Electrically heated catalyst achieving smaller power consumption

Details Electrically heated catalyst achieving smaller power consumption Electrically heated catalyst achieving smaller power consumption

1996-04-15

1998-09-01

Tran, Hien

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422180, 422199, 422222, 60300, 219541, 219552, 392485, 55DIG30, F01N 310

Patent

active

058007890

ABSTRACT:
An electrically heated catalyst installed in an exhaust pipe of an internal combustion engine, featuring simple construction, without causing the flow resistance of the exhaust gases to increase, and consuming small amounts of electric power. The electrically heated catalyst has two electrodes of different polarities in a casing through which the exhaust gases flow and has at least one catalyst support that is folded plural times in a zig-zag manner in a direction intersecting the direction of flow of the exhaust gases without coming into contact with itself, the two ends of the catalyst support being connected to these two electrodes. The catalyst support is constituted by a flat foil and a corrugated foil that are joined together, and electric insulators are provided at the folding portions of the catalyst support to stretch and support the catalyst support inside the casing. Owing to the insulators, the catalyst support is held in the casing in a state of receiving tension. By using the thus constituted electrically heated catalyst, the regular catalytic converter on the downstream side of the electrically heated catalyst is heated while consuming small amounts of electric power and maintaining a small flow resistance to the exhaust gases.

REFERENCES:
patent: 4976929 (1990-12-01), Cornelison et al.
patent: 5094074 (1992-03-01), Nishizawa et al.
patent: 5229080 (1993-07-01), Abe et al.
SAE Technical Paper Series 940465 "Ultra-Low Power Electrically-Heated Catalyst System", Feb. 28-Mar. 3, 1994.

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