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Optical Multiwavelength Technique Applied to the Online Measurement of Particle Emissions from Engines
Technical Paper
2001-24-0074
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The importance of obtaining simultaneous particle size and concentration values has grown up with continuing discussion of the health effects, of internal combustion engine generated particulate emissions and in particular of Diesel soot emissions. In the present work an aerosol measurement system is described that delivers information about particle size and concentration directly from the undiluted exhaust gas.
Using three laser diodes of different wavelengths which form one parallel light beam, each spectral attenuation is analysed by a single detector and the particle diameter and concentration is evaluated by the use of the Mie theory and shown on-line at a frequency of 1 Hz. The system includes an optical long-path-cell (White principle) with an adjustable path length from 2.5 to 15 m, which allows the analysis within a broad concentration range.
On-line measurements of the particulate emissions in the hot, undiluted exhaust of Diesel engines are presented under stationary and transient engine’s load conditions. Mean particle diameters well below 100 nm are detected for modern Diesel engines. The measured particle concentration corresponds excellently with the traditional gravimetrical measurements of the diluted exhaust. Additionally, measurements of particle emissions (mostly condensed hydricarbons) from a two-stroke engine are presented and discussed.
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Authors
- R.A. Zahoransky - Fachhochschule Offenburg, Badstr. 24, 77652 Offenburg, Germany
- T. Saier - Fachhochschule Offenburg, Badstr. 24, 77652 Offenburg, Germany
- E. Laile
- M. Nikitidis - Aerosol & Particle Technology Laboratory, CERTH/CPERI, PO Box 361, 57001 Thermi, Thessaloniki, Greece
- A. G. Konstandopoulos - Aerosol & Particle Technology Laboratory, CERTH/CPERI, PO Box 361, 57001 Thermi, Thessaloniki, Greece
Topic
Citation
Zahoransky, R., Saier, T., Laile, E., Nikitidis, M. et al., "Optical Multiwavelength Technique Applied to the Online Measurement of Particle Emissions from Engines," SAE Technical Paper 2001-24-0074, 2001, https://doi.org/10.4271/2001-24-0074.Also In
References
- Pfeifer, U. Zarske, S. Samenfink, W. Dittmann, R. Laile, E. Zahoransky R. Optisches Multiwellenlängen-Extinktionsverfahren - angewandt zur on-line Messung der Größe und Volumenkonzentration von Partikeln im Abgas von Dieselmotoren; In VDI Bericht 1189 1995
- Zahoransky, R. Kuhnt, W. Laile; E. In-line Particle Measurements of the Undiluted Exhaust of Combustion Engines by Multi-Wavelength Extinction Technique J. Aerosol Sci 28 Suppl. 1 1997
- Zahoransky R.A. Kuhnt H.W. Laile E. Poss G. Particle Emission of Internal Combustion Engines under Transient Load Conditions - on-line Analysis of Particle Size and Concentration by Optical Extinction J. Aerosol Sci 29 Suppl. 1 1998
- Nikitidis M. S. Konstandopoulos A. G. Zahoransky R. Laile E. Correlation of Measurements of a New Long Optical Path Length Particle Sensor against Gravimetric and Electrical Mobility based Particle Measurements in Diesel Exhaust Submitted to the 5th International Conference of Internal Combustion Engine Capri Sep. 23–27 2001