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Combustion Imaging and Analysis in a Gasoline Direct Injection Engine
Technical Paper
2004-01-0045
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A single cylinder Direct Injection Spark Ignition (DISI) engine with optical access has been used for combustion studies with both early injection and late injection for stratified charge operation. Cylinder pressure records have been used for combustion analysis that has been synchronised with the imaging. A high speed cine camera has been used for imaging combustion within a cycle, while a CCD camera has been used for imaging at fixed crank angles, so as to obtain information on cycle-by-cycle variations. The CCD images have also been analysed to give information on the quantity of soot present during combustion.
Tests have been conducted with a reference unleaded gasoline (ULG), and pure fuel components: iso-octane (a representative alkane), and toluene (a representative aromatic). The results show diffusion-controlled combustion occurring in so-called homogeneous combustion with early injection. The CCD images show substantial cycle-by-cycle variations in combustion, especially in terms of the incandescent soot. The chromatic information in the CCD images has been analysed, so as to obtain estimates of the temperature at different crank angles.
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Wyszynnski, L., Aboagye, R., Stone, R., and Kalghatgi, G., "Combustion Imaging and Analysis in a Gasoline Direct Injection Engine," SAE Technical Paper 2004-01-0045, 2004, https://doi.org/10.4271/2004-01-0045.Also In
References
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- Wyszynski Lukasz P Stone C Richard Kalghatgi Gautam T ‘The Volumetric Efficiency of Direct and Port Injection Gasoline Engines with Different Fuels’ SAE Paper 2002-01-0839 2002