This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Experimental Investigations of Two-Stroke SI Combustion with Simultaneous Cycle-Based Fuel Consumption Measurements
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 28, 2010 by SAE International in United States
Annotation ability available
Unstable combustion and high cyclic variations of the in-cylinder pressure associated with low engine running smoothness and high emissions are mainly caused by cyclic variations of the fresh charge composition, the variability of the ignition and the fuel mass. These parameters affect the inflammation, the burn rate and thus the whole combustion process. In this paper, the effects of fluctuating fuel mass on the combustion behavior are shown. Small two-stroke engines require special measuring and testing equipment, especially for measuring the fuel consumption at very low fuel flow rates as well as very low fuel supply pressures. To realize a cycle-resolved measurement of the injected fuel mass, fuel consumption measurement with high resolution and high dynamic response is not enough for this application. It is also very important that this measurement technique can cope with fluctuating fuel flows and does not influence the combustion and hence the engine performance - due to the pressure drop over the flow meter. To analyze the effects, the cycle-resolved measurement of the fuel mass was simultaneously adapted with ion current measuring techniques on a small two-stroke SI engine and a correlation between cycle-based variations of the fuel mass and the combustion behavior was performed.
- Kai W. Beck - Karlsruhe Institute of Technology (KIT)
- Fatih Sarikoc - MOT GmbH
- Ulrich Spicher - Karlsruhe Institute of Technology (KIT)
- Hans Van den Hoevel - AVL Deutschland GmbH
- Martin Duerrwaechter - AVL Deutschland GmbH
- Heribert Kammerstetter - AVL LIST GmbH
- Tim Gegg - ANDREAS STIHL AG & Co. KG
- Armin Kölmel - ANDREAS STIHL AG & Co. KG
CitationBeck, K., Sarikoc, F., Spicher, U., Van den Hoevel, H. et al., "Experimental Investigations of Two-Stroke SI Combustion with Simultaneous Cycle-Based Fuel Consumption Measurements," SAE Technical Paper 2010-32-0061, 2010, https://doi.org/10.4271/2010-32-0061.
- Arndt, I S., Grzeszik, R., Raimann, J., Seibel, C.: “Laseroptische Analyse der Gemischbildung bei Benzindirekteinspritzung zur Optimierung der Einspritzstrategie für strahlgeführte Brennverfahren”, 4. Tagung Motorische Verbrennung - Aktuelle Probleme und moderne Lösungsansätze, Leipertz, A.(Hrsg.) ESYTEC GmbH, Erlangen 2003
- Zimmermann, D.: “Inflammation of Stratified Mixtures in Spray Guided DI Gasoline Engines: Optimization by Application of High Speed Imaging Techniques”, 6th International Symposium on Internal Combustion Diagnostic, Baden-Baden, Germany, 2004
- Gegg, T. and Beck, K.W., “Combustion Analysis on Small Two-Stroke SI-Engines for Handheld Power Tools,” SAE Technical Paper 2010-32-0062, 2010, doi:10.4271/2010-32-0062.
- Henzinger, Dr. Ronald, Kammerstetter, Dr. Heribert, Radke, Dr. Friedrich B., Werner, Manfred: “New Measurement Technology for Direct Injection Systems of Diesel and Gasoline Engines”, MTZ_67_2006_Vol_7-8
- Beck, K.W., Bernhardt, S., Spicher, U., Gegg, T. et al., “Ion Current Measurement in Small Two-Stroke SI Engines,” SAE Technical Paper 2008-32-0037, 2008, doi:10.4271/2008-32-0037.
- Gandhi, A., Meinhart, M., and Ortiz, S., “Summary of Flow Metering Options for Injector Characterization,” SAE Technical Paper 2009-01-0664, 2009, doi:10.4271/2009-01-0664.