title: Multispecies in situ monitoring of a static internal combustion engine by near-infrared diode laser sensors.
abstract: A multispecies near-infrared diode laser spectrometer has been constructed for measurements of carbon monoxide, carbon dioxide, and methane directly in the exhaust of a static internal combustion engine. A wavelength modulation-division multiplexing scheme was implemented for the two distributed feedback diode lasers. Gas concentration variations were observed for changes in operating conditions such as increasing and decreasing the throttle, adjusting the air-fuel ratio, and engine start-up.
authors.affiliation: School of Chemical Engineering and Analytical Science, University of Manchester, Machester, UK.
authors.forename: Yvan
authors.initials: Y
authors.lastname: Gérard
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Holdsworth
authors.forename: Philip A
authors.initials: PA
authors.lastname: Martin
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry; D002248:Carbon Monoxide / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods; D005740:Gases; D005742:Gasoline; D007834:Lasers; D055095:Optics and Photonics; D013053:Spectrophotometry; D013055:Spectrophotometry, Infrared; D013997:Time Factors; D001335:Vehicle Emissions
chemical_list: D005740:Gases; D005742:Gasoline; D001335:Vehicle Emissions; D002245:Carbon Dioxide; D002248:Carbon Monoxide