This paper describes the design and operation of the multi-layered zirconia heated exhaust gas oxygen sensor having small-sized and sheet-shaped sensing element.This sensor uses an electrode modified with a rhodium catalyst and heater by means of the thick-film technique. This modification of an electrode's composition and construction affects the reaction on unburned components in exhaust gas as well as the sensor performance.By the addition of a rhodium catalyst, the zirconia exhaust gas oxygen sensor shows acute sensitivity and faster response properties in the transient state on emission component(NOx) generation, in such a way that these sensors show better emission control properties for reduction of NOx emission in current emission control systems.The addition of a rhodium catalyst reduces the green effect of sensor properties, and no significant change of emission control properties is observed after 50,000 equivalent miles using the engine dynamometer durability test.
Multi Layered Zirconia Oxygen Sensor with Modified Rhodium Catalyst Electrode
Sae Technical Papers
SAE International Congress and Exposition ; 1988
1988-02-01
Conference paper
English
Multi layered zirkonia oxygen sensor with modified rhodium catalyst electrode
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