Ceramic ZrO2, TiO2 and related oxides with suitable O2‐sensitive electrical properties have found important applications in devices for measuring exhaust‐gas O2 concentration. For example, such devices are key components in feedback control systems that would maintain the intake air‐to‐fuel ratio near the stoichiometric value where regulated emissions can be minimized. The physical principles underlying the operation of ZrO2 based O2‐concentration cells and TiO2‐based resistive devices for the stoichiometric application are described. Finally, a device based on electrochemical O2 pumping is discussed which may be useful for A/F control in the fuel‐efficient lean region.
Exhaust gas oxygen sensors
Physics in the Automotive Industry ; 1980 ; Detroit, MI, USA
AIP Conference Proceedings ; 66 , 1 ; 140-146
01.01.1981
7 pages
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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