This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Lean Misfire Limits of LPG Fueled S.I. Engine
Technical Paper
2001-01-1960
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The purpose of this research is to investigate the use of local, commercial LPG (liquefied petroleum gas) fueled Spark ignition engine in term of lean misfire limits. A 4-cylinder Suzuki, water-cooled, S.I. engine is tested under different operational conditions ( fuel/air equivalence ratio, ignition timing, engine speed and inlet air temperature ). The engine is tested at elevated inlet air temperatures to simulate the car engine operational conditions during summer season in Kuwait. Results show that ignition timing is strongly affecting the overall engine lean misfire limit. Experimental results showed that the combustion of LPG fueled S.I. engine can be improved by advancing ignition timing. Results also show that as the ignition timing advanced the lean misfire limit decrease due to the enhancement in engine combustion efficiency.
Experimental results show that as the fuel/air equivalence ratio leaned, the MBT ignition timing need to be advanced, where lean mixtures requires advancing in ignition timing to provide more time for reaction due to the excess presence of oxygen in the fuel/air mixture. The engine lean misfire limit increases as the engine speed increase, with the same effect of preheating inlet air temperature, and as the engine load increase, the lean misfire limit increase.
Recommended Content
Topic
Citation
Alasfour, F., "Lean Misfire Limits of LPG Fueled S.I. Engine," SAE Technical Paper 2001-01-1960, 2001, https://doi.org/10.4271/2001-01-1960.Also In
References
- Lutz Barry R. et. al. The Effects of Fuel Composition, System Design, and Operating Conditions on In-System Vaporization and Hot Start of a liquid-phase LPG Injection System SAE Paper 981388 1998
- Poulton, M. L. Alternative Fuels for Road Vehicles Computational
- Mechanics Publications Bellerica, Mass. 1994
- Baljit D. David, C. Tailpipe Emissions Comparison between Propane and Natural Gas Forklifts SAE Paper 2000-01-1865 2000
- Badr, O. Elsayed, N. Karim, G. An Investigation of the Lean Operational Limits of Gas Fueled Spark Ignition ASME, Emerging Energy Technology Conf. 66 43 48 Houston, Texas 1995
- Shresth, S. Karim, G. Wierzba, I. Examination of Operational Limits in Gas Fueled Spark Ignition Engines SAE Paper 2000-01-1944 2000
- Alasfour F. N. “The Effect of Elevated temperatures on Spark Ignition Engine Using 15 % Methanol-gasoline Blend” ASME Conference San Antonio, Texas 34 3 119 129 2000
- Alasfour F. N. “The Effect of Using 30 % Iso-butanol-gasoline Blend on Hydrocarbon Emissions from a Spark Ignition Engine” Energy Sources 21 379 394 1999
- Lechmere T. “Experimental and computational study of spark ignition engine fueled with petrol or natural gas” Experimental and Predictive methods in Research and Development International Conference IMechE Birmingham 79 86 1993
- Taylor C. F. “The Internal Combustion Engines in Theory and Practice” 1 MIT Press Cambridge, Mass. 1982
- Heywood G., B. “Internal Combustion Engine Fundamentals” McGraw Hill 1989