This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effects of natural gas composition on bus engine performance
Annotation ability available
Sector:
Language:
English
Abstract
Aiming at evaluating the effects of natural gas composition on engine operation, the Engine Group of IPT has completed a series of dynamometer tests in a Mercedes Benz M366G gas engine.
Twenty-five gaseous fuel compositions, several specially prepared to extend the available CNG compositions, were engine tested.
The tests were executed to evaluate performance, exhaust emissions and knock-limited spark timing. The experimental results were correlated with methane and Wobbe numbers calculated from the gas composition. The obtained data corroborate the relevance of these parameters to engine operation.
For the tested engine, that uses an open loop fuel system, the data indicate the need to maintain the natural gas specifications in narrow limits if one wants to explore the natural gas low pollutant potential.
This study has subsidized the elaboration of a Brazilian vehicular natural gas specification.
Recommended Content
Technical Paper | ADVANCED CATALYSTS FOR CNG-ENGINES |
Technical Paper | Knock Rating of Gaseous Fuels in the Presence of Diluents |
Technical Paper | Development of Bi-fuel CNG Engine based passenger vehicle and Field Trials study in Indian condition |
Authors
- Francisco E. B. Nigro - IPT - Instituto de Pesquisas Tecnologicas
- Mauricio A. Trielli - IPT - Instituto de Pesquisas Tecnologicas
- Clayton B. Zabeu - IPT - Instituto de Pesquisas Tecnologicas
- Lydia L. C. Silva - IPT - Instituto de Pesquisas Tecnologicas
- Silvio A. Figueiredo - IPT - Instituto de Pesquisas Tecnologicas
Citation
Nigro, F., Trielli, M., Zabeu, C., Silva, L. et al., "Effects of natural gas composition on bus engine performance," SAE Technical Paper 973038, 1997, https://doi.org/10.4271/973038.Also In
References
- Hochhauser. A.M. et al. Comparison of CNG and gasoline vehicle exhaust emissions: mass and composition - the auto/oil air quality Improvement research program. SAE paper 952507
- Klimstra, J. Interchangeability of gaseous fuels - the importance of the Wobbe-index. SAE paper 861578
- Liss. W.E. & Thrasher, W.H. Natural gas as stationary engine and vehicular fuel. SAE paper 912364
- King, S.R. The impact of natural gas composition on fuel metering and engine operational characteristics. SAE paper 920593.
- Matthews et al. CNG Composition in Texas and the effects of composition on emissions, fuel economy and driveability of NGVs. SAE paper 962097
- Heywood, J. B. Internal Combustion Engine Fundamentals. McGraw-Hill. 1988 Chap 15 3.3.
- Silva, L.L.C. & Zulauf, M.R. Variability of natural gas composition in Brazil. SAE paper to be present in Fuels & Lubricants Meeting. October 1997
- Maddox, R.N. Phase behaviour of mixtures In Heat exchanger design handbook-Physical properties. Dusseldorf: VDI - Verlag GmbH. 1083 V 5 Chap 5.2.1 pp.5.2.1-5.2.6.
- Wilby, R.V. Gas quality specificattons for compressed natural gas (CNG) vehicle fuel in Gas Quality. Amsterdam, Elsevier Science Publisher 1986 pp.37-46.
- ABNT. Determinação da emissao do gas de escapamento emitido por motor Diesel - NBR10813.
- Kubesh, J. et al. Effect of gas composition on octane number of natural gas fuels. SAE paper 922359
- Leiker, M. et al. Evaluation of antiknocking property of gaseous fuels by means of methane number and its practical application to gas engines ASME 72-DGP-4, 1972