Excellent Oxygen Storage Capacity of Perovskite-PD Three way Catalysts Daihatsu Motor Company, Limited

Format:

Conference/Event

Author/Creator:

Tanaka, Hirohisa, author.

Conference Name:

International Congress & Exposition (1995-02-27 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1995

Summary:

Increasingly stringent emissions controls have led to a greater emphasis on strategies designed to minimize emission during cold start. One strategy employed is that of close-coupling the catalyst to the exhaust manifold of the engine in an effort to minimize catalyst light-off time. In this configuration, the catalyst must exhibit a high degree of thermal stability.Further, since the catalyst is situated nearer to the engine, it is more liable to sense cylinder-to-cylinder variations in exhaust gas composition and thus needs to possess a wider operating window than a catalyst positioned further underbody.We have previously reported that Perovskite-Pd catalysts exhibit excellent heat resistance and have three-way catalyst activity comparable with or superior to that of Pt-Rh/ Al2O3 catalysts and Pd/Al2O3 catalysts [1]*.Durability at high temperatures and oxygen storage capacity under large air/fuel (A/F) ratio fluctuation conditions have now been tested.As a result, it has been found that the Perovskite-Pd catalysts exhibit satisfactory thermal resistance, good oxygen storage capacity and excellent performance.The Perovskite-Pd catalyst may be applicable to both electronically fuel injected engines and carburetor specifications engines

Notes:

Vendor supplied data

Publisher Number:

950256

Access Restriction:

Restricted for use by site license