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The Impact of a Combustion Chamber Optimization on the Mixture Formation and Combustion in a CNG-DI Engine in Stratified Operation
Technical Paper
2017-01-0779
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
A previous study by the authors has shown an efficiency benefit of up to Δηi = 10 % for stratified operation of a high pressure natural gas direct injection (DI) spark ignition (SI) engine compared to the homogeneous stoichiometric operation with port fuel injection (PFI). While best efficiencies appeared at extremely lean operation at λ = 3.2, minimum HC emissions were found at λ = 2. The increasing HC emissions and narrow ignition time frames in the extremely lean stratified operation have given the need for a detailed analysis. To further investigate the mixture formation and flame propagation und these conditions, an optically accessible single-cylinder engine was used. The mixture formation and the flame luminosity have been investigated in two perpendicular planes inside the combustion chamber. By quantifying the equivalence ratio using the laser-induced fluorescence (LIF) technique a correlation between the presence of an ignitable mixture at the spark plug and the indicated start of combustion (SOC) was shown [1]. Through the investigation of the flame luminosity, the main reason for incomplete combustion and the according emissions was revealed. With this cause-and-effect comprehension, the combustion chamber has been modified to enforce an improved charge stratification. A geometric modification of the piston head ensures deflecting the ignitable mixture to the spark plug and prevents the injection from reaching the inner cylinder wall and crevices. Optical investigations were used to develop a design that improves mixture formation.
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Friedrich, W., Grzeszik, R., Lauschke, P., Zelenov, V. et al., "The Impact of a Combustion Chamber Optimization on the Mixture Formation and Combustion in a CNG-DI Engine in Stratified Operation," SAE Technical Paper 2017-01-0779, 2017, https://doi.org/10.4271/2017-01-0779.Data Sets - Support Documents
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References
- Friedrich , W. , Grzeszik , R. , and Wensing , M. Mixture Formation in a CNG-DI Engine in Stratified Operation SAE Technical Paper 2015-24-2474 2015 10.4271/2015-24-2474
- Energy Technology Perspectives 2016 - Towards Sustainable Urban Energy Systems International Energy Agency 2016
- Thipse , S. , Sonawane , S. , D'Souza , A. , Rairikar , S. et al. Injection Strategies, Optimization and Simulation Techniques on DI CNG Technology SAE Technical Paper 2015-26-0046 2015 10.4271/2015-26-0046
- Friedrich , W. , Grzeszik , R. , and Wensing , M. Optische Diag-nostik für die Analyse des Schichtbetriebs bei der Gasdirektein-blasung FKFS Tagung Gasfahrzeuge 2015 - Alternative mit Zukunft
- Ratzke , A. Modellierung der Flammenausbreitung und des Flammenlöschens im Gasmotor 2013
- Salazar , V. and Kaiser , S. An Optical Study of Mixture Preparation in a Hydrogen-fueled Engine with Direct Injection Using Different Nozzle Designs SAE Int. J. Engines 2 2 119 131 2010 10.4271/2009-01-2682
- 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
- Schulz , F. , Schmidt , J. , Kufferath , A. , and Samenfink , W. Gasoline Wall Films and Spray/Wall Interaction Analyzed by Infrared Thermography SAE Int. J. Engines 7 3 1165 1177 2014 10.4271/2014-01-1446
- Settles , G. S. Schlieren and Shadowgraph Techniques, Visualizing Phenomena in Transparent Media Springer 2001
- Johansen , L. , de Benito Sienes , E. , and Dahlander , P. Analysis of Transient Compressible Gas Jets Using High Speed Schlieren Imaging SAE Technical Paper 2013-01-0871 2013 10.4271/2013-01-0871
- Hajialimohammadi , A. , Honnery , D. , Abdullah , A. , Mirsalim , M.A. Time resolved characteristics of gaseous jet injected by a group-hole nozzle Fuel 113 November 2013 497 505 0016-2361 10.1016/j.fuel.2013.05.050
- Eckbreth , A. C. Laser Diagnostics for Combustion Temperature and Species Abacus Press 1988
- Schulz , C. , and 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. , and 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
- Blotevogel , T. , Egermann , J. , Goldlücke , J. , Leipertz , A. et al. Developing Planar Laser-Induced Fluorescence for the Investigation of the Mixture Formation Process in Hydrogen Engines SAE Technical Paper 2004-01-1408 2004 10.4271/2004-01-1408
- Mederer , T. , Wensing , M. , and Leipertz , A. Laser-Induced Fluorescence to Visualize Gas Mixture Formation in an Optically Accessible Hydrogen Engine COMODIA 2012 Fukuoka
- Rist , D. Dynamik realer Gase Springer 1996
- Faghani , E. , and Rogak , S.N. Application of CFD and Phenomenological Models in Studying Interaction of Two Turbulent Plane Jets IJMEM 1 2 2012 10.11159/ijmem.2012.005
- Weber , D. , and Leick , P. Structure and Velocity Field of Individual Plumes of Flashing Gasoline Direct Injection Sprays ILASS 2014 Bremen
- Lacey , J. , Poursadegh , F. , Brear , M. , Petersen , P. et al. Optical Characterization of Propane at Representative Spark Ignition, Gasoline Direct Injection Conditions SAE Technical Paper 2016-01-0842 2016 10.4271/2016-01-0842
- Flierl , R. et al. Simultaneous Combustion - Methane-Fuel and Methane-Diesel Mixture Preparations MTZ worldwide October 2011 72 10 78 84