This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
End-Gas Temperature Measurements in a DOHC Spark-Ignition Engine Using CARS
Technical Paper
2000-01-0237
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
CARS temperature measurements were carried out both in a constant volume combustion chamber and in a spark-ignition engine. The CARS temperature measurement under engine-like condition was validated by comparing the unburned gas temperatures for premixed propane-air flame in a constant volume combustion chamber obtained by CARS with predicted temperatures of 2-zone flame propagation simulation model. There was good agreement between the predicted temperatures and the mean values of 10 CARS measurements. The standard deviation of 10 measurements at each measuring timing was about ±40 K. End-gas temperatures were measured by CARS technique in a conventional 4-cylinder DOHC spark-ignition engine with the engine motoring and firing. The measured motoring temperature matched well with the adiabatic core temperature calculated from the measured cylinder pressure. The engine was fueled with primary reference fuel (PRF80) of 80% iso-octane and 20% n-heptane by volume. The engine was operated under 1200 rpm, wide open throttle condition and spark ignition timing was varied. CARS spectra of 150 consecutive cycles at different crank angles were acquired. Cylinder pressure was measured simultaneously with CARS signal and used as a parameter on fitting CARS spectrum to the library of theoretical spectra. Significant heating by pre-flame reaction in the end gas was observed in the late part of compression stroke under both knocking and non-knocking condition. Standard deviations of burned end-gas temperatures were larger than those of unburned end-gas temperatures due to the cyclic variation of combustion and turbulent flow after combustion.
Authors
Topic
Citation
Choi, I., Chun, K., Park, C., and Hahn, J., "End-Gas Temperature Measurements in a DOHC Spark-Ignition Engine Using CARS," SAE Technical Paper 2000-01-0237, 2000, https://doi.org/10.4271/2000-01-0237.Also In
Combustion, Flow Diagnostics, and In-Cylinder Velocity Measurement
Number: SP-1529; Published: 2000-03-06
Number: SP-1529; Published: 2000-03-06
References
- Heywood, J. B. “ Internal Combustion Engine Fundamentals ” McGraw Hill Book Co. 1988
- Hu, H. Keck, J. “Autoignition of Adiabatically Compressed Combustible Gas Mixtures” SAE Paper 872110 1987
- Chun, K. M. Heywood, J. B. Keck, J. C. “Prediction of Knock Occurrence in a Spark-Ignition Engine” 22 nd Symposium (International) on Combustion 455 463 1988
- Westbrook, C. K. Warnatz, J. Pitz W. J. “A Detailed chemical Kinetic Reaction Mechanism for the Oxidation of iso-Octane and n-Heptane over an Extended Temperature Range and its Application to Analysis of Engine Knock” 22 nd Symposium (International) on Combustion 893 901 1988
- Cowart, J. S. Keck, J. C. Heywood, J. B. Westbrook, C. K. Pitz, W. J. “Engine Knock Predictions Using a Fully-Detailed and a Reduced Chemical Kinetic Mechanism” 23 rd Symposium (International) on Combustion 1055 1062 1990
- Bengtsson, P.-E. Martinsson, L. Alden, M. Johansson, B. Marforio, K. Lundholm, G. “Dual Broadband Rotational CARS Measurements in an IC Engine” 25 th Symposium (International) on Combustion 1735 1742 1994
- Stenhouse, I. A. Williams, D. R. Cole, J. B. Swords, M. D. “CARS Measurements in an Internal Combustion Engine” Applied Optics 18 22 3819 3825 1979
- Klick, D. Marko, K. A. Rimai, L. “Broadband Single-Pulse CARS Spectra in a Fired Internal Combustion Engine” Applied Optics 20 7 1178 1181 1981
- Rahn, L. A. Johnston, S. C. Farrow, R. L. Mattern, P. L. “CARS Thermometry in an Internal Combustion Engine” American Institute of Physics 609 613 1982
- Lucht, R. P. Teets, R. E. Green, R. M. Palmer, R. E. Ferguson, C. R. “Unburned Gas Temperature in an Internal Combustion Engine. I:CARS Temperature Measurements” Combust. Sci. and Tech. 55 41 61 1987
- Greenhalgh, D. A. Williams, D. R. Baker, C. A. 16th ISATA Conf. Florence 487 508 1987
- Nakada, T. Itoh, T. Takagi, Y. “Unburnt Gas Temperature Measurement Using Single Shot CARS in a Spark Ignition Engine” COMODIA 90 393 398 1990
- Cottereau, M. J. Grisch, F. Marie, J. J. “CARS Measurements of Temperature and Species Concentrations in an IC Engine” Appl. Phys. B 50 63 66 1990
- Lebel, M. Cottereau, M. J. “Study of the Effect of the Residual Gas Fraction on Combustion in a S.I. Engine Using Simultaneous CARS Measurements of Temperature and CO 2 Concentration” SAE Paper 922388 1992
- Nakada, T. Itoh, T. Takagi, Y. “Application of CARS to Development of High Compression Ratio Spark Ignition Engine” SAE Paper 932644 1993
- Bradley, D. Kalghatgi, G. T. Morley, C. Snowdon, P. Yeo, J. “CARS Temperature Measurement and the Cyclic Dispersion of Knock in Spark Ignition Engine” 25 th Symposium(International) on Combustion 1994
- Kalghatgi, G. T. Snowdon, P. McDonald, C. R. “Studies of Knock in a Spark Ignition Engine with “CARS” Temperature Measurements and Using Different Fuels” SAE paper 950690 1995
- Nakano, M. Nakahara, S. Akihama, K. Kubo, S. Yamazahi, S. “Prediction of the Knock Onset and the Effects of Heat Release Pattern and Unburned Gas Temperature on Torque at Knock Limit in S.I. Engines” SAE Paper 952408 1995
- Bradley, D. Kalghatgi, G. T. Golombok, M. “Fuel Blend and Mixture Strength Effects on Autoignition Heat Release Rates and Knock Intensity in S.I. Engines” SAE Paper 962105 1995
- Bood, J. Bengtsson, P.-E. Mauss, F. Burgdorf, K. Denbratt, I “Knock in Spark-Ignition Engines: End-Gas Temperature Measurements Using Rotational CARS and Detailed Kinetic Calculations of the Autoignition Process” SAE Paper 971669 1999
- Chun, K. M. Kim, K. W. “Measurement and Analysis of Knock in a SI Engine Using the Cylinder Pressure and Block Vibration Signals” SAE Paper 940146 , SAE Trans. Journal of Engines 1994