This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Simulation Study of a Turbocharged Two-Stroke Single Cylinder 425cc SI Engine
Technical Paper
2021-24-0003
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
An afterburner-assisted turbocharged single-cylinder 425 cc two-stroke SI-engine is described in this simulation study. This engine is intended as a Backup Range Extender (REX) application for heavy-duty battery electric vehicles (BEV) when external electric charging is unavailable. The 425 cc engine is an upscaled version of a 125 cc port-injected engine [26] which demonstrated that the selected technology could provide a specific power level of 400 kW/L and the desired 150 kW in a heavy duty BEV application. The 425 cc single cylinder two-stroke engine is an existing engine as one half of a 850 cc snowmobile engine. This simulation study includes upscaling of the swept volume, impact on engine speed and gas exchange properties. In the same way as for the 125cc engine [26], the exhaust gases reaches the turbine through a tuned exhaust pipe and an afterburner or oxidation catalyst. The intent with the afterburner is to convert some of the air and hydrocarbons (HC) to heat to provide turbine power at a lower turbine pressure ratio. The turbocharger of the upscaled 425 cc engine was also linked to an electrical machine which was able to either absorb or extract power from the turbocharger shaft. This technique is sometimes referred to as super compounding. Downstream the turbine another oxidation catalyst was installed and utilized as a HC clean up catalyst.
It is demonstrated that the upscaled engine obtains optimum gas exchange conditions at a lower engine speed because of the port area relationship to the swept volume. The crank case compression ratio (CCR) increases due to the upscaling which has an impact on the optimum pressure difference between the air and exhaust side to optimize the gas exchange process. The upscaled engine also operates at higher air mass rates which allows the use of larger turbocharger compressors and turbines able to operate with higher efficiencies. Higher turbocharger efficiencies also contribute to lower pressure ratios on the turbine side for any given compressor pressure ratio which improves scavenging properties. The clean-up catalyst makes it possible to oxidate all the remaining HC in the exhaust gases in certain engine speed ranges.
Authors
Topic
Citation
Zander, L., "Simulation Study of a Turbocharged Two-Stroke Single Cylinder 425cc SI Engine," SAE Technical Paper 2021-24-0003, 2021, https://doi.org/10.4271/2021-24-0003.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 |
Also In
References
- Bassett , M. , Thatcher , I. , Bisordi , A. , Hall , J. et al. Design of a Dedicated Range Extender Engine SAE Technical Paper 2011-01-0862 2011 https://doi.org/10.4271/2011-01-0862
- Bassett , M. , Hall , J. , OudeNijeweme , D. , Darkes , D. et al. The Development of a Dedicated Range Extender Engine SAE Technical Paper 2012-01-1002 2012 https://doi.org/10.4271/2012-01-1002
- Bassett , M. , Hall , J. , Kennedy , G. , Cains , T. et al. The Development of a Range Extender Electric Vehicle Demonstrator SAE Technical Paper 2013-01-1469 2013 https://doi.org/10.4271/2013-01-1469
- Rust , A. and Graf , B. NVH of Electric Vehicles with Range Extender SAE Int. J. Passeng. Cars - Mech. Syst. 3 1 2010 860 867 https://doi.org/10.4271/2010-01-1404
- Atzwanger , M. , Hubmann , C. , Schoeffmann , W. , Kometter , B. et al. Two-Cylinder Gasoline Engine Concept for Highly Integrated Range Extender and Hybrid Powertrain Applications SAE Technical Paper 2010-32-0130 2010 https://doi.org/10.4271/2010-32-0130
- Christian , H. Single Cylinder 25kW Range Extender as Alternative to a Rotary Engine Maintaining High Compactness and NVH Performance SAE Technical Paper 2013-32-9132 2013 https://doi.org/10.4271/2013-32-9132
- Christian , H. and Stefan , G.
- Ebner , A. , Winkler , F. , Abart , M. , Luz , R. et al. Study of Possible Range Extender Concepts with Respect to Future Emission Limits SAE Technical Paper 2010-32-0129 2010 https://doi.org/10.4271/2010-32-0129
- Pischinger , M. , Tomazic , D. , Wittek , K. , Esch , H. et al. A Low NVH Range-Extender Application with a Small V-2 Engine - Based on a New Vibration Compensation System SAE Technical Paper 2012-32-0081 2012 https://doi.org/10.4271/2012-32-0081
- Blair , G.P. Design and Simulation of Two-Stroke Engines 1-56091-685-0 1996
- Hopkinson , B. The Charging of Two-Cycle Internal Combustion Engines Trans NE Coast Institution of Engineers. Shipbuilders 30 1914 433
- Watson , N. and Janota , M.S. Turbocharging the Internal Combustion Engine Imperial College London UK 1982 1-349-04024-7
- Benson , R.S. and Brandham , P.J. A Method for Obtaining a Quantitative Assessment of the Influence of Charge Efficiency on Two-Stroke Engine Performance Int. J. Mech. Sci. 11 1969 303
- Jante , A. Scavenging and Other Problems of Two-Stroke Cycle Spark-Ignition Engines SAE Technical Paper 680468 1968 https://doi.org/10.4271/680468
- Earnshaw , S. On the Mathematical Theory of Sound Phil. Trans. Roy. Soc. 150 1860 133
- Mattarelli , E. , Rinaldini , C. , Cantore , G. , and Agostinelli , E. Comparison between 2 and 4-Stroke Engines for a 30 kW Range Extender SAE Int. J. Alt. Power. 4 1 2015 67 87 https://doi.org/10.4271/2014-32-0114
- Duret , P. Potential of a production DI-Two Stroke Engine Adapted for Range Extender and Motorcycle Applications SAE Technical Paper 2017-32-0082 https://doi.org/10.4271/2017-32-0082
- Nucio , P. Development Through Simulation of a Turbocharged 2-Stroke GDI-Engine Focused on Range Extender Application SAE Technical Paper 2017-32-0121 2017 https://doi.org/10.4271/2017-32-0121
- Bradbury , N. , Den Braven , K. , Findlay , A. , and Johnson , J. Turbocharging a Crank-Case Scavenged and Direct-Injected Two-Stroke Engine for Snowmobile Applications SAE Technical Paper 2006-32-0052 2006 https://doi.org/10.4271/2006-32-0052
- Anton , N. 2019
- Zander , L. Internal Combustion Engine Gas Exchange & Boosting 2006 ISBN 978-91-7223-232-7
- Chen , S.K. , and Flynn , R.F. Development of Single Cylinder Compression Ignited Research Engine Conference: National Powerplant and Transportation Meetings 1965 10.4271/650733
- 2012
- Zander , L. and Dahlander , P.
- 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 https://doi.org/10.4271/2015-26-0038
- Buchman , M. , Ramanujan , D. , and Winter , A. A Method for Turbocharging Single-Cylinder, Four-Stroke Engines SAE Int. J. Engines 11 4 2018 423 434 https://doi.org/10.4271/03-11-04-0028