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Combining Unthrottled Operation with Internal EGR under Port and Central Direct Fuel Injection Conditions in a Single Cylinder SI Engine
Technical Paper
2009-01-1835
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This experimental work was concerned with the combination of internal EGR with an early inlet valve closure strategy for improved part-load fuel economy. The experiments were performed in a new spark-ignited thermodynamic single cylinder research engine, equipped with a mechanical fully variable valvetrain on both the inlet and exhaust. During unthrottled operation at constant engine speed and load, increasing the mass of trapped residual allowed increased valve duration and lift to be used. In turn, this enabled further small improvements in gas exchange efficiency, thermal efficiency and hence indicated fuel consumption. Such effects were quantified under both port and homogeneous central direct fuel injection conditions. Shrouding of the inlet ports as a potential method to increase in-cylinder gas velocities has also been considered.
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Authors
Topic
Citation
Cairns, A., Todd, A., Hoffman, H., Aleiferis, P. et al., "Combining Unthrottled Operation with Internal EGR under Port and Central Direct Fuel Injection Conditions in a Single Cylinder SI Engine," SAE Technical Paper 2009-01-1835, 2009, https://doi.org/10.4271/2009-01-1835.Also In
References
- Louis, J.J.J. “Well-To-Wheel Energy Use and Greenhouse Gas Emissions for Various Vehicle Technologies” SAE Paper No. 2001-01-1343 2001
- Kramer, U Phlips, P. “Phasing Strategy for An Engine With Twin Variable Cam Timing” SAE Paper No. 2002-01-1101 2002
- Moro, D. Minelli, G. Serra, G. “Thermodynamic Analysis of Variable Valve Timing Influence on SI Engine Efficiency” SAE Paper No. 2001-01-0667 2001
- Roberts, C.E. Stanglmaier, R.H. “Investigation of Intake Timing Effects on the Cold Start Behaviour of a Spark Ignition Engine” SAE Paper No. 1999-01-3622 1999
- Cairns, A. Irlam, G. Blaxill, H. “Exhaust Gas Recirculation for Improved Part and Full Load Fuel Economy in a Turbocharged Gasoline Engine” SAE Paper No. 2006-01-0047 2006
- Schäfer, J. Balko, J. “High Performance Electric Camshaft Phasing System” SAE Paper No. 2007-01-1294 2007
- Tuttle, J. “Controlling engine load by means of Late Intake Valve Closing” SAE Paper No. 800794 1980
- Tuttle, J. “Controlling engine load by means of Early Intake Valve Closing” SAE Paper No. 820408 1982
- Cleary D. Silvas G. “Unthrottled Engine Operation with Variable Intake Valve Lift, Duration and Timing” SAE Paper No. 2007-01-1282 2007
- Hannibal, W. Flierl, R. Stiegler, L. Meyer, R. “Overview of Current Continuously Variable Valve Lift Systems for Four-Stroke Spark-Ignition Engines and the Criteria for their Design Ratings” SAE Paper No. 2004-01-1263 2004
- Sauer, C. Kulzer, A. Rauscher, M. Hettinger, A. “Analysis of Different Gasoline Combustion Concepts with Focus on Gas Exchange” SAE Paper No. 2008-01-0427 2008
- Allen, J. Law, D. “Advanced Combustion Using a Lotus Active Valve Train: Internal Exhaust Gas Recirculation Promoted Auto-Ignition” Proceedings of the IFP International Congress 2001 85 100 2001
- Koopmans, L. Strom, H. Lundgren, S. Backlund, O. Denbratt, I. “Demonstrating a SI-HCCI-SI Mode Change on a Volvo 5-Cylinder Electronic Valve Control Engine” SAE Paper No. 2003-01-0753 2003
- Unger, H. Schneider, J. Schwarz, C. Kock, K-F. “VALVETRONIC – Experience from 7 years of Series Production and a Look into the Future” 29. International Wiener Motorensymposium 2008
- Shimizu, K. Fuwa, N. Yoshihara, Y. Hori, K. “The New Toyota variable Valve Timing and Lift System” Aachener Kolloquium Fahrzeug und Motorentechnik 2007
- Tsuruta, S. “The Innovative Variable Valve Event and Lift System (VVEL) for the New Nissan V6 and V8 Engine” 29. International Wiener Motorensymposium 2008
- Fujita, T. Onogawa, K. Kiga, S. Mae, Y. Akasaka, Y. Tomogane, K. “Development of Innovative Variable Valve Event and Lift (VVEL) System” SAE Paper No. 2008-01-1349 2008
- Sellnau, M. Kunz, T. Sinnamon, J. Burkhard, J. “2-step Variable Valve Actuation: System Optimisation and Integration on an SI Engine” SAE Paper No. 2006-01-0040 2006
- Stansfield P.A. Wigley G. Garner C.P. Patel R. Ladommatos N. Pitcher G. Turner J.W.G. Nuglisch H. Helie J. “Unthrottled Engine Operation using Variable Valve Actuation: The Impact on the Flow Field, Mixing and Combustion” SAE Paper No. 2007-01-1414 2007
- Patel, R. Ladommatos, N. Stansfield, P. Wigley, G. Garner, P. Pitcher, G. Turner, J.W.G. Nuglisch, H. “Comparison between Unthrottled, Single and Two-valve Induction Strategies Utilising Direct Gasoline Injection: Emissions, Heat-release and Fuel Consumption Analysis” SAE Paper No. 2008-01-1626 2008
- Malcolm, J.S. Aleiferis, P.G. Todd, A.R. Cairns, A. Hume, A. Blaxill, H. Hoffmann, H. Rueckauf, J. “A Study of Alcohol Blended Fuels in a New Optical Spark Ignition Engine” IMechE Performance, Fuel Economy and Emissions Conference London 2007
- Malcolm, J.S. Aleiferis, P.G. Todd, A.R. Cairns, A. Hoffmann, H. “An Optical Study of Spray Development and Combustion of Ethanol, Iso-Octane and gasoline Blends in a DISI Engine” SAE Paper No. 2008-01-0073 2008
- Lancefield, T. Lawrence, T. Ahmed, A. Hamouda, H.B.H. “VLD – A flexible, modular, cam operated VVA system giving variable valve lift and duration and controlled secondary valve openings” SIA Conference on Variable Valve Actuation 2006
- Bunsen, E. Grote, A. Willand, J. Hoffmann, H. Fritz, O. Senjic, S. “Fuel consumption improvements by variation of intake valve lift and timing – A mechanically fully variable valvetrain system for a 1.6l gasoline engine with direct injection” Haus der Technik Variable Valvetrain Congress 2007