Abstract




 
   

Vol. 11, No. 2 (May 1998) 115-120   

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  INVESTIGATION OF THE EFFECT OF EXHAUST GAS RECIRCULATION (EGR) ON POLLUTANTS EMISSION FROM SI ENGINE EXHAUST GASESE (RESEARCH NOTES)
 
 
V.S. Efendiev, V. Pirouzpanah, Y. Ajabshirchy and A. Mohammadi

Department of Mechanical Engineering
University of Tabriz
Tabriz, Iran

M. Dehkhargani

Research Department
Mega Motor Company
Tehran, Iran

 
 
 
 

Abstract    This paper reports the results of an experimental investigation on the effect of the EGR on the pollutants emission, especially on oxides of nitrogen, from the exhaust gases and performance of the spark ignition engine. Also along with experimental work, a mathematical model for the determination of the effect of EGR on the peak cycle temperature and for the prediction of its effect on the NOx emission is constructed. The results of theoretical calculation show how peak temperature of theoretical cycle decreased with increasing of the recycling gas percentage. Tests were conducted on a four stroke petrol engine used in passenger cars. The experimental investigations show that NOx emission decreases with increasing of the percentage of the recycling gas. At 9% recycling, 73% of NOx emissions decreased at EGR valve opening 360 degrees. Brake specific fuel consumption and brake power are changed negligibly.

 

Keywords    Emission Control, EGR, SI Engines, Pollutants

 

References   

 
1. Chernyak, B. Y., Arsharski, E. Y. and Shiynor, M. Q. "The Effect of Exhaust Gas Recirculation on the Working Process and of NOx Emissions from SI Engine Exhaust Gases"; Proc. Machine-buiding Inst. Toxic of the International Combustion Engine, Moscow, (1977), 110-114.
2. Murthy, N. S.and Sastry, V. S. "Control of Oxides of Nitrogen from SI Engine Exhaust by Exhaust Gas Recirculation"; Journal Mechanical Engineering, Vol. 57, (1976), 45-50.
3. Pirouzpanah, V., Efendiev, V. S. and Ajabshirchi, Y. "Theoretical Investigation of the Effect of EGR on the NOx Formation in Petrol Engines"; Proc. 1st. Conf. on Environment and Vehicle, Tehran, Vol. 1, (1995).





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