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Optimised Neat Ethanol Engine with Stratified Combustion at Part-load; Particle Emissions, Efficiency and Performance
Technical Paper
2013-01-0254
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A regular flex-fuel engine can operate on any blend of fuel between pure gasoline and E85. Flex-fuel engines have relatively low efficiency on E85 because the hardware is optimized for gasoline. If instead the engine is optimized for neat ethanol, the efficiency may be much higher, as demonstrated in this paper.
The studied two-liter engine was modified with a much higher compression ratio than suitable for gasoline, two-stage turbocharging and direct injection with piezo-actuated outwards-opening injectors, a stratified combustion system and custom in-house control system. The research engine exhibited a wide-open throttle performance similar to that of a naturally aspirated v8, while offering a part-load efficiency comparable to a state-of-the-art two-liter naturally aspirated engine. NOx will be handled by a lean NOx trap.
Combustion characteristics were compared between gasoline and neat ethanol. Particles numbers were about 15% from ethanol in comparison to those from gasoline at 2000 rpm, 2 bar BMEP and fuel consumption ~300 g/kWh (with numbers for ethanol converted to gasoline's heating value). The highest load was limited to 12 bar for gasoline due to knocking, but ethanol could be run at optimum ignition and with λ=1, up to at least 16 bar BMEP, where fuel consumption was 215 g/kW h, corresponding to 37% efficiency.
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Citation
Warnberg, J., Boehmer, M., and Denbratt, I., "Optimised Neat Ethanol Engine with Stratified Combustion at Part-load; Particle Emissions, Efficiency and Performance," SAE Technical Paper 2013-01-0254, 2013, https://doi.org/10.4271/2013-01-0254.Also In
References
- Monbiot , George We were wrong on peak on peak oil. There's enough to fry us all The Guardian 2012
- Economist, The The only way is down The Economist July 10 2008
- Badal , Lionel Seeking Alpha Peak Oil For Dummies http://seekingalpha.com/article/154901-peak-oil-fordummies Oct. 2012
- Petit , J R et al. Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica Nature 3 June 1999 429 436
- Richter , Burton “Beyond smoke and mirrors.” Cambridge University press 978-0-521-76384-4 2010
- NHTSA Obama Administration Finalizes Historic 54.5 mpg Fuel Efficiency Standards http://www.nhtsa.gov/About+NHTSA/Press+Releases/2012/Obama+Administration+Finalizes+Historic+54.5+mpg+Fuel+Efficienc+Standards Oct. 2012
- European Congress Road transport: Reducing CO2 emissions from passenger cars http://ec.europa.eu/clima/policies/transport/vehicles/cars/index_en.htm Oct. 2012
- DieselNet Emission standards; European Union;Cars and Light trucks http://www.dieselnet.com/standards/eu/ld.php Oct. 2012
- Time Business: Detroit's total revolution Time Magazine 1979
- Kreuter , P. , Peter U. , Kier M. , Wegner S. , Müller M. , and Bey R. Meta Downsizing Konzept: Reduzierung der CO2-Emissionen bis auf 75g/km Vienna: International Vienna Motor Symposium 2009
- Lumsden , G. , OudeNijeweme , D. , Fraser , N. , and Blaxill , H. Development of a Turbocharged Direct Injection Downsizing Demonstrator Engine SAE Int. J. Engines 2 1 1420 1432 2009 10.4271/2009-01-1503
- Golloch , R , and Merker G P Downsizing bei Verbrennungsmotoren- Grundlagen, Stand der Technik und zukünftige Konzepte MTZ Feb 2005 126 131
- Szengel , R et al. Der TSI-Motor mit 90kW-Erweiterung der verbrauchsgünstigen Ottomotoernbaureihe von Volkswagen MTZ July Aug 2007 538 545
- Bergström , Kjell ac , Nordin Henrik , Königstein Achim , Marriot Craig D , and Wiles Matthew A ABC-Brennverfahren für Alkoholkraftstoffe - Herausforderungen und Möglichkeiten Aachen: Aachener Kolloquium Fahrzeug- und Motorentechnik 2007 2007
- West , B. , López , A. , Theiss , T. , Graves , R. et al. Fuel Economy and Emissions of the Ethanol-Optimized Saab 9-5 Biopower SAE Technical Paper 2007-01-3994 2007 10.4271/2007-01-3994
- Drangel , H. , Olofsson , E. , and Reinmann , R. The Variable Compression (SVC) and the Combustion Control (SCC) - Two Ways to Improve Fuel Economy and Still Comply with World-Wide Emission Requirements SAE Technical Paper 2002-01-0996 2002 10.4271/2002-01-0996
- Schwaderlapp , M. , Habermann , K. , and Yapici , K. Variable Compression Ratio - A Design Solution for Fuel Economy Concepts SAE Technical Paper 2002-01-1103 2002 10.4271/2002-01-1103
