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Mixture Formation in a CNG-DI Engine in Stratified Operation
Technical Paper
2015-24-2474
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In a study using a single-cylinder engine a significant potential in fuel efficiency and emission reduction was found for stratified operation of a high pressure natural gas direct injection (DI) spark ignition (SI) engine. The control of the mixture formation process appeared to be critical to ensure stable inflammation of the mixture. Therefore, optical investigations of the mixture formation were performed on a geometric equivalent, optically accessible single-cylinder engine to investigate the correlation of mixture formation and inflammability.
The two optical measurement techniques infrared (IR) absorption and laser-induced fluorescence (LIF) were employed. Mid-wavelength IR absorption appeared to be qualified for a global visualization of natural gas injection; LIF allows to quantify the equivalence ratio inside a detection level. While LIF measurements require complex equipment, the IR setup consists merely of a black body heater and a mid-wavelength sensitive IR camera. Methane, the main part of natural gas, absorbs IR radiation at about 3.4 μm. The LIF technique was used to get detailed information about the charge distribution in the region of the spark plug, complementary to the global view acquired by the IR technique.
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Friedrich, W., Grzeszik, R., and Wensing, M., "Mixture Formation in a CNG-DI Engine in Stratified Operation," SAE Technical Paper 2015-24-2474, 2015, https://doi.org/10.4271/2015-24-2474.Also In
References
- Pischinger , R. , Klell , M. , Sams , T. Thermodynamik der Verbrennungskraftmaschine - Dritte Auflage - Der Fahrzeugantrieb Springer-Verlag/Wien 2009
- Leipertz , A. Engineering Thermodynamics 3 rd Esytec Energie- und Systemtechnik GmbH Erlangen 2006
- Yu , Z. , Fang-rong , W. , Yan-hui , Z. , Yi-ding , W. , Tian , C. , Ru-wen , K. , Li-chun , W. , Tie-qiang , Z. , Yuan-kun , Z. Experiment research on ellipsoidal structure methane using the absorption characteristics of 3.31 μm mid-infrared spectroscopy Infrared Physics & Technology 55 4 July 2012 353 356
- Rothman , L.S. , Gordon , I.E. , Babikov , Y. , Barbe , A. et al. The HITRAN2012 molecular spectroscopic database Journal of Quantitative Spectroscopy and Radiative Transfer 130 2013 4 50 10.1016/j.jqsrt.2013.07.002
- Eckbreth , A. C. Laser Diagnostics for Combustion Temperature and Species Abacus Press 1988
- Schulz , C. , Sick , V. Tracer-LIF diagnostics: quantitative measurement of fuel concentration, temperature and fuel/air ratio in practical combustion systems Progress in Energy and Combustion Science 31 1 75 121 2005 10.1016/j.pecs.2004.08.002
- Melton , L.A. , Lipp , C.W. Criteria for Quantitative PLIF Experiments Using High Power-Lasers Experiments in Fluids 2003 35 310 316
- Fröba , A. Fluoreszenzspektroskopische Untersuchungen an organischen Tracersubstanzen in heterogenen Systemen, Diplomarbeit Friedrich-Alexander-Universität Erlangen-Nürnberg 1996
- Mederer , T. , Wensing , M. , Leipertz , A. Laser-Induced Fluorescence to Visualize Gas Mixture Formation in an Optically Accessible Hydrogen Engine COMODIA 2012 Fukuoka
- Mohammad , T.I. , Harrison , M. , Jermy , M. , How , H.G. The structure of the high-pressure gas jet from a spark plug fuel injector for direct fuel injection J Vis 2010 13 121 131 10.1007/s12650-009-0017-2
- Bruneaux , G. , Causse , M. , and Omrane , A. Air Entrainment in Diesel-Like Gas Jet by Simultaneous Flow Velocity and Fuel Concentration Measurements, Comparison of Free and Wall Impinging Jet Configurations SAE Int. J. Engines 5 2 76 93 2012 10.4271/2011-01-1828
- Flierl , R. et al. Simultaneous Combustion - Methane-Fuel and Methane-Diesel Mixture Preparations MTZ worldwide October 2011 72 10 78 84