Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

A Study of the Reduction of Diesel-Engine Emissions for Off-Road Vehicles

비도로 차량용 디젤엔진의 배기가스 저감에 관한 연구

  • Cho, Gyu-Baek (Dept. of Engine Research, Korea Institute of Machinery & Materials) ;
  • Kim, Hong-Suk (Dept. of Engine Research, Korea Institute of Machinery & Materials) ;
  • Kang, Jeong-Ho (Center of Green Fuel Technology, Korea Automotive Technology Institute)
  • 조규백 (한국기계연구원 그린동력연구실) ;
  • 김홍석 (한국기계연구원 그린동력연구실) ;
  • 강정호 (자동차부품연구원 그린연료기술센터)
  • Received : 2010.12.13
  • Accepted : 2011.03.14
  • Published : 2011.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

To meet the requirements of the Tier 4 interim regulations for off-road vehicles, emissions of particulate matter (PM) and nitrogen oxides (NOx) must be reduced by 95% and 30%, respectively, compared to current regulations. In this research, both the DPF and HPL EGR systems were investigated, with the aim of decreasing the PM and NOx emissions of a 56-kW off-road vehicle. The results of the experiments show that the DOC-DPF system is very useful for reducing PM emissions. It is also found that the back pressure is acceptable, and the rate of power loss is less than 5%. By applying the HPL EGR system to the diesel engine, the NOx emissions under low- and middle-load conditions are reduced effectively because of the high differential pressure between the turbocharger inlet and the intake manifold. The NOx emissions can be decreased by increasing the EGR rate, but total hydrocarbon (THC) emission increases because of the increased fuel consumption needed to compensate for the power loss caused by EGR and DPF.

비도로 차량용 디젤엔진의 Tier 4 interim 규제를 만족하기 위하여 입자상물질과 질소산화물 배출량은 현행 규제 대비 각각 95%, 30% 저감되어야 하며, 입자상 물질을 저감하기위한 방법으로 디젤산화촉매, 부분유량 매연 여과장치 및 매연여과장치가 비도로 차량용 디젤엔진에 적용될 수 있다. 또한 질소산화물을 저감하기위해 배기가스 재순환방법, 선택적 환원촉매와 희박 질소산화물 포집장치 등이 적용될 수 있다. 본 연구에서는 56kW급 off-road 차량에서의 입자상물질과 질소산화물을 저감하기위해 매연여과장치와 고압루프 배기가스재순환 시스템이 연구되었다. 실험결과로서 디젤산화촉매와 매연여과장치는 입자상물질을 저감하는데 매우 효과적이었으며 낮은 배압과 함께 출력손실도 5%이내였다. 고압루프 배기가스재순환을 적용한 결과 중 저부하 조건에서 효과적으로 질소산화물을 저감하였으며 배기가스재순환율이 높을수록 질소산화물의 저감율도 증가하였다.

Keywords

References

  1. Jeong, Y. and Kim, H., 2008, "Trend of Diesel Particulate Filter Trap Technology," KSAE, Auto journal Vol. 30, No. 1, pp. 55-61.
  2. Vincent, M. W., Richards, P. J. and Rogers, T. J., 2002, "Effective Particulates Reduction in Diesel Engines through the Use of Fuel Catalyzed Particulate Filter," Int. J. Automotive Technology, Vol. 3, No. 1, pp. 1-8.
  3. Kong, Y., Kozakiewicz, T., Hohnson, R., Huffmeyer, C., Huckaby, J., Abel, J., Baurley, J. and Duffield, K., 2005, "Active DPF Regeneration for 2007 Diesel Engines," SAE 2005-01-3509.
  4. Langridge, S. and Fessler, H., 2002, "Strategies for High EGR Rates in a Diesel Engine," SAE 2002-01-0961.
  5. Dronniou, N. and Higelin, P., 2005, "Combination of High EGR Rates and Multiple Injection Strategies to Reduce Pollutant Emissions," SAE 2005-01-3726.
  6. Niemi, S. A., Lauren, M. J. and Murtonen, T. T., 2002, "Effect of Waste-Gate Turbocharging on the Exhaust Particulate Matter of an Off-Road Diesel Engine," 2002-01-2159.
  7. Muller, M., 2008, "Estimation and Control of Turbocharged Engines," SAE 2008-01-1013.
  8. Kang, J., Nam, D., Jeong, G., Cho, G., Jang, Y., Kim, M. and Park, S., 2010, "A Study on the Application of EGR System to Decrease the NOx emission of Off-Road Vehicle Diesel Engine," KSAE10- B0089(1).

Cited by

  1. Study on Optimization of Fuel Injection Parameters and EGR Rate of Off-road Diesel Engine by Taguchi Method vol.22, pp.7, 2014, https://doi.org/10.7467/KSAE.2014.22.7.084