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Free Piston Combustion Engine Design Analysis and Challenges
Technical Paper
2015-32-0768
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
There has been a recent resurgence in interest in “free piston” engine designs, particularly for small engine applications. This has been driven primarily by the demand for higher efficiency, flex-fuel capability, and also electrical demand in hybrid-electric applications. In free piston engines, expansion gasses are used to send energy directly to electrical or hydraulic power systems, rather than through a crankshaft. In many instances, the designs use opposed pistons to contribute the momentum of one piston to the upwards stroke of the opposing piston. This paper will review the details and benefits of the early free piston designs and some current designs, including our own hydraulic hybrid engine designs. The paper will then turn to a future free piston engine application that is in development.
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Citation
Washko, F. and Winchell, R., "Free Piston Combustion Engine Design Analysis and Challenges," SAE Technical Paper 2015-32-0768, 2015, https://doi.org/10.4271/2015-32-0768.Also In
References
- Mikalsen , R. , Roskilly , A.P. A review of free-piston engine history and applications Applied Thermal Engineering 27 2339 2352 2007
- Underwood , A.F. The GMR 4-4 “HYPREX” Engine A Concept of the Free-Piston Engine for Automotive Use SAE Transactions 65 377 391 1957
- Frey , D.N. , Klotsh , P. , Egli , A. The Free-Piston-Turbine Engine SAE Transactions 65 628 634 1957
- Noren , O.B. , Erwin , R.L. The Future of the Free-Piston Engine in Commercial Vehicles SAE Transactions 66 305 314 1958
- DLR German Aerospace Center DLR researchers unveil a new kind of range extender for electric cars DLR German Aerospace Center 2 19 2013 3 28 2015 http://www.dlr.de/dlr/en/desktopdefault.aspx/tabid-10081/151_read-6318/year-all/151_page-2/
- Free Piston Linear Generator “FPEG” Toyota Central R&D Labs., Inc. 1 1 2014 3 28 2015 http://www.tytlabs.com/tech/fpeg/
- Kosaka , H. , Akita , T. , Moriya , K. , Goto , S. et al. Development of Free Piston Engine Linear Generator System Part 1 - Investigation of Fundamental Characteristics SAE Technical Paper 2014-01-1203 2014 10.4271/2014-01-1203
- Goto , S. , Moriya , K. , Kosaka , H. , Akita , T. et al. Development of Free Piston Engine Linear Generator System Part 2 - Investigation of Control System for Generator SAE Technical Paper 2014-01-1193 2014 10.4271/2014-01-1193
- Berlinger , Willibald G. , and Raab Francis J. Free Piston Engine with Electrical Power Output Caterpillar Inc Patent US6541875 B1 1 Apr. 2003
- Max Erland , Lundgren Staffan , Somhurst Joop , Hoglund Anders , Wirmark Goran , Gertmar Lars , and Denbratt Ingemar Energy Converter Volvo Car Corporation Patent US7845317 B2 7 Dec. 2010
- Hofbauer , Peter Internal Combustion Engine Advanced Propulsion Technologies, Inc. Patent US7383796 B2 10 June 2008
- Peng , Lixin , Hofbauer Peter , and Yang Jialin Fuel Injection for a Free Piston Engine Ford Global Technologies, Llc Patent US6959672 B1 1 Nov. 2005
- Moiroux , A. F. Free-piston engine possibilities ASME Oil and Gas Power Conference 58-OGP-7 1958