Browse Publications Technical Papers 2006-01-3315
2006-10-16

A New Approach for Three-Dimensional High-Speed Combustion Diagnostics in Internal Combustion Engines 2006-01-3315

This paper introduces a new measuring and analyzing method for the investigation of the spatial flame propagation in IC engines. Three optical high-speed measuring devices are connected and synchronized in order to detect the flame radiation from different perspectives via fiberoptical endoscopes. The resulting two-dimensional images provide a starting basis for the subsequent reconstruction of the three-dimensional flame geometry. The reconstruction is carried out by a newly developed software tool. The capability of the new methodology has been proven in a first test series. A one-cylinder SI engine with direct-injection is operated in both homogeneous and spray-guided stratified injection mode. Intake flow conditions and air/fuel ratio are varied in order to investigate the effects on flame spread. The volumetric flame developments are analyzed as well as the location of the combustion center in absolute coordinates.

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