Application of Exhaust- Gas- Oxygen Sensors to the Study of Storage Effects in Automotive Three-Way Catalysts 800019
The time-average conversion efficiencies of an automotive three-way catalyst subjected to exhaust flows for which A/F is modulated around stoichiometry are benefited by the ability of the catalyst to store oxidizing and reducing chemical species. A V-8 engine equipped with a vapor carburetor and exhaust system containing zirconia exhaust-gas-oxygen sensors before and after a three-way catalyst have been used to study the response of the catalyst to fast changes in exhaust A/F ratio. With this experimental arrangement, qualitative and quantitative observations of storage of oxidizing and reducing chemical species on Engelhard Industries TWC-19D3 catalysts have been made. The quantitative value for the oxygen storage capacity obtained for full-sized catalysts in real exhaust gas compares favorably with the value measured using a laboratory mass-spectrometer technique with small catalyst samples and synthesized exhaust gases.
Citation: Meitzler, A., "Application of Exhaust- Gas- Oxygen Sensors to the Study of Storage Effects in Automotive Three-Way Catalysts," SAE Technical Paper 800019, 1980, https://doi.org/10.4271/800019. Download Citation
Author(s):
Allen H. Meitzler
Pages: 12
Event:
1980 Automotive Engineering Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Sensors for Automotive Systems-SP-0458
Related Topics:
Three-way catalysts
Catalysts
Exhaust systems
Storage
Chemicals
Oxygen
Gases
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