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Optical Investigation of Auto-Ignition Process in a Small DI Diesel Engine
Technical Paper
2002-01-1162
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A optical investigation of injection, and combustion process has been performed in order to understand auto-ignition phenomena into a small 4 cylinder DI Diesel optical engine. Measurements were obtained a representatives partial load condition, corresponding to a motored TDC temperature and density of 800 K and 20 kg/m3. A better comprehension of cyclic fluctuation of auto-ignition sites was provided by a double optical diagnostics set up. Laser induced fluorescence was applied on Diesel fuel liquid phase along with synchronous natural flame imaging.
The auto-ignition process has been investigated by a new experimental set up. A spectrally resolved imaging of the first chemical reaction was performed and revealed errors induced by a pressure transducer analysis. A photomultiplier tube, sensible to the OH* radical emission's band was employed to approach the real auto-ignition delay. The primary step of auto-ignition phenomena is point out to correspond to a weak chemiluminescence emission signal which is not correlated to a significant pressure variation.
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Citation
Pajot, O., Maunoury, B., Duverger, T., Mokaddem, K. et al., "Optical Investigation of Auto-Ignition Process in a Small DI Diesel Engine," SAE Technical Paper 2002-01-1162, 2002, https://doi.org/10.4271/2002-01-1162.Also In
Compression Ignition Combustion and In-Cylinder Diesel Particulates and Nox Control
Number: SP-1698; Published: 2002-03-04
Number: SP-1698; Published: 2002-03-04
References
- Roth, R. Analyse des images de fluorescence du spray de fuel dans un moteur Diesel à injection directe Rouen University 1998
- Corcione, F.E. Mazziotti, G. Vaglieco, B.M. Two dimensional Analysis of Diesel Combustion by Spectral Flame Emissivity Measurements SAE Paper 960838
- Astarita, M. Corcione, F.E. Costa, M. Vaglieco, B.M. De Maio, A. Experimental and Numerical Investigation of Ignition in a Diesel Engine 4th ICE International Conference proceeding 339 346 1999