This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Tomographic Camera System for Combustion Diagnostics in SI Engines
Annotation ability available
Sector:
Language:
English
Abstract
In order to facilitate the analysis of SI engine combustion phenomena, we have developed a fiber optic system which allows the observation of combustion in essentially standard engines. Optical access to the combustion chamber is achieved with micro-optic elements and optical fibers in the cylinder head gasket. Each fiber views a narrow cone of the combustion chamber and transmits the light seen within this acceptance cone to the detector and recorder unit.
A large number of such fiber optic detectors have been incorporated in a cylinder head gasket and this multichannel system was arranged in a geometric configuration which allowed the reconstruction of the spatial flame intensity distribution within the observed combustion chamber cross-section. The spatial information was gained from the line-of-sight intensity signals by means of a tomographic reconstruction technique.
As the spatial flame distribution is derived from intensity signals which are recorded with high time resolution, the temporal development of the flame can be reconstructed from consecutive data records and is presented in computer animated video films.
The paper presents the concept of this tomographic camera system and gives an assessment of its spatial and temporal capabilities. The applicability of the camera system for the study of various combustion phenomena is evaluated with examples covering, among others, combustion phenomena such as early flame propagation and auto-ignition.
Recommended Content
Technical Paper | Combustion Observation of OSKA-DH Diesel Engine by High-Speed Photography and Video System |
Technical Paper | Combustion in Spark Ignition Engines with Direct Injection |
Authors
Topic
Citation
Philipp, H., Plimon, A., Fernitz, G., Hirsch, A. et al., "A Tomographic Camera System for Combustion Diagnostics in SI Engines," SAE Technical Paper 950681, 1995, https://doi.org/10.4271/950681.Also In
References
- Witze, P.O. Green, R.M. „Determining the location of end-gas autoignition using ionization probes installed in the head gasket” SAE 932645
- Winklhofer, E. Philipp, H. Fraidl, G. Fuchs, H. „Fuel and flame imaging in SI engines” SAE 930871
- Witze, P.O. „Techniques for detecting flame arrival in premixed-charge spark ignition engines” Durao D.F.G. et al. Combusting Flow Diagnostics 481 493 Kluwer 1992
- Spicher, U. Kröger, H. Ganser, J. „Detection of knocking combustion using simultaneously high speed Schlieren cinematography and multi optical fiber technique” SAE 912312
- Müller, K. Lindner, E. Maurer H. 393 687 July 19 1993
- Radon, J. 69 292 1917
- Herman, G.T. „Image reconstruction from projections” Academic Press London 1980
- Philipp, H.A. 1991
- Winklhofer, E. Fuchs, H. Fraidl, G.K. „Optical research engines - tools in gasoline engine development?” I.Mech.E. Seminar on Measurement and Observation Analysis of Combustion in Engines London 22 March 1994
- Yang, J. Plee, S.L. Remboski, D.J. Martin, J.K. „Comparison between measured radiance and a radiation model in a spark-ignition engine” Transactions of the ASME 331 334 112 July 1990
- Gschweitl, K. Gotthard, E. Kampitsch, A. „Realtime knock analysis for automatic engine mapping and calibration” SAE 942399
- Grosch, P. Ludwig, J. 55 62 67 1994