This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Increasing Modern Spark Ignition Engine Efficiency: A Comprehension Study of High CR and Atkinson Cycle
Technical Paper
2016-01-2172
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Increasing global efficiency of direct injection spark ignition (DISI) engine is nowadays one of the main concerns in automotive research. A conventional way to reduce DISI engine fuel consumption is through downsizing. This approach is well suited to the current homologation cycle as NEDC, but has the drawback to induce over-consumptions in customer real driving usage. Moreover, the driving cycles dedicated to EURO 6d and future regulations will evolve towards higher load operating conditions with higher particulate emissions. Therefore, efficiency of current DISI has to be strongly increased, for homologation cycle and real driving conditions. This implies to deeply understand and improve injection, mixing and flame propagation processes. This work proposes an alternative way to improve the thermodynamic efficiency of the combustion system, by coupling an increase of Compression Ratio (CR) with high levels of Exhaust Gas Recirculation (EGR) and the setup of Miller/Atkinson cycle at intake. The study is focused on the understanding of the physical phenomena involved by high CR and Miller/Atkinson type cycle. Particularly, the impact on turbulence level, air-fuel mixture, combustion efficiency and final global efficiency is assessed. Several tools presented here are used to optimize an existing downsized DISI engine: optical diagnostics, 3D simulation, and single cylinder engine optimization. Then, the impacts of the different technological components (CR, Intake valve opening duration, Valve timing, EGR…) is detailed. Finally the obtained results are discussed to draw some perspectives on the best suited engine architecture.
Recommended Content
Authors
- Matthieu Cordier - IFP Energies nouvelles, Institut Carnot IFPEN TE
- Olivier Laget - IFP Energies nouvelles, Institut Carnot IFPEN TE
- Florence Duffour - IFP Energies nouvelles, Institut Carnot IFPEN TE
- Xavier Gautrot - IFP Energies nouvelles, Institut Carnot IFPEN TE
- Loic De Francqueville - IFP Energies nouvelles, Institut Carnot IFPEN TE
Topic
Citation
Cordier, M., Laget, O., Duffour, F., Gautrot, X. et al., "Increasing Modern Spark Ignition Engine Efficiency: A Comprehension Study of High CR and Atkinson Cycle," SAE Technical Paper 2016-01-2172, 2016, https://doi.org/10.4271/2016-01-2172.Also In
References
- International Energy Agency https://www.iea.org
- Watanabe , S. , Koga , H. , and Kono , S. Research on Extended Expansion General-Purpose EngineTheoretical Analysis of Multiple Linkage System and Improvement of Thermal Efficiency SAE Technical Paper 2006-32-0101 2006 10.4271/2006-32-0101
- Martins , J. , Uzuneanu , K. , Ribeiro , B. , and Jasasky , O. Thermodynamic Analysis of an Over-expanded engine SAE Technical Paper 2004-01-0617 2004 10.4271/2004-01-0617
- Mallikarjuna , J. and Ganesan , V. Theoretical and Experimental Investigations of Extended Expansion Concept for SI Engines SAE Technical Paper 2002-01-1740 2002 10.4271/2002-01-1740
- Boretti , A. and Scalzo , J. Exploring the Advantages of Atkinson Effects in Variable Compression Ratio Turbo GDI Engines SAE Technical Paper 2011-01-0367 2011 10.4271/2011-01-0367
- Gheorghiu , V. Ultra-Downsizing of Internal Combustion Engines SAE Technical Paper 2011-28-0049 2011 10.4271/2011-28-0049
- Zaccardi , J. , Pagot , A. , Vangraefschepe , F. , Dognin , C. et al. Optimal Design for a Highly Downsized Gasoline Engine SAE Technical Paper 2009-01-1794 2009 10.4271/2009-01-1794
- Hitomi , M. , Sasaki , J. , Hatamura , K. , and Yano , Y. Mechanism of Improving Fuel Efficiency by Miller Cycle and Its Future Prospect SAE Technical Paper 950974 1995 10.4271/950974
- Scheidt , M. , Brands , C. , Kratzsch , M. and Günther , M. Combined Miller/Atkinson Strategy for future downsizing concepts MTZ May 2014
- Akihisa , D. and Daisaku , S. Research on Improving Thermal Efficiency through Variable Super-High Expansion Ratio Cycle SAE Technical Paper 2010-01-0174 2010 10.4271/2010-01-0174
- Bohbot J. , Gillet N. , and Benkenida A. IFP-C3D: an Unstructured Parallel Solver for Reactive Compressible Gas Flow with Spray Oil & Gas Science and Technology 64 3 309 335 2009
- Knop , V. , Michel , J.-B. and Colin , O. On the use of a tabulation approach to model auto-ignition during flame propagation in SI engines Appl. Energy 88 4968 4979 2011
- Colin O. , da Cruz A. Pires , and Jay S. Detailed chemistry-based auto-ignition model including low temperature phenomena applied to 3-D engine calculations Proceedings of the Combustion Institute 30 2649 2656 2005
- Colin O. and Truffin K. A spark ignition model for large eddy simulation based on an FSD transport equation (ISSIM-LES) Proc. of the Combust. Inst. 33 2 3097 3104 2011
- Han , Z. and Reitz , R. D. Turbulence modeling of internal combustion engines using RNG k-ε models Combust. Sci. Technol. 106 267 295 1995
- Kays , W. M. and Crawford , M. E. Convective heat and mass transfer 3rd McGraw-Hill 1994
- Reitz , R.D. Modeling atomization processes in high pressure vaporizing sprays Atomization Spray Technol. 3 309 337