This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of Burn Rate Parameters on Nitric Oxide Emissions for a Spark Ignition Engine: Results from a Three-Zone, Thermodynamic Simulation
Technical Paper
2003-01-0720
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A thermodynamic engine cycle simulation which includes three zones for the combustion process was used to study the effects of burn rate parameters on nitric oxide (NO) emissions for an automotive, spark-ignition engine. For the combustion process, the engine cycle simulation includes unburned and burned zones. The burned zone is further divided into an adiabatic core zone surrounded by a boundary layer zone. The importance of the adiabatic zone gas temperature for computing nitric oxide emissions is noted. The combustion process was modeled using the well-known Wiebe function to express the mass fraction burned. The effects of varying the Wiebe function parameters on engine performance, and on instantaneous and net final nitric oxide emissions were determined. For the range of Wiebe function parameters investigated, nitric oxide concentrations increased by up to about 25%. The changes of the nitric oxide concentrations were explained in terms of adiabatic zone gas temperatures, and cylinder pressures. The implications of these results to actual engines are described.
Recommended Content
| Book | Introduction to Internal Combustion Engines, Third Edition |
Authors
Citation
Caton, J., "Effects of Burn Rate Parameters on Nitric Oxide Emissions for a Spark Ignition Engine: Results from a Three-Zone, Thermodynamic Simulation," SAE Technical Paper 2003-01-0720, 2003, https://doi.org/10.4271/2003-01-0720.Also In
References
- Chun K. M. Heywood J. B. “Estimating Heat-Release and Mass-of-Mixture Burned from Spark-Ignition Engine Pressure Data,” Combustion Science and Technology Vol. 54 133 143 1987
- Caton J. A. “The Effect of Burn Rate Parameters on the Operating Attributes of a Spark-Ignition Engine as Determined from the Second Law of Thermodynamics,” Fuel Injection, Combustion, and Engine Emissions Vol. 2 proceedings of the 2000 Spring Technical Conference Wong V. W. 34-2 49 62 ASME Internal Combustion Engine Division, American Society of Mechanical Engineers San Antonio, TX 09-12 April 2000
- Baulch D. L. Drysdale D. D. Horne D. G. Lloyd A. C. “Evaluated Kinetic Data for High Temperature Reactions, Vol. 2 - Homogeneous Gas Phase Reactions of the H2-N2-O2 System,” Butterworths & Co. (Publishers) Ltd. London 1973
- Hanson R. K. Salimian S. “Survey of Rate Constants in the N/H/O System,” Combustion Chemistry Gardiner, W. C. Jr. 361 422 Springer-Verlag New York 1984
- Miller J. A. Bowman C. T. “Mechanism and Modeling of Nitrogen Chemistry in Combustion,” Progress in Energy and Combustion Science 15 287 338 1989
- Dean A. M. Bozzelli J. W. “Combustion Chemistry of Nitrogen,” Gas-Phase Combustion Chemistry Gardiner, W. C. Jr. 125 342 Springer-Verlag New York 2000
- Lavoie G. A. Heywood J. B. Keck J. C. “Experimental and Theoretical Study of Nitric Oxide Formation in Internal Combustion Engines,” Combustion and Science Technology 1 313 338 1970
- Heywood J. B. Internal Combustion Engine Fundamentals McGraw-Hill Book Company New York, New York 1988
- Heywood J. B. Higgins J. M. Watts P. A. Tabaczynski R. J. “Development and Use of a Cycle Simulation to Predict SI Engine Efficiency and NOx Emissions,” Society of Automotive Engineers, SAE Paper no. 790291 1979
- Caton J. A. “A Multiple-Zone Cycle Simulation for Spark-Ignition Engines: Thermodynamic Details,” Large-Bore Engines, Fuel Effects, Homogeneous Charge Compression Ignition, Engine Performance and Simulation Vol. 2 ICE-Vol. 37-2 proceedings of the 2001 Fall Technical Conference Wong V. W. ASME Internal Combustion Engine Division, American Society of Mechanical Engineers, paper no. 2001-ICE-412 41 58 Argonne, IL 23-26 September 2001
- Caton J. A. “Detailed Results for Nitric Oxide Emissions as Determined from a Multiple-Zone Cycle Simulation for a Spark-Ignition Engine,” Design, Application, Performance and Emissions of Modern Internal Combustion Engine Systems and Components 39 proceedings of the 2002 Fall Technical Conference Wong V. W. ASME Internal Combustion Engine Division, American Society of Mechanical Engineers, paper no. ICEF-2002-491 131 148 New Orleans, LA 08-11 September 2002
- Caton J. A. “Extension of a Thermodynamic Cycle Simulation to Include Computations of Nitric Oxide Emissions for Spark-Ignition Engines,” Report No. ERL-2002-01, Version 1.0 Engine Research Laboratory, Department of Mechanical Engineering, Texas A&M University 22 July 2002
- Wiebe J. J. “Brennverlauf und Kreisprozess von Verbren-nungsmotoren,” VEB-Verlag Technik Berlin 1970
- Woschni G. “A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine,” SAE Transactions, SAE paper no. 670931 76 3065 3083 1968
- Sherman R. H. Blumberg P. N. “The Influence of Induction and Exhaust Processes on Emissions and Fuel Consumption in the Spark Ignited Engine,” SAE Paper no. 770990 1977