The characteristics of ZrO2-type oxygen sensors for closed-loop control of the air-fuel mixture for automotive engines were investigated. New sensors, sensors tested in dynamometers and road vehicles, and lead-poisoned sensors were characterized as to their performance in terms of voltage output, switching response, internal resistance and voltage-λ switching behavior. New sensors behaved as ideal sensors at temperatures above 400°C, and behaved non-ideally at temperatures below 350°C. Sensors subjected to dynamometer and vehicle tests showed a gradual degradation in output voltage and steepness of their voltage-λ switch. Their internal resistances and lean-to-rich switching times increased with use while the rich-to-lean switching times decreased. Self-recovery of a sensor from lead poisoning occurred during subsequent vehicle operation with lead-free fuel.


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    Titel :

    Characteristics of ZrO2-Type Oxygen Sensors for Automotive Applications


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Young, C. T. (Autor:in) / Bode, J. D. (Autor:in)

    Kongress:

    1979 Automotive Engineering Congress and Exposition ; 1979



    Erscheinungsdatum :

    01.02.1979




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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