This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Energy Enhanced Adaptive Spark Ignition for Lean Combustion Initiation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
Annotation ability available
For internal combustion engine systems, lean and diluted combustion is an important technology applied for fuel efficiency improvement. Because of the thermodynamic boundary conditions and the presence of in-cylinder flow, the development of a well-sustained flame kernel for lean combustion is a challenging task. Reliable spark discharge with the addition of enhanced delivered energy is thus needed at certain time durations to achieve successful combustion initiation of the lean air-fuel mixture. For a conventional transistor coil ignition system, only limited amount of energy is stored in the ignition coil. Therefore, both the energy of the spark discharge and the duration of the spark discharge are bounded.
To break through the energy limit of the conventional transistor coil ignition system, in this work, an adaptive spark ignition system is introduced. The system has the ability to reconstruct the conductive ion channels whenever it is interrupted during the spark discharge. Furthermore, thanks to the addition of a spark energy management module, the amplitude and the duration of the discharge current are both controllable. As a result, the amplitude of the discharge current can be maintained at a relatively high level within the duration of the spark discharge. Whenever the system detects the interruption of the spark current by external disturbances, such as strong air-motion, the embedded control algorithm in the proposed ignition system would command the generation of multiple consecutive spark breakdowns to reconstruct the conductive ion-channels. With the reestablishment of the conductive ion channels, spark discharge reforms inside the air-fuel mixture. This technique has the potential to improve the flame kernel development in lean air-fuel mixtures. Preliminary ignition tests are conducted in a constant volume optical vessel to demonstrate the performance of the proposed ignition system.
CitationTan, Q., Zheng, M., Wang, L., Li, L. et al., "Energy Enhanced Adaptive Spark Ignition for Lean Combustion Initiation," SAE Technical Paper 2020-01-0841, 2020, https://doi.org/10.4271/2020-01-0841.
- Gallon , E. , Fontana , G. , and Palmaccio , R. Effects of Exhaust Gas Recycle in a Downsized Gasoline Engine J. Appl. Energy 105 99 107 2013
- Yu , X. , Yang , Z. , Yu , S. , Huo , X. et al. Boosted Current Spark Strategy for Lean Burn Spark Ignition Engines SAE Technical Paper 2018-01-1133 2018 https://doi.org/10.4271/2018-01-1133
- Yu , X. , Yang , Z. , Yu , S. , Ives , M. et al. Discharge Characteristics of Current Boosted Spark Events under Flow Conditions ASME Conference Proceeding Paper 2017 10.1115/ICEF2017-3657
- Yang , Z. , Yu , X. , Yu , S. and Chen , J. et al. Impacts of Spark Discharge Current and Duration on Flame Development of Lean Mixtures under Flow Conditions ASME Conference Proceeding Paper 2018 10.1115/ICEF2018-9771
- Suzuki , K. , Uehara , K. , Murase , E. , and Nogawa , S. Study of Ignitability in Strong Flow Field Ignition Systems for Gasoline, Engines, 3rd International Conference 2016 Berlin, Germany
- Takahashi , D. , Nakata , K. , Yoshihara , Y. , Ohta , Y. et al. Combustion Development to Achieve Engine Thermal Efficiency of 40% for Hybrid Vehicles SAE Technical Paper 2015-01-1254 2015 https://doi.org/10.4271/2015-01-1254
- Huang , C. , Shy , S. , Liu , C. , and Yan , Y. A Transition on Minimum Ignition Energy for Lean Turbulent Methane Combustion in Flamelet and Distributed Regimes Proc. Combustion Inst. 31 1 1401 1409 2007
- Hamai , K. , Kawajiri , H. , Ishizuka , T. , and Nakai , M. Combustion Fluctuation Mechanism Involving Cycle-to-Cycle Spark Ignition Variation Due to Gas Flow Motion in SI Engines Symposium (International) on Combustion 21 1 505 512 1988
- Yu , X. , Yu , S. , Yang , Z. , Tan , Q. et al. Improvement on Energy Efficiency of the Spark Ignition System SAE Technical Paper 2017-01-0678 2017 https://doi.org/10.4271/2017-01-0678
- Brandt , M. , Hettinger , A. , Schneider , A. , Senftleben , H. et al. Extension of Operating Window for Modern Combustion Systems by High Performance Ignition Ignition Systems for Gasoline, Engines, 3rd International Conference 2016 Berlin, Germany
- Yu , S. , Xie , K. , Han , X. , Jeftic , M. et al. A Preliminary Study of the Spark Characteristics for Unconventional Cylinder Charge with Strong Air Movement ASME 2011 Internal Combustion Engine Division Fall Technical Conference Oct. 2-5, 2011 West Virginia
- Chang , Y. , Yang , Z. , Yu , S. , Xu , M. et al. A Study of Energy Enhanced Multi-Spark Discharge Ignition in a Constant-Volume Combustion Chamber SAE Technical Paper 2019-01-0728 2019 https://doi.org/10.4271/2019-01-0728