Browse > Article

The Comparison of Performance and Emission Characteristics between CNG Engine and Gasoline Engine  

김진영 (동아대학교 기계공학과 대학원)
박원옥 (동아대학교 기계공학과 대학원)
정성식 (동아대학교 기계산업시스템공학부)
하종률 (동아대학교 기계산업시스템공학부)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.11, no.2, 2003 , pp. 16-21 More about this Journal
Abstract
Natural gas is one of the promising alternative fuels because of the abundant deposits and the cleanness of emission gas. It can be used in conventional gasoline engine without major modification. Natural gas has some advantages than gasoline i.e. the high octane number, good mixing condition because of gas and wide inflamable limit. In the present study, a $1.8{\ell}$ conventional gasoline engine is modified for using the CNG as a fuel instead of gasoline. Performance and emission characteristics are compared between gasoline and CNG with 4 cylinder SI Engine which is controlled by programable ECU. Parameters of experimentation are equivalence ratio, spark timing and fuels. We analyzed the combustion characteristics of the engine using the cylinder pressure i.e. ignition delay, combustion duration and cycle variation. As a result, CNG engine shows lower exhaust emissions but brake torque is slightly reduced compared to gasoline engine. Overall combustion duration is longer than that of gasoline because of lower burning speed.
Keywords
Compressed natural gas; Emission; Alternative fuel; Performance;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Automotive LP Gas 3rd Edition, World LP Gas Association, 1998
2 B. S. Kim, Y. J. Lee, C. J. Koh, 'Performance Characteristics of CNG Vehicle at Various Compression Ratios,' Journal of KSAE, Vol.13, No.13, pp.49-57, 1991
3 NGV 94, International Gas Union, 1994
4 G. J. Waldron, R.G. Allen, 'Natural Gas of Vehicles(NGV),' SAE 912558, 1991
5 'Development of Conversion Technology of Small Van to High Efficiency CNG Sole Vehicle,' KIER-991404, 1999
6 M. Ishii, 'Analysis of Emissions Reduction Potential and Power output of Natural gas Engine,' Japanese Automotive Technology, Vol.47, pp.60-65, 1993
7 H. J. Han, 'Study of Diffusion Activation Plan for Low Emission Fuel Vehicle,' KEI, 1996
8 Yuu, Torikai, Sato, Iwamoto, 'Selective Catalytic Reduction of NO by Hydrocarbons in Oxidizing Atmosphere,' Catalyst (in Japan), Vol.33, No.2, 1991
9 G. E. Hundleby, 'Low Emissions Approaches for Heavy-Duty Gas-Powered Urban Vehicles,' SAE 892134, 1989
10 A. Unich, Istotuto, D. W. Lyons, 'Natural Gas: A Promising Fuel for LC. Engine,' SAE 930929, 1993