Toward in-cylinder absorption tomography in a production engine |
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| Authors: | Wright Paul Garcia-Stewart Charles A Carey Stephen J Hindle Francis P Pegrum Stephen H Colbourne Stephen M Turner Paul J Hurr William J Litt Tim J Murray Stuart C Crossley Sam D Ozanyan Krikor B McCann Hugh |
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| Affiliation: | School of Electrical and Electronic Engineering, University of Manchester, Manchester M60 1QD, UK. |
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| Abstract: | Design requirements for an 8000 frame/s dual-wavelength ratiometric chemical species tomography system, intended for hydrocarbon vapor imaging in one cylinder of a standard automobile engine, are examined. The design process is guided by spectroscopic measurements on iso-octane and by comprehensive results from laboratory phantoms and research engines, including results on temporal resolution performance. Novel image reconstruction techniques, necessary for this application, are presented. Recent progress toward implementation, including details of the optical access arrangement employed and signal-to-noise issues, is described. We present first cross-cylinder IR absorption measurements from a reduced channel-count (nontomographic) system and discuss the prospects for imaging. |
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