A fast response sensor for measuring carbon dioxide concentration has been developed for laboratory research and tested on a spark ignition engine. The sensor uses the well known infra-red absorption technique with a miniaturized detection system and short capillary sampling tubes, giving a time constant of approximately 5 milliseconds; this is sufficiently fast to observe changes in CO2 levels on a cycle-by-cycle basis under normal operating conditions. The sensor is easily located in the exhaust system and operates continuously.The sensor was tested on a standard production four cylinder spark-ignition engine to observe changes in CO2 concentration in exhaust gas under steady state and transient operating conditions. The processed sensor signal was compared to a standard air-to-fuel ratio (AFR) sensor in the exhaust stream and the results are presented here. The high frequency response CO2 measurements give new insights into both engine and catalyst transient operation.


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    Titel :

    Fast Response CO2 Sensor for Automotive Exhaust Gas Analysis


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Sutela, Cory (Autor:in) / Collings, Nick (Autor:in) / Hands, Tim (Autor:in)

    Kongress:

    International Fuels & Lubricants Meeting & Exposition ; 1999



    Erscheinungsdatum :

    1999-10-25




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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