Mazda Motor Corporation

Tokyo Roki Co., Ltd.

Shigeru Yasaki

Yasutaka Yoshino

Kazunori Ihara

Kazunori Ihara, Deceased

Kenji Ohkubo

An exhaust gas purifying catalyst for use in an internal combustion engine includes a porous monolithic carrier, a catalyst coating layer formed on a surface of the monolithic carrier and containing a catalytic material capable of purifying exhaust gases, and a palladium-supporting layer formed in the catalyst coating layer at a location close to an exhaust gas inlet end of the monolithic carrier. Palladium is distributed at a high concentration in the palladium-supporting layer.

Exhaust gas purifying catalyst for use in an internal combustion engine

Exhaust purifying catalyst for use in an internal combustion engine and

In a method of manufacturing an exhaust gas purifying catalyst, a carrier of heat-resistant alloy steel containing aluminum is initially prepared as a metallic carrier. A first alumina slurry containing fine particles of hydrated alumina and water is then coated on the surface of the metallic carrier and is in turn dried and calcined so that a first alumina layer may be formed on the surface of the metallic carrier. Thereafter, a second alumina slurry containing gamma-alumina particles, hydrated alumina and water is coated on the surface of the first alumina layer and is in turn dried and calcined so that a second alumina layer may be formed on the surface of the first alumina layer.

Method of manufacturing an exhaust gas purifying catalyst

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Tokyo, Japan

Shigeru Yasaki