On board measurement of carbon dioxide exhaust car emissions using a mid-infrared optical based fibre

This paper describes the investigation of an optical sensor system for the online measurement of carbon dioxide emissions in the exhaust system of a motor vehicle. Current anti-pollution technology installed in motor vehicles fail to meet monitoring requirements as specified by the European Commission. A robust sensor design and construction have made it suitable for installation on the exhaust of a motor vehicle. Results are presented for the sensor output when calibrated to carbon dioxide supplied from a cylinder at the Centro Ricerche Fiat (CRF) research laboratory initially and in-situ in the exhaust of a Fiat Croma (diesel engine) during full scale tests on a roller test bench also at CRF.