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The HOTFIRE Homogeneous GDI and Fully Variable Valve Train Project - An Initial Report
Technical Paper
2006-01-1260
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
There is a great deal of interest in new technologies to assist in reducing the CO2 output of passenger vehicles, as part of the drive to meet the limits agreed by the EU and the European Automobile Manufacturer's Association ACEA, itself a result of the Kyoto Protocol. For the internal combustion engine, the most promising of these include gasoline direct injection, downsizing and fully variable valve trains.
While new types of spray-guided gasoline direct injection (GDI) combustion systems are finally set to yield the level of fuel consumption improvement which was originally promised for the so-called ‘first generation’ wall- and air-guided types of GDI, injectors for spray-guided combustion systems are not yet in production to help justify the added complication and cost of the NOx trap necessary with a stratified combustion concept. Conversely, hardware suitable for homogeneous combustion systems is available now and this approach offers the advantage that simple three-way catalysis only needs to be used for exhaust gas aftertreatment. This in turn means that homogeneous GDI is a technology applicable to a world-wide market, because NOx traps are susceptible to poisoning by sulphur, such as is to be found in high concentrations in US gasolines.
Advanced mechanically-variable valve trains are in production now, which considerably reduce pumping losses in the 4-stroke engine over the conventional ‘variable density’ type of throttling. Fully variable valve trains are being developed to production, too. These technologies allow throttling loss to be addressed directly rather than by the more circuitous route of stratified charge combustion. While homogeneous combustion systems with load control by valve event may not offer the ultimate thermodynamic benefits of stratified charge, the fuel consumption improvement possibilities are still considerable, relative to a state-of-the-art port fuel injection engine.
The present work discusses the start of the HOTFIRE consortium project which is a three-year programme to investigate the strong interactions and synergies between homogeneous GDI and fully variable valve train systems. Initial results from the consortium's high-speed optical access engine, fitted with a research fully variable valve train system, are presented. Work responsibilities within the project are discussed together with the potential of the assembled test equipment to look at the interaction between variable valve trains and spray-guided GDI systems in the future.
Recommended Content
Authors
- J. W. G. Turner - Lotus Engineering
- G. Pitcher - Lotus Engineering
- P. Burke - Lotus Engineering
- C. P. Garner - Loughborough University
- G. Wigley - Loughborough University
- P. Stansfield - Loughborough University
- H. Nuglisch - Siemens VDO Automotive
- N. Ladommatos - University College London
- R. Patel - University College London
- P. Williams - University College London
Topic
Citation
Turner, J., Pitcher, G., Burke, P., Garner, C. et al., "The HOTFIRE Homogeneous GDI and Fully Variable Valve Train Project - An Initial Report," SAE Technical Paper 2006-01-1260, 2006, https://doi.org/10.4271/2006-01-1260.Also In
References
- http://unfccc.int/essential_background/feeling_the_heat/items/2879.php
- “Monitoring of ACEA's Commitmment on CO 2 Emission Reductions from Passenger Cars (2003) - Final Report 05.10.2004” European Automobile Manufacturer's Association and the Commission Services 2004
- Turner, J.W.G. Pearson, R.J. Kenchington, S.A. “Concepts for Improved Fuel Economy from Gasoline Engines” JER03504, Int. J. Engine Res. 6 2005
- Gunston, B “World Encyclopaedia of Aero Engines” Patrick Stephens Limited Sparkford, Yeoville, Somerset, BA22 7JJ, UK 1995 3rd 49 50 1-85260-509-X.
- Ando, H. “Combustion control technologies for gasoline engines” I. Mech. E. Seminar on Lean Burn Combustion Engines 3 4 December 1996
- Wurms, R. Grigo, M. Hatz, W. “Audi FSI Technology - Improved performance and reduced fuel consumption” ATA 56 3 4 March-April 2003
- Zhao, F. Harrington, D. Lai, M.-C. “Automotive Gasoline Direct-Injection Engines” Society of Automotive Engines, Inc. Warrendale, PA 2002 0-7680-0882-4
- Achleitner, A. Berger, S. Frenzel, H. Klepatsch, M. Warnecke, W. ““Benzin-Direkt-einspritzungsystem mit Piezo-Injektor für strahlgeführte Brennverfahren” MTZ May 2005
- Klüting, M. Missy, S. Schwarz, C. “Potentials of the Spray-guided Petrol Direct Injection Combustion System in Combination with Turbo Charging” 26th Vienna Motor Symposium 2004
- Befrui, B. Kneer, R. Deliege, C. Wanlin, H. Weiten, C. “Spray-Guided DISI Alternative Combustion Modes and Their Implications for Fuel Economy and Emissions” Global Powertrain Congress Ann Arbor, Michigan September 2003
