as the main way of electronic-control diesel engine exhaust gas processing [1]. The SCR technology path is shown in Fig. 1. But there are some problems in the matching between the SCR and domestic diesel engine, the optimization of SCR is imminent. In this article, with the software of FIRE, it has simulated the SCR process of exhaust, optimized the structure parameters of SCR and verified by experiment at the same time. Fig. 1. SCR technology path. http://www.sensorsp ortal.com/HTML /DIGEST/P_252 0.htm

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P_2520