1980-02-01

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.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

The Role of Zirconium in Novel Three-Way Catalysts

970465

View Details

TECHNICAL PAPER

Development of High Performance Three-Way-Catalyst

2006-01-1061

View Details

TECHNICAL PAPER

Application of Advanced Three-Way Catalyst Technologies on High Cell Density Ultra Thin-Wall Ceramic Substrates for Future Emission Legislations

2001-01-0924

View Details

X