This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Gasoline Partially Premixed Combustion in a Light Duty Engine at Low Load and Idle Operating Conditions
Technical Paper
2012-01-0687
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Partially premixed combustion (PPC) has the potential of high efficiency and simultaneous low soot and NOx emissions. Running the engine in PPC mode with high octane number fuels has the advantage of a longer premix period of fuel and air which reduces soot emissions, even at higher loads. The problem is the ignitability at low load and idle operating conditions.
The objective of this study is investigation of the low load limitations with gasoline fuels with octane numbers RON 69 and 87. Measurements with diesel fuel were also taken as reference. The experimental engine is a light duty diesel engine equipped with a fully flexible valve train system. Trapped hot residual gases using negative valve overlap (NVO) is the main parameter of interest to potentially increase the attainable operating region of high octane number gasoline fuels.
Much lower soot is emitted with 69 and 87 RON gasoline compared to diesel at engine loads 1 bar IMEPgross to 3 bar IMEPgross but the combustion efficiency is significantly lower with gasoline at low load compared to diesel. Combustion efficiency increases with NVO for both diesel and gasoline. The 69 RON gasoline fuel can be run at idle (1 bar IMEPgross) operating conditions without a significant fraction of trapped hot residual gases. The 87 RON gasoline fuel could be run at 2 bar IMEPgross but with a high setting of NVO. There is a clear decrease of net indicated efficiency with NVO because of the decrease in gas-exchange efficiency. To achieve highest possible efficiency for a given fuel, at low load, as low as possible NVO should be used.
Recommended Content
Authors
Topic
Citation
Borgqvist, P., Tunestal, P., and Johansson, B., "Gasoline Partially Premixed Combustion in a Light Duty Engine at Low Load and Idle Operating Conditions," SAE Technical Paper 2012-01-0687, 2012, https://doi.org/10.4271/2012-01-0687.Also In
References
- Kimura, S. Aoki, O. Ogawa, H. Muranaka, S. et al. “New Combustion Concept for Ultra-Clean and High-Efficiency Small DI Diesel Engines,” SAE Technical Paper 1999-01-3681 1999 10.4271/1999-01-3681
- Akihama, K. Takatori, Y. Inagaki, K. Sasaki, S. et al. “Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature,” SAE Technical Paper 2001-01-0655 2001 10.4271/2001-01-0655
- Yanigahara, H. Sato, Y. Minuta, J. “A simultaneous reduction in NOx and soot in diesel engines under a new combustion system (Uniform Bulky Combustion System - UNIBUS)” 17 th International Vienna Motor Symposium 303 314 1996
- Hasegawa, R. Yanagihara, H. “HCCI Combustion in DI Diesel Engine,” SAE Technical Paper 2003-01-0745 2003 10.4271/2003-01-0745
- Kalghatgi, G. Risberg, P. Ångström, H. “Advantages of Fuels with High Resistance to Auto-ignition in Late-injection, Low-temperature, Compression Ignition Combustion,” SAE Technical Paper 2006-01-3385 2006 10.4271/2006-01-3385
- Kalghatgi, G. Risberg, P. Ångström, H. “Partially Pre-Mixed Auto-Ignition of Gasoline to Attain Low Smoke and Low NOx at High Load in a Compression Ignition Engine and Comparison with a Diesel Fuel,” SAE Technical Paper 2007-01-0006 2007 10.4271/2007-01-0006
- Kalghatgi, G. T. Hildingsson, L. Johansson, B. “Low NOx and Low Smoke Operation of a Diesel Engine using Gasoline-like Fuels” ICES2009-76034
- Hildingsson, L. Kalghatgi, G. Tait, N. Johansson, B. et al. “Fuel Octane Effects in the Partially Premixed Combustion Regime in Compression Ignition Engines,” SAE Technical Paper 2009-01-2648 2009 10.4271/2009-01-2648
- Kalghatgi, G.T. Hildingsson, L. Harrison, A. Johansson, B. “Low- NOx, low-smoke operation of a diesel engine using “premixed enough” compression ignition - Effects of fuel autoignition quality, volatility and aromatic content” THISEL 2010 Conference on Thermo- and Fluid Dynamic Processes in Diesel Engines
- Manente, V. Johansson, B. Tunestal, P. Cannella, W. “Effects of Different Type of Gasoline Fuels on Heavy Duty Partially Premixed Combustion,” SAE Int. J. Engines 2 2 71 88 2010 10.4271/2009-01-2668
- Manente, V. Zander, C. Johansson, B. Tunestal, P. et al. “An Advanced Internal Combustion Engine Concept for Low Emissions and High Efficiency from Idle to Max Load Using Gasoline Partially Premixed Combustion,” SAE Technical Paper 2010-01-2198 2010 10.4271/2010-01-2198
- Manente, V. Johansson, B. Tunestal, P. Sonder, M. Serra, S. ”Gasoline Partially Premixed Combustion: High Efficiency, Low NOx and Low Soot by using an Advanced Combustion Strategy and a Compression Ignition Engine” FCE09 Istanbul Turkey
- Solaka, H. Aronsson, U. Tuner, M. Johansson, B. “Investigation of Partially Premixed Combustion Characteristics in Low Load Range with Regards to Fuel Properties in a Light Duty Diesel Engine,” SAE Technical Paper 2012-01-0684 2012
- Borgqvist, P. Tunestål, P. Johansson, B. “Investigation and Comparison of Residual Gas Enhanced HCCI using Trapping (NVO HCCI) or Rebreathing of Residual Gases,” SAE Technical Paper 2011-01-1772 2011 10.4271/2011-01-1772
- Widd, A. Johansson, R. Borgqvist, P. Tunestål, P. et al. “Investigating Mode Switch from SI to HCCI using Early Intake Valve Closing and Negative Valve Overlap,” SAE Technical Paper 2011-01-1775 2011 10.4271/2011-01-1775
- Trajkovic, S. Milosavljevic, A. Tunestål, P. Johansson, B. “FPGA Controlled Pneumatic Variable Valve Actuation,” SAE Technical Paper 2006-01-0041 2006 10.4271/2006-01-0041
- Tomoda, T. Ogawa, T. Ohki, H. Kogo, T. Nakatani, K. Hashimoto, E. “Improvement of Diesel Engine Performance by Variable Valve Train System” 30 Internationales Wiener Motorensymposium 2009
- Rothamer, A. Snyder, J. Hanson, R. Steeper, R. Fitzgerald, R. ”Simultaneous imaging of exhaust gas residuals and temperature during HCCI combustion” Proceedings of the Combustion Institute 32 2009 2869 2876
- Akihama, K. Takatori, Y. Inagaki, K. Sasaki, S. et al. “Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature,” SAE Technical Paper 2001-01-0655 2001 10.4271/2001-01-0655
- Urushihara, T. Hiraya, K. Kakuhou, A. Itoh, T. “Expansion of HCCI Operating Region by the Combination of Direct Fuel Injection, Negative Valve Overlap and Internal Fuel Reformation,” SAE Technical Paper 2003-01-0749 2003 10.4271/2003-01-0749