- Heywood , J. B. “Internal Combustion Engine Fundamentals.” Singapore McGraw-Hill 0-07-100499-8 1988
- Schwarz , C. , Missy , S. , Steyer , H. , Durst , B. , Schünemann , E. , Kern , W. , Witt , A. Die neuen Vier- und Sechszylinder-Ottomotoren von BMW mit Schichtbrennverfahren MTZ May 2007 332 341
- Waltner , A. , Lückert P. , Schaupp U. , Rau E. , Kemmler R. , and Weller R. Die Zukunftstechnologie des Ottomotors: Strahlgefürhrte Direkteinspritzung mit Piezo-Injektor Vienna: International Vienna Motor Symposium 2006
- Achleitner , E. , Bäcker , H. , and Funaioli , A. Direct Injection Systems for Otto Engines SAE Technical Paper 2007-01-1416 2007 10.4271/2007-01-1416
- Rodrigues , A. and Alto , A. Cold Start System Development for Flex Fuel Vehicles SAE Technical Paper 2007-01-2595 2007 10.4271/2007-01-2595
- Siewert , R. and Groff , E. Unassisted Cold Starts to −29°C and Steady-State Tests of a Direct-Injection Stratified-Charge (DISC) Engine Operated on Heat Alcohols SAE Technical Paper 872066 1987 10.4271/872066
- Wärnberg , Jonas , Andersson Mats , Dahlander Petter , and Denbratt Ingemar Optimierung des geschichteten Kaltstarts eines fremdgezündeten Ethanolmotors mit piezoaktuirter Direkteinspritzung München: Motorische Verbrennung 2011
- Rosillo-Calle , F. , and Cortez L. A. B. Towards Proalcool II- A Review of the Brazilian Bioethanol Programme Biomass and Bioenergy Feb 1998 115 124
- Kabasin , D. , Hoyer , K. , Kazour , J. , Lamers , R. et al. Heated Injectors for Ethanol Cold Starts SAE Int. J. Fuels Lubr. 2 1 172 179 2009 10.4271/2009-01-0615
- Climatemps.com http://www.brazil.climatemps.com/ Oct. 2012
- Schmuck-Soldan , Simon , Koenigstein Achim , och Westin Fredrik Two-Stage Boosting of Spark Ignition Engines Wienna: 32 Internationales Wiener Motorensymposium 2011
- Ekstöm , Fredrik Saab Autmobile Powertrain AB Nov. 2010
- Fansler , Todd D , och Drake Michael C “Designer diagnostics” for developing direct-injection gasoline engines Second International Conference on Optical and Laser Diagnostics 2005
- Chin , M. , Smith , J. , and Sick , V. Cycle-Resolved NO Measurements in a Spray-Guided SIDI Engine using Fast Exhaust Measurements and High-Speed OH* Chemiluminescence Imaging SAE Int. J. Fuels Lubr. 1 1 570 577 2009 10.4271/2008-01-1072
- Owen , K. , and Coley , T. “Automotive Fuels Reference Book,” Society of Automotive Engineers Warrendale, PA 978-1-56091-589-8 1995 10.4271/R-151
- Vibe , I, I “Brennverlauf und kreisprozess von Verbrennungsmotoren.” Berlin VEB Verlag Technik 1970
- Ghojel , J, I “Review of the development and applications of the Wiebe function: a tribute to the contribution of Ivan Wiebe to engine research.” Monash University 2010
- Bromberg , L. “Benchmarking of Alcohol Chemical Kinetic Mechanism for Laminar Flame Speed Calculations.” MIT Plasma Science and Fusion Center 2008
- Livengood , J C , och Wu P C Correlation of Autoignition Phenomena in Internal Combustion Engines and Rapid Compression Machines Fifth (International) Symposium on Combustion 1955
- Douaud , A. and Eyzat , P. Four-Octane-Number Method for Predicting the Anti-Knock Behavior of Fuels and Engines SAE Technical Paper 780080 1978 10.4271/780080
- Wärnberg , Jonas “Direct vs. port injection of gasoline on a 2.2 litre 4-cylinder, homogenous charge SI engine.” Göteborg Chalmers University of Technology 2003
- “Particle Measurement Programme (PMP) Light-duty Inter-laboratory Correlation Exercise (ILCD_LD) Final Report.” European Commision-Joint Research Centre-Institute for Environment and Sustainability 2007
- Hemdal , S. , Denbratt , I. , Dahlander , P. , and Warnberg , J. Stratified Cold Start Sprays of Gasoline-Ethanol Blends SAE Int. J. Fuels Lubr. 2 1 683 696 2009 10.4271/2009-01-1496
- Buri , S. , Busch , S. , Kubach , H. , and Spicher , U. High Injection Pressures at the Upper Load Limit of Stratified Operation in a DISI Engine SAE Int. J. Engines 2 2 40 47 2010 10.4271/2009-01-2657
- Nauwerck , A. , Pfeil , J. , Velji , A. , Spicher , U. et al. A Basic Experimental Study of Gasoline Direct Injection at Significantly High Injection Pressures SAE Technical Paper 2005-01-0098 2005 10.4271/2005-01-0098
- Wärnberg , Jonas , Hemdal Stina , Andersson Mats , Dahlander Petter , and Denbratt Ingemar Zündfähigkeit eines Hohlkegel Benzin/Äthanol Sprays Aachen: Aachener Kolloquium Fahrzeug-und Motorentechnik 2009 2009
- Böhmer , Marius “Gas exchange simulation of a two-stage turbocharged 2.0 l 4-cylinder direct injection spark ignition engine using ethanol fuel.” Aachen RWTH Aachen 2011