This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development and Experimental Investigation of a Two-Stroke Opposed-Piston Free-Piston Engine
Technical Paper
2016-32-0046
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The proposed paper deals with the development process and initial measurement results of an opposed-piston combustion engine for application in a Free-Piston Linear Generator (FPLG). The FPLG, which is being developed at the German Aerospace Center (DLR), is an innovative internal combustion engine for a fuel based electrical power supply. With its arrangement, the pistons freely oscillate between the compression chamber of the combustion unit and a gas spring with no mechanical coupling like a crank shaft. Linear alternators convert the kinetic energy of the moving pistons into electric energy. The virtual development of the novel combustion system is divided into two stages: On the one hand, the combustion system including e.g. a cylinder liner, pistons, cooling and lubrication concepts has to be developed. On the other hand, 3D-CFD-simulations are used in the early stage within the virtual development process toward the optimization of the geometry of the scavenging ports and ducts, the gas exchange, injection and ignition. With the high variability of the free piston concept, a strategy for a dual combustion mode operation with spark ignition and homogeneous charge compression ignition (HCCI) is developed. The new engine is constructed on and implemented at a hydraulic free-piston test bench at DLR which controls the piston movements by two hydraulic actuators. In this stage, the power is not converted by linear generators yet. First measurement results show the engine behavior with dual spark ignition and two opposed injectors.
Recommended Content
Authors
Topic
Citation
Schneider, S., Chiodi, M., Friedrich, H., and Bargende, M., "Development and Experimental Investigation of a Two-Stroke Opposed-Piston Free-Piston Engine," SAE Technical Paper 2016-32-0046, 2016, https://doi.org/10.4271/2016-32-0046.Also In
References
- Chiodi , M. An innovative 3D-CFD-approach towards virtual development of internal combustion engines PhD thesis Vieweg+ Teubner Verlag 2011 978-3-8348-1540-8
- Franke , M. , Huang , H. , Liu , J. , Geistert , A. et al. Opposed Piston Opposed Cylinder (opoc™) 450 hp Engine: Performance Development by CAE Simulations and Testing SAE Technical Paper 2006-01-0277 2006 10.4271/2006-01-0277
- Gersdorff , K. , Grasmann , K. and Schubert , H. Flugmotoren und Strahltriebwerke Bonn Bernard & Graefe Verlag 1995 91 3-7637-6107-1
- Haag , J. , Kock , F. , Chiodi , M. , Mack , O. et al. Development Approach for the Investigation of Homogeneous Charge Compression Ignition in a Free-Piston Engine SAE Technical Paper 2013-24-0047 2013 10.4271/2013-24-0047
- Herold , R. , Wahl , M. , Regner , G. , Lemke , J. et al. Thermodynamic Benefits of Opposed-Piston Two-Stroke Engines SAE Technical Paper 2011-01-2216 2011 10.4271/2011-01-2216
- Heywood , J. Internal combustion engine fundamentals 930 New York Mcgraw-hill 1988 0-07-100499-8
- Hibi , A. , and Ito T. Fundamental test results of a hydraulic free piston internal combustion engine Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 218.10 2004 1149 1157
- Huang , L. An Opposed-Piston Free-Piston Linear Generator Development for HEV SAE Technical Paper 2012-01-1021 2012 10.4271/2012-01-1021
- Huo , M. , Huang , Y. , and Hofbauer , P. Piston Design Impact on the Scavenging and Combustion in an Opposed-Piston, Opposed-Cylinder (OPOC) Two-Stroke Engine SAE Technical Paper 2015-01-1269 2015 10.4271/2015-01-1269
- Johnsan , D. , Koszewnik , J. , Fromm , L. , Redon , F. et al. Opposed-Piston, Two-Stroke Diesel Engine Advantages in Meeting Higher Fuel Efficiency and Emissions Standards 3rd Aachen Colloquium China Automobile and Engine Technology 2013
- Koch , D. , Wachtmeister , G. , Entsch , M. , Chiodi , M. et al. Investigation of the mixture formation process with combined injection strategies in high-performance SI-engines 16th Internationales Stuttgarter Symposium Springer Fachmedien Wiesbaden 2016
- Kock , F. , Heron , A. , Rinderknecht , F. and Friedrich , H. The Free-Piston Linear Generator - Potentials and Challenges MTZ worldwide 74.10 2013 38 43
- Kock , F. Steuerung und Regelung des Freikolbenlineargenerators - Entwicklungsmethode für den Betrieb eines neuartigen Energiewandlers German PhD thesis University of Stuttgart 2015
- Li , K. , Sadighi A. , and Sun Z. Motion control of a hydraulic free-piston engine American Control Conference (ACC) 2012 IEEE 2012
- Mikalsen , R. , and Roskilly , A. P. A review of free-piston engine history and applications Applied Thermal Engineering 27.14 2007 2339 2352
- Naik , S. , Redon , F. , Regner , G. , and Koszewnik , J. Opposed-Piston 2-Stroke Multi-Cylinder Engine Dynamometer Demonstration SAE Technical Paper 2015-26-0038 2015 10.4271/2015-26-0038
- Redon , F. , Sharma , A. , and Headley , J. Multi-Cylinder Opposed Piston Transient and Exhaust Temperature Management Test Results SAE Technical Paper 2015-01-1251 2015 10.4271/2015-01-1251
- Regner , G. , Johnson , D. , Koszewnik , J. , Dion , E. et al. Modernizing the Opposed Piston, Two Stroke Engine for Clean, Efficient Transportation SAE Technical Paper 2013-26-0114 2013 10.4271/2013-26-0114
- Regner , G. , Koszewnik , J. , Rdeon , F. Dion , E. Modernizing the Opposed-Piston, Two-Stroke Diesel Engine for more Efficient Commercial Vehicle Apllications Achates Power, Inc. 2012
- Rinderknecht , F. and Herzog , H. Calculation of a Linear Generator for a Hybrid Vehicle Concept XIX International Conference on Electrical Machines - ICEM Italy 2010
- Schneider , S. and Friedrich , H. Experimental Investigation and Analysis of Homogeneous Charge Compression Ignition in a Two-Stroke Free-Piston Engine SAE Int. J. Engines 9 1 365 373 2016
- Schneider , S. , Rinderknecht , F. and Friedrich , H. Design of Future Concepts and Variants of the Free Piston Linear Generator EVER 2014 Monaco 2014
- Seboldt , D. , Lejsek , D. , Wentsch , M. , Chiodi , M. et al. Numerical and Experimental Studies on Mixture Formation with an Outward-Opening Nozzle in a SI Engine with CNG-DI SAE Technical Paper 2016-01-0801 2016 10.4271/2016-01-0801
- Van Blarigan , P. , Paradiso , N. , and Goldsborough , S. Homogeneous Charge Compression Ignition with a Free Piston: A New Approach to Ideal Otto Cycle Performance SAE Technical Paper 982484 1998 10.4271/982484
- Wentsch , M. , Chiodi , M. , Bargende , M. , Pötsch , C. et al. Virtual Engine Development as a Success Factor in the F.I.A. World Rally Championship (WRC) 12th International Symposium on Combustion Diagnostics Baden-Baden - Germany 2016
- Wentsch , M. , Chiodi , M. , Bargende , M. , Seboldt , D. et al. 3DCFD analysis on scavenging and mixture formation for CNG direct injection with an outward-opening nozzle 16. Internationales Stuttgarter Symposium Springer Fachmedien Wiesbaden 2016
- Zhao. H. HCCI and CAI engines for the automotive industry Elsevier 2007