Catalytic converter with metallic carrier and method for produci

Details Catalytic converter with metallic carrier and method for produci Catalytic converter with metallic carrier and method for produci

1991-02-08

1992-03-10

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

29890, 60299, 422174, 422180, 502527, F01N 328, B21D 4700

Patent

active

050940740

ABSTRACT:
A catalytic converter for purifying exhaust gas from an automotive vehicle engine. The catalytic converter is composed of a metallic carrier for catalyst metal, disposed inside a casing. The metallic carrier is constructed of a main sheet metal structure which is formed by turning up an elongate flat sheet metal in a zigzag manner in cross-section, so that the main sheet metal structure has a plurality of parallel flat portions. The adjacent flat portions define therebetween a space. The main sheet metal structure is coated over all of its surfaces with an electrically insulative alumina layer. A plurality of corrugated sheet metal spacers are disposed and secured in the respective spaces thereby to define fine gas passages through which exhaust gas flows. Thus, the main sheet metal structure is electrically insulated from the corrugated sheet metal spacers, so that electric current is passed only through the main sheet metal structure. The main sheet metal structure serves as a heater element for promoting activation of the catalyst metal.

REFERENCES:
patent: 3770389 (1973-10-01), Kitzner et al.
patent: 4619912 (1986-10-01), Jalbing
patent: 4782570 (1988-11-01), Spridco
patent: 4976929 (1990-12-01), Cornelison

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