한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제20권5호
  • /
  • Pages.88-94
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  • 2012
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  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
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다운 스피딩이 NEDC 모드 연비에 미치는 기여도 산출에 관한 연구

Analysis of Down Speeding Effect on Fuel Economy during NEDC

  • 심범주 (경희대학교 대학원 기계공학과) ;
  • 박경석 (경희대학교 기계공학과) ;
  • 박준수 (쌍용자동차 기술연구소)
  • Shim, Beom-Joo (Department of Mechanical Engineering, Graduate School, Kyunghee University) ;
  • Park, Kyoung-Suk (Department of Mechanical Engineering, Kyunghee University) ;
  • Park, Jun-Su (R&D Center, Ssangyong Motor Company)
  • 투고 : 2011.11.18
  • 심사 : 2012.02.07
  • 발행 : 2012.09.01
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초록

Development trend of modern HSDI diesel engine is now focusing on low fuel consumption and emission because of strong interest in global environmental protection. Two big branches of criteria for modern diesel engine development are down sizing and down speeding. Down sizing keeps engine operation condition to the direction of higher load and thus pursuing for better thermal efficiency. But this may cause degraded vehicle dynamic performance because of reduced back up torque. Down speeding keeps engine operation condition to the direction of slightly higher load and lower engine speed. Therefore reduction of back up torque can be limited within flat torque area. This study analyzed fuel economy effect of down speeding on a vehicle powered by HSDI diesel engine in aspect of engine friction work, intake and exhaust pumping work, exhaust hat loss and thermal loss of fuel leakage of fuel injection system. Contribution factor of each engine and vehicle related parameters under basic and down speeding condition were compared and work balance of down speeding during NEDC was analyzed.

키워드

참고문헌

  1. H. Choi and K. Min, "The Down-sizing for the Better Fuel Efficiency of HSDI Diesel Engines," Auto Journal, KSAE, Vol.30, No.6, pp.28-33, 2008.
  2. S. Park, H. Heo, S. Yoon and J. Chun, "Downsizing-concept EURO-V Diesel Engine Development for $CO_{2}$ Regulation," Spring Conference Proceedings, KSAE, KSAE11-B0002, pp.8-16, 2011.
  3. European Automobile Manufacturers Association, European Automobile Industry Report 2009, pp.14-17, 2009.
  4. T. V. Johnson, "Diesel Emission Control in Review," SAE 2009-01-0121, 2009.
  5. G. Lim, H. Wi, J. Park, J. Lee and K. Park, "Effect of Engine Friction on Vehicle Fuel Economy during Warm-up," Transactions of KSAE, Vol.16, No.6, pp.109-114, 2008.
  6. M. Choi, J. Kim and S. Cho, "The Effect of Various Factors of Diesel Engine on Decreasing Fuel Consumption," Conference Proceedings KSAE, KSAE08-S0064, pp.392-397, 2008.
  7. K. Park, H. Suh, S. Park, I. Kim and S. Jang, "Effects of Warm-up Performance on SI Engine with Exhaust Heat Recovery System," Transactions of KSAE, Vol.19, No.6, pp.53-60, 2011.
  8. H. Suh, K. Kim, S. Jang and K. Park, "Study on the Warming-up Performance of the Engine with Exhaust Heat Recovery System," Annual Conference Proceedings, KSAE, KSAE10-A0118, pp.713-720, 2010.
  9. J. B. Heywood, Internal Combustion Engine Fundamentals, McGraw-Hill, New York, pp. 262-271, 1988.