This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Performance and NOx Emissions Modeling of a Jet Ignition Prechamber Stratified Charge Engine
Annotation ability available
Sector:
Language:
English
Abstract
The development of a cycle simulation model for the jet ignition prechamber stratified charge engine is described. Given the engine geometry, load, speed, air-fuel ratios and pressures and temperatures in the two intakes, flow ratio and a suitable combustion model, the cycle simulation predicts engine indicated efficiency and NO emissions. The relative importance of the parameters required to define the combustion model are then determined, and values for ignition delay and burn angle are obtained by matching predicted and measured pressure-time curves. The variation in combustion parameters with engine operating variables is then examined. Predicted and measured NO emissions are compared, and found to be in reasonable agreement over a wide range of engine operation. The relative contribution of the prechamber NO to total exhaust NO is then examined, and in the absence of EGR, found to be the major source of NO for overall air-fuel ratios leaner than 22:1.
Recommended Content
Authors
Topic
Citation
Hires, S., Ekchian, A., Heywood, J., Tabaczynski, R. et al., "Performance and NOx Emissions Modeling of a Jet Ignition Prechamber Stratified Charge Engine," SAE Technical Paper 760161, 1976, https://doi.org/10.4271/760161.Also In
References
- Turkish M.C. “3-Valve Stratified Charge Engines: Evolvement, Analysis and Progression,” Paper 741163 International Stratified Charge Engine Conference Troy, Michigan October 30 November 1 1974
- Date T. Yagi S. Ishizuya A. Fujii I. “Research and Development of the Honda CVCC Engine,” Paper 740605 West Coast Meeting Anaheim, California August 12-16 1974
- Johnson P.R. Genslak S.L. Nicholson R.C. “Vehicle Emission Systems Utilizing a Stratified Charge Engine,” Paper 741157 International Stratified Charge Engine Conference Troy, Michigan October 30 November 1 1974
- Purins E. “Pre-Chamber Stratified Charge Engine Combustion Studies,” Paper 741159 International Stratified Charge Engine Conference October 30 November 1 1974
- Saki Y. Kunii K. Tsutsumi S. Nakagawa Y. “Combustion Characteristics of the Torch Ignited Engine,” Paper 741167 International Stratified Charge Engine Conference Troy, Michigan October 30 November 1 1974
- Davis G.C. Krieger R.B. Tabaczynski R.J. “Analysis of the Flow and Combustion Processes of a Three-Valve Stratified Charge Engine with a Small Prechamber,” Paper 741170 International Stratified Charge Engine Conference Troy, Michigan October 30 November 1 1974
- Woschni G. “A Universally Applicable Equation for Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine,” SAE Transactions 76 1967 Paper 670931
- Blumberg P. Kummer J.K. “Prediction of NO Formation in Spark-Ignition Engines--An Analysis of Methods of Control,” Combustion Sci. & Tech. 4 1971 73
- Komiyama K. Heywood J.B. “Predicting NO x Emissions and Effects of Exhaust Gas Recirculation in Spark-Ignition Engines,” SAE Transactions 82 1973 Paper 730475
- Brandstetter W. “Single Cylinder Stratified Charge Engine Combustion Movie,” Color movie shown at Workshop on Internal Combustion Engine Simulation La Jolla, California 23-25 April 1965 Volkswagenwerk 1975
- Ekchian A. “Time Resolved Measurements on the Exhaust of a Jet Ignition Prechamber SI Engine,” M.I.T. Department of Mechanical Engineering February 1976
- Martin M. K. “Photographic Study of Stratified Combustion Using a Rapid Compression Machine,” M.I.T. Department of Mechanical Engineering January 1975
- Hires S.D. “Performance and Emission Modelling of a Jet Ignition Stratified Charge Engine,” M.I.T. Department of Mechanical Engineering January 1975
- Baulch D.L. Drysdale D.D. Horne D.G. Lloyd A.C. Evaluated Kinetic Data for High Temperature Reactions 2 Butterworth & Co., Ltd. London 1973
- Lancaster D.R. Krieger R.B. Kienesch J.H. “Measurement and Analysis of Engine Pressure Data,” SAE Paper 750026 February 1975
- Spindt R.S. “Air-Fuel Ratio From Exhaust Gas Analysis,” SAE Transactions 74 1965 Paper 640507
- Huls T.A. Nickol H.A. “Influence of engine Variables on Exhaust Oxides of Nitrogen Concentrations from a Multi-Cylinder Engine,” SAE Paper 670482 1967
- JANAF Thermochemical Tables National Bureau of Standards Publication 1971