- Tuttle, J. “Controlling Engine Load by Means of Late Intake-Valve Closing” SAE paper number 800794 1980
- Tuttle, J. “Controlling Engine Load by Means of Early Intake-Valve Closing”. SAE paper number 820408 1982
- Schausberger, C. Bachmann, P. Borgmann, K. Hofmann, R. Lieble, J. “The New BMW Otto Engine Generation” 10. Aachener Kolloquium Fahrzeug- und Motortechnik Aachen, Germany October 2001
- Lang, O. “Boosting and Direct Injection - Synergies for Future Gasoline Engines” SAE paper number 2005-01-1144 Detroit April 2005
- Griffiths, J.F. Barnard, J.A. “Flame and Combustion” Blackie Academic & Professional 3rd 1995 0 7514 0199 4
- Klüting, M. Missy, S. Schwarz, C. “Turbocharging of a Spray-Guided Gasoline Direct Injection Combustion System - a good fit?” JSAE paper number 20055412 Yokohama May 2005
- Drangel, H. Bergsten, L. “The new Saab SVC Engine - An Interaction of Variable Compression Ratio, High Pressure Supercharging and Downsizing for Considerably Reduced Fuel Consumption” Aachen Colloquium October 2000
- Turner, J. Pearson, R. Bassett, M. Blundell, D. Taitt, D. “The Turboexpansion Concept - Initial Dynamometer Results” SAE paper number 2005-01-1853 2005
- Turner, J. Kenchington, S. Stretch, D. “Production AVT development: Lotus and Eaton's electrohydraulic closed-loop fully variable valve train system” 25th Vienna Motor Symposium 2004
- Wunderlich, K. Enderle, C. Keller, U. Kaufmann, T. “The Electronic Valve Control as a Fuel Saving Future Technology of Contradiction in Terms Between Variability, Complexity, and Cost” Oral presentation: 24th Vienna Motor Symposium April 2003
- Turner, J. Bassett, M. Pearson, R.J. Pitcher, G. Douglas, K. “New Operating Strategies Afforded by Fully Variable Valve Trains” SAE paper number 2004-01-1386 , 2004 and SAE 2004 Transactions July 2005
- Tai C. Tsao T.-C. Levin M. Barta G. Schechter M. “Using Camless Valvetrain for Air Hybrid Optimization” SAE paper number 2003-01-0038 2003
- Turner, J. Pearson, R. “Future Gasoline Engine Technologies Enabled by Fully Variable Valve Trains” MTZ Engine Conference Ingolstadt February 2005
- Osborne, R.J. Stokes, J. Lake, T.H. Carden, P.J. Mullineux, J.D. Helle-Lorentzen, R. Evans, J.C. Heikal, M.R. Zhu, Y. Zhao, H. Ma, T. “Development of a Two-Stroke/Four-Stroke Switching Gasoline Engine - The 2/4SIGHT Concept” SAE paper number 2005-01-1137 2005
- Milovanovic, M. Blundell, D. Turner, J. Duret, P. Gatellier, B. Montero, L. Miche, M. Zima, P. Anca, R. Maroteaux, D. Guezet, J. Spinnler, F. Zhao, H. Perotti, M. Araneo, L. “The use of Fully Variable Valve Train to investigate Valve Events for HCCI in High Speed Direct Injection Diesel Engines” ATA paper number 04A5016, ATA International Symposium - ‘Diesel Engine: The NOx and PM Emissions Challenge’ Monopoli October 2004
- Milovanovic, M. Blundell, D. Turner, J. “Transition Quality Between Spark Ignition and Homogeneous Charge Compression Ignition Modes Using Two Different VVT strategies: Cam Profile Switching and Phasing Strategy vs Fully Variable Valve Train Strategy” JSAE paper number 20055406 Yokohama May 2005
- Bernard, L. Ferrari, A. Rinolfi, R. Vafidis, C. “Fuel Economy Improvement Potential of Uniair Throttleless Technology” ATA paper number 02A5012
- Mischker, K. Denger, D. “Requirements for a Fully Variable Valvetrain and Realization with the Electro-Hydraulic Valvetrain System EHVS” Proceedings of the 24 th International Vienna Engine Symposium Vienna May 2003 160 176
- Turner, C. Babbit, G. Balton, C. Raimao, M. Giordano, D. “Design and Control of a Two-Stage, Electro-Hydraulic Valve Actuation System” SAE paper number 2004-01-1265 2004
- Turner, J. Blundell, D. Bassett, M. Pearson, R. “The Impact on Engine Performance of Controlled Auto Ignition versus Spark Ignition with Two Methods of Load Control” Global Powertrain Congress Ann Arbor September 2002
- Milovanovic, N. Turner, J.W.G. Kenchington, S. A. Pitcher, G. Blundell, D. “Active valve train for homogeneous charge compression ignition” Int. J. Engine Res. 2005
- Bowditch, F. “A New Tool for Combustion Research” SAE paper number 610002 1961
- Wigley, G. Garner, C. P. Stansfield, P. Pitcher, G. Turner, J. Nuglisch, H. “Air-Fuel Mixing in a Homogeneous Direct Injection Spark Ignition Engine with a Fully Variable Valve Train System” Haus der Technik Munich March 2005
- Kawamoto, M. Honda, T. Katashiba, H. Sumida, M. Fukutomi, N. Kawajiri, K. “A Study of Center and Side Injection in Spray Guided DISI Concept” SAE paper number 2005-01-0106 Detroit April 2005
- Hunzinger, M. Pfeil, J. Velji, A. Spicher, U. Altenschmidt, F. Schaupp, U. Waltner, A. “Optical Investigation of Fuel Injection, Charge Motion and Local Air/Fuel-Ratio at the Spark Plug Inside a Gasoline Direct Injection Engine with Spray Guided Combustion Concept” Haus der Technik Munich March 2005