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The Effect of Engine Variables on Hydrocarbon Emissions - An Investigation with Statistical Experiment Design and Fast Response FID Measurements
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English
Abstract
This paper describes an investigation of emissions from an engine featuring variable valve timing, a swirlcontrol valve and exhaust gas recirculation.
Design of experiments has been used to model the response of hydrocarbons and other emissions to the engine operating variables. The experiments identified the potential of VVT for simultaneous NOx, and HC reduction.
The type of experiment employed was the Central Composite Rotatable Design; this is a fractional factorial design that maximises the amount of information obtained from a minimal number of test runs.
A Fast Response Flame Ionisation Detector has been used to clarify the reasons for the effect of inlet and exhaust VVT on hydrocarbons.
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Citation
Seabrook, J., Nightingale, C., and Richardson, S., "The Effect of Engine Variables on Hydrocarbon Emissions - An Investigation with Statistical Experiment Design and Fast Response FID Measurements," SAE Technical Paper 961951, 1996, https://doi.org/10.4271/961951.Also In
Emissions Formation and In-Cylinder Control of Emissions in SI Engines
Number: SP-1268; Published: 1996-10-01
Number: SP-1268; Published: 1996-10-01
Outcome of the European Programme on Emissions, Fuels and Engine Technologies (Epefe)
Number: SP-1204; Published: 1996-10-01
Number: SP-1204; Published: 1996-10-01
References
- Fisher, R A The Design of Experiments Oliver and Boyd Edinburgh 1935
- Yates, F “Complex Experiments” Journal Royal Statistical Society 2 181 247 England 1935
- Finney, D J “The Fractional Replication of Factorial Arrangements” Annals of Eugenics 12 London 1945
- Box, G E P Wilson K B “On the Experimental Attainment of Optimal Conditions” Journal of the Royal Statistical Society 13 1 England 1951
- Taguchi, G System of Experimental Design, Volume I UNIPUB/Kraus International Publications New York 1987
- Pilley, A D Beaumont A J Robinson D Mowll D “Design of Experiments for Optimization of Engines to Meet Future Emissions Targets” International Symposium on Advanced Transportation Applications 1994
- Clerk, D 1880
- Ahmad, T Theobald M A “A Survey of Variable-Valve-Actuation Technology” SAE 891674
- Dresner, T Barkin P “A Review and Classification of Variable Valve Timing Mechanisms” SAE 890674
- Gray, C “A Review of Variable Engine Valve Timing” SAE 880386
- Stone, R Kwan E “Variable Valve Actuation Mechanisms and the Potential for their Application” SAE 890673
- Leone, T G Christenson E J Stein R A “Comparison of Variable Camshaft Timing Strategies at Part Load” SAE 960584
- Norris, R D “A High Speed Variable Valve Timing Mechanism for Engines” Autotech Congress, Proc. IMechE 1991
- John, P W M Statistical Design and Analysis Experiments Macmillan New York 1971
- Box, G E P Draper N R Empirical Model Building 508 515 John Wiley & Sons New York 1987
- Fox, J W Cheng W K Heywood J B 1993 “A model for predicting residual gas fraction in spark-ignition engines” SAE 931025
- Tabaczynski, R J Heywood J B Keck J C “Time-resolved measurements of hydrocarbon mass flow rate in the exhaust of a spark-ignition engine” SAE 720112
- Thompson, N D Wallace J S “Effect of Engine Operating Variables and Piston and Ring Parameters on Crevice Hydrocarbon Emissions” SAE 940480
- Fry, M D Optimization of Mixture Preparation in an SI Engine Department of Mechanical Engineering, University College London 1994