Heated Zirconia Exhaust Gas Oxygen Sensor Having a Sheet-Shaped Sensing Element 850382

This paper describes the design and property of an electrically heated zirconia exhaust gas oxygen sensor having small-sized and sheet-shaped sensing element.
Sensing element and sensor have been miniaturized by monolithic formation of sensing element and heater by means of thick-film techniques.
The difference in response property according to the angle of the electrode to exhaust gas flow because of the sheet-shaped configuration of sensing element was minimized by proper design of protective cover.
Similarity in λ control property and limit cycle frequency was demonstrated with heated zirconia oxygen sensor having test tube-shaped sensing element by engine dynamometer durability test over 120,000 equivalent miles.


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