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Intake manifold burned gas backflow measurements
Published May 23, 2001 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
A fast response sensor for measuring carbon dioxide concentrations has been developed for laboratory use and tested on a spark ignition engine. The sensor utilizes the well-known infra-red absorption technique with a miniaturized detection system and a high frequency sampling system resulting in a sensor time constant of approximately 4 milliseconds - fast enough to observe CO2 concentration changes within a single event (intake or exhaust) of a normally operating engine. The sensor is simple to deploy and operates on a continuous basis. In this paper, the details of a sensor application are given: measurement of the concentration of burned gas that is vented back into the intake manifold at IVO under idle conditions.