title: Toward in-cylinder absorption tomography in a production engine.
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.
authors.affiliation: School of Electrical and Electronic Engineering, University of Manchester, Manchester M60 1QD, UK.
authors.forename: Paul
authors.initials: P
authors.lastname: Wright
authors.forename: Charles A
authors.initials: CA
authors.lastname: Garcia-Stewart
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Carey
authors.forename: Francis P
authors.initials: FP
authors.lastname: Hindle
authors.forename: Stephen H
authors.initials: SH
authors.lastname: Pegrum
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Colbourne
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Turner
authors.forename: William J
authors.initials: WJ
authors.lastname: Hurr
authors.forename: Tim J
authors.initials: TJ
authors.lastname: Litt
authors.forename: Stuart C
authors.initials: SC
authors.lastname: Murray
authors.forename: Sam D
authors.initials: SD
authors.lastname: Crossley
authors.forename: Krikor B
authors.initials: KB
authors.lastname: Ozanyan
authors.forename: Hugh
authors.initials: H
authors.lastname: McCann