Research on the Injection Condition Calibration Process of a Common-rail DME Fueled Engine

4기통 커먼레일 DME 엔진의 분사조건 보정방법에 대한 연구

  • 정재우 (자동차부품연구원 동력시스템연구센터) ;
  • 강정호 (자동차부품연구원 동력시스템연구센터) ;
  • 김남호 (자동차부품연구원 동력시스템연구센터) ;
  • 정수진 (자동차부품연구원 동력시스템연구센터) ;
  • 이호길 (자동차부품연구원 동력시스템연구센터) ;
  • 강우 (자동차부품연구원 동력시스템연구센터)
  • Published : 2008.09.01

Abstract

As the management of fuel efficiency becomes globally reinforced in attempts to find an environment-friendly vehicle that will operate against global warming, the interest in and the demand for the type of vehicle with a high-efficiency diesel engine using light oil. However, it also emits a greater amount of PM (particulate matter) and NOx than emissions from vehicles using other types of fuels. Therefore, the DME (Dimethyl Ether), an oxygen containing fuel draws attention as an alternative fuel for light oil that can be used for diesel engines since it generates very little smoke. But to develop and compare performance of an electric controlled common-rail DME engine, engine tests requires optimized injection conditions at required engine RPM and engine torque. These injection conditions cannot be set freely and the data configuration through the experimentally repeated application requires much time as well as a significant amount of errors and effort. The object of this study is to configure the basic injection map using the results of the DME engine experiments performed so far. For this, in this study, the functionalization of the required equations were performed along with the basic review of the factors that had influence on the data map. Through this, the information on the injection pressure, injection amount, injection duration, injection timing, etc. under certain operation condition could be obtained.

Keywords

References

  1. Y. J. Lee and Y. K. Kim, "Status of Worldwide DME Engine Vehicle R & D," Auto Journal, KSAE, Vol.25, No.4, pp.27-32, 2003
  2. S.-H. Nam, Y.-J. Lee and Y.-K. Kim, "Effects of EGR rate on Exhaust Emission Characteristics of DI DME Engine," Spring Conference Proceedings, Vol.I, KSAE, pp.435-440, 2002
  3. J. S. Hwang, J. S. Ha and S. Y. No, "Spray Characteristics of DME in Conditions of Common rail Injection System(II)," Int. J. Automotive Technology, Vol.4, No.3, pp.119-124, 2003
  4. P. Kapus and H. Ofner, "Development of Fuel injection Equipment and Combustion System for DI Diesel Operated on Dimethyl Ether," SAE 950062, 1995
  5. T. Ikeda, Y. Ohmori, A. Takamura, Y. Sato, J. Li and T. Kamimoto, "Measurement of the Rate of Multiple Fuel Injection with Diesel Fuel and DME," SAE 2001-01-0527, 2001
  6. H. Teng, J. C. McCandless and J. B. Schneyer, "Thermochemical Characteristics of Dimethly Ether-An Alternative Fuel for Compressionignition Engines," SAE 2001-01-0154, 2001
  7. L. Gzzella and A. Amstutz, "Control of Diesel Engine," IEEE Control Systems, 0272-1708/98, pp.53-71, 1998