Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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The Effect of Multiple Injections on the Stability of Combustion and Emissions Characteristic in a Passenger Car Diesel Engine

승용차 디젤엔진의 연료 다단 분사가 연소 안정 및 배출물 특성에 미치는 영향

  • Published : 2007.07.01
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Abstract

This paper described the effect of the multiple injections on the stability of combustion and emission characteristics in a direct injection diesel engine at various operating conditions. In order to investigate the influence of multiple injections in a diesel engine, the fuel injection timing was varied one main injection and two pilot injections at various conditions. The experimental apparatus consisted of DI diesel engine with four cylinders, EC dynamometer, multi-stage injection control system, and exhaust emissions analyzer. The combustion and emission characteristics were analyzed for the main, pilot-main injection, pilot-pilot-main injection strategies. It is revealed that the combustion pressure was smoothly near the top dead center and the coefficient of variations is reduced due to the effect of pilot injection. Also, $NO_x$ emissions are dramatically decreased with pilot injection because the decrease of rate of heat release. However, the soot is increased at early pilot injection and main injection.

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References

  1. A. Trueba, B. Barbeau, O. Pajot and K. Mokaddem, 'Pilot Injection Timing Effect on the Main Injection Development and Combustion in a DI Diesel Engine,' SAE 2002-01- 0501, 2002
  2. C. Y. Choi and R. D. Reitz, 'An Experimental Study on the Effect of Oxygenated Fuel Blends and Multiple Injection Strategies on DI Diesel Engine Emissions,' Fuel, Vol.78, pp.1303-1317, 1999 https://doi.org/10.1016/S0016-2361(99)00058-7
  3. R. Papagiannakis and D. T. Hountalas, 'Combustion and Emission Characteristics of a Dual Compression Ignition Engine Operated Pilot Diesel Fuel and Natural Gas,' Energy Conversion & Management, Vol.45, pp.2971-2978, 2004 https://doi.org/10.1016/j.enconman.2004.01.013
  4. T. Tanaka, A. Ando and K. Ishizaka, 'Study on Pilot Injection of DI Diesel Engine using Common-rail Injection System,' JSAE Review Vol.23, pp.297-302, 2002 https://doi.org/10.1016/S0389-4304(02)00195-9
  5. M. Y. Kim, D. J. Lee, H. G. Roh, J. H. Lee and C. S. Lee, 'Effect of Injection Parameters on Combustion and Exhaust Emission Characteristics in a Small Common-rail Diesel Engine,' Transactions of KSAE, Vol.12, No.6, pp.9-15, 2004
  6. D. A. Nehmer and R. D. Reitz, 'Measurement of the Effect of Injection Rate and Split Injections on Diesel Engine Soot and $NO_X$ Emissions,' SAE 940668, 1994
  7. P. Carlucci, A. Ficarella and D. Laforgia, 'Effect of Pilot Injection Parameters on Combustion for Common Rail Diesel Engines,' SAE 2003-01-0700, 2003