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연료 조성에 따른 공연비 산정 (I) -기준 배기 조성으로서 Eltinge 차트-

Determination of Air Fuel Ratio according to Fuel Composition (I) -Eltinge Chart as a Reference Exhaust Composition-

  • 엄인용 (서울산업대학교 기계공학과) ;
  • 박찬준 (서울산업대학교 기계공학과)
  • 발행 : 2003.11.01

초록

This paper is the first of several companion papers which compare the methods of Air-fuel ratio determination. There are many methods which calculate Air-Fuel ratio from exhaust emission. Most of them are based on the simple chemical equations, which use balance of atom, and the error of the calculation is negligible as far as the instrumentation accuracy is guaranteed. They assume homogeneous mixture and complete combustion to the extent of oxygen availability. Because of these simple assumptions, they cannot offer the information about the fuel distribution state and the malfunction of instrument. For these limitations, Eltinge offered new one based on stricter mathematical model. This result coincides with the others very well and gives more information about the mixture state and instrumentation. Consequently this might be a general solution for Air-fuel ratio determination and exhaust composition. The objects of the calculation, however, were not commercial fuels except gasoline and the compensation method of unburned hydrocarbon was not appropriate to recent analyzer. Moreover he did not consider the fuel which contains oxygen, such as methanol, ethanol and blend of gasoline-alcohol. In this paper, Eltinge chart is expanded to the arbitrary fuel composition as the reference exhaust compositions for the purpose of further discussions about Air-fuel ratio determination methods and the charts fur gasoline, diesel, methanol, M85, liquefied petroleum gas(LPG), natural gas(NG), propane, butane are illustrated.

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참고문헌

  1. Wongeun Lee, Inyong Ohm, 2001, 'Effects of the Method of Changing Compression ratio on Engine Performance in an SI Engine,' Transaction of Korea Society of Automotive Engineers, Vol 9, No.4, pp. 27-33
  2. John B. Heywood, 1988, 'Internal Combustion Engine Fundamentals,' McGraw-Hill, pp. 104
  3. R.S. Spindt, 1965, 'Air-Fuel Ratio From Exhaust Gas Analysis,' SAE paper 650507
  4. Donald L. Stivender, 1971, 'Development of a Fuel-Based Mass Emission Measurement,' SAE paper 710604
  5. L.S. Leonard, 1961, ' Fuel Distribution by Exhaust Gas Analysis.' Paper 379A presented at the summer meeting, St. Louis, Mo., June 5-9
  6. John B. Heywood, 1988, 'Internal Combustion Engine Fundamentals,' McGraw-Hill, p. 314
  7. Lamont Eltinge, 1968, 'Fuel-Air Ratio and Distribution from Exhaust Gas Composition,' SAE Paper 680114
  8. John B. Heywood, 1988, 'Internal Combustion Engine Fundamentals,' McGraw-Hill, pp. 145-152