In-Cylinder Diagnostics for Production Spark Ignition Engines

Witze, Peter O.

doi:10.1007/978-94-009-1620-3_15

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…perturbing fluorescence techniques. Likewise, flameluminosity measurements, 15 such as those frequently used for concentration and temperature investigations, will be affected.…”

Section: Discussionmentioning

confidence: 99%

Investigation of spatially resolved light absorption in a spark-ignition engine fueled with propane/air

Hildenbrand¹,

Schulz²,

Wagner³

et al. 1999

Appl. Opt.

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UV absorption in the combustion phase of spark-ignition engines strongly influences laser-induced-fluorescence measurements and flame-emission techniques because of the attenuation of a laser and/or signal light. This absorption was assessed with spatial, spectral, and temporal resolutions in an optically accessible research engine. Absorption was measured along a line for different crank-angle positions throughout the combustion phase of the engine by use of spectrally resolved transmittance measurements of both broadband illumination from a deuterium lamp and emission of laser-excited hot oxygen. Evaluating the spatial patterns of absorptivity revealed that no increased absorption can be attributed to the flame-front region and that homogeneous absorption cross sections for the whole burned-gas region can be assumed. The temporal change of absorption was shown to depend on the pressure effect with only negligible changes in absorption cross sections. Results obtained from the absorption measurements are applied for spatially resolved corrections of two-dimensional laser-induced-fluorescence measurements of NO concentration fields obtained under different operating conditions.

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“…perturbing fluorescence techniques. Likewise, flameluminosity measurements, 15 such as those frequently used for concentration and temperature investigations, will be affected.…”

Section: Discussionmentioning

confidence: 99%