This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Combustion Mode Switch by Integrating Stoichiometric ASSCI Mode in a Four-cylinder Gasoline SI/HCCI Engine
Technical Paper
2014-01-1288
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Homogeneous Charge Compression Ignition (HCCI) and Spark Ignition (SI) dual-mode operation provides a practical solution to apply HCCI combustion in gasoline engines. However, the different requirements of air-fuel ratio and EGR ratio between HCCI combustion and SI combustion results in enormous control challenges in HCCI/SI mode switch.
In this paper, HCCI combustion was achieved in a four-cylinder gasoline direct injection engine without knock and misfire using close-loop control by knock index. Assisted Spark Stratified Compression Ignition (ASSCI) combustion was obtained stably at medium-high load. ASSCI combustion exhibits two-stage heat release with initial flame propagation and controlled auto-ignition. The knock index of ASSCI combustion is less than HCCI combustion due to the lower pressure rise rate. The stable operation range of stoichiometric ASSCI combustion is from 0.35MPa to 0.65MPa Indicated Mean Effective Pressure (IMEP), which is higher than normal gasoline HCCI combustion. Therefore, ASSCI mode naturally fills the gap between HCCI at low load and SI combustion at high load in gasoline HCCI engine. Applying ASSCI strategy can effectively reduce the frequency of engine combustion mode switch.
HCCI/SI and ASSCI/SI combustion mode switch were investigated and compared in a four-cylinder GDI engine which was equipped with dual VVT (intake and exhaust), two-stage cam-profile system (CPS) and electronic throttle control (ETC). Experimental results indicated that, fuel injection in compression stroke in ASSCI mode can avoid the misfire and improve stability of switching process without the requirement of changing control variables such as throttle, CPS and injection strategy simultaneously. Meanwhile, ASSCI combustion mode can extend the load range of the compression ignition (CI). Stable HCCI/ASSCI switch was achieved by adjusting s negative valve overlap (NVO) duration only. It is therefore concluded that the switch control strategy of ASSCI/SI combustion was optimized by stoichiometric operation before/after switch and the robust combustion switch was achieved.
Recommended Content
Authors
Topic
Citation
Li, D., Wang, Z., Liu, H., and Wang, J., "Combustion Mode Switch by Integrating Stoichiometric ASSCI Mode in a Four-cylinder Gasoline SI/HCCI Engine," SAE Technical Paper 2014-01-1288, 2014, https://doi.org/10.4271/2014-01-1288.Also In
References
- Homogeneous Charge Compression Ignition (HCCI) of Diesel Fuel SAE Technical Paper 971676 1997 10.4271/971676
- Kakuya , H. , Yamaoka , S. , Kumano , K. , and Sato , S. Investigation of a SI-HCCI Combustion Switching Control Method in a Multi-Cylinder Gasoline Engine SAE Technical Paper 2008-01-0792 2008 10.4271/2008-01-0792
- Tian , G. , Wang , Z. , Ge , Q. , Wang , J. et al. Mode Switch of SI-HCCI Combustion on a GDI Engine SAE Technical Paper 2007-01-0195 2007 10.4271/2007-01-0195
- Tian G. , Wang Z. , Wang J. , Xu H.M. , Shuai S. Effects of Key Factors on the Engine Combustion Mode Switching Between HCCI and SI Journal of Engineering for Gas Turbines and Power, ASME 2009
- Zhang , Y. , Xie , H. , Zhou , N. , Chen , T. et al. Study of SI-HCCI-SI Transition on a Port Fuel Injection Engine Equipped with 4VVAS SAE Technical Paper 2007-01-0199 2007 10.4271/2007-01-0199
- Santoso , H. , Matthews , J. , and Cheng , W. Managing SI/HCCI Dual-Mode Engine Operation SAE Technical Paper 2005-01-0162 2005 10.4271/2005-01-0162
- Franz , J. , Schwarz , F. , Guenthner , M. , Reissing , J. et al. Closed Loop Control of an HCCI Multi-Cylinder Engine and Corresponding Adaptation Strategies SAE Technical Paper 2009-24-0079 2009 10.4271/2009-24-0079
- Koopmans , L. and Denbratt , I. A Four Stroke Camless Engine, Operated in Homogeneous Charge Compression Ignition Mode with Commercial Gasoline SAE Technical Paper 2001-01-3610 2001 10.4271/2001-01-3610
- Wagner , R. , Edwards , K. , Daw , C. , Green , J. et al. On the Nature of Cyclic Dispersion in Spark Assisted HCCI Combustion SAE Technical Paper 2006-01-0418 2006 10.4271/2006-01-0418
- Zhang , Y. , Xie , H. , Zhou , N. , Chen , T. et al. Study of SI-HCCI-SI Transition on a Port Fuel Injection Engine Equipped with 4VVAS SAE Technical Paper 2007-01-0199 2007 10.4271/2007-01-0199
- Fuerhapter , A. , Piock , W. , and Fraidl , G. CSI - Controlled Auto Ignition - the Best Solution for the Fuel Consumption - Versus Emission Trade-Off? SAE Technical Paper 2003-01-0754 2003 10.4271/2003-01-0754
- Wang , Z. , Wang , J. , Shuai , S. , and Ma , Q. Effects of Spark Ignition and Stratified Charge on Gasoline HCCI Combustion With Direct Injection SAE Technical Paper 2005-01-0137 2005 10.4271/2005-01-0137
- Persson , H. , Johansson , B. , and Remón , A. The Effect of Swirl on Spark Assisted Compression Ignition (SACI) SAE Technical Paper 2007-01-1856 2007 10.4271/2007-01-1856
- Reuss D L 1, Kuo T-W 1, Silvas G 1, Natarajan V 2, and Sick V 2
- Urushihara , T. , Yamaguchi , K. , Yoshizawa , K. , and Itoh , T. A Study of a Gasoline-fueled Compression Ignition Engine ~ Expansion of HCCI Operation Range Using SI Combustion as a Trigger of Compression Ignition ~ SAE Technical Paper 2005-01-0180 2005 10.4271/2005-01-0180
- Persson , H. , Johansson , B. , and Remón , A. The Effect of Swirl on Spark Assisted Compression Ignition (SACI) SAE Technical Paper 2007-01-1856 2007 10.4271/2007-01-1856
- Lavoie George A. , Martz J. , Wooldridge M. , Assanis D. A multi-mode combustion diagram for spark assisted compression ignition Combustion and Flame 157 2010 1106 1110
- Zhi Wang , Xu He , Jian-Xin Wang , Shuai Shijin , Fan Xu , Dongbo Yang Combustion visualization and experimental study on spark induced compression ignition (SICI) in gasoline HCCI engines Energy Conversion and Management 51 2010 908 917
- Manofsky , L. , Vavra , J. , Assanis , D. , and Babajimopoulos , A. Bridging the Gap between HCCI and SI: Spark-Assisted Compression Ignition SAE Technical Paper 2011-01-1179 2011 10.4271/2011-01-1179
- Zhi Wang Numerical Simulation and Experimental Research of Gasoline HCCI Combustion with Direct Injection PhD Dissertation Tsinghua University China 2005
- Zhi Wang , Jianxin Wang , Shijin Shuai , Qing-Jun Ma New Gasoline ‘HCCI’ combustion system using two-stage direct injection and assisted spark ignition Journal of Automobile Engineering 2006 220 D3 367 378
- Jianxin Wang , Shijin Shuai , Zhi Wang Research on combustion characteristics of HCCI based on gasoline direct injection Journal of Engineering Thermophysics 2008 29 1 157 160
- Zhi Wang , Jianxin Wang , Shijin Shuai Experimental and computational studies on gasoline HCCI combustion control using injection strategies Journal of Engineering for Gas Turbines and Power 2007 129 03 870 876
- Zhi Wang , Wang JX , Shuai SJ , Tian GH. Study of Multimode Combustion System with Gasoline Direct Injection. Journal of engineering for gas turbines and power Transactions of the ASME 2007 129 4 1079 1087