Exhaust purification device and an exhaust purification...

Details Exhaust purification device and an exhaust purification... Exhaust purification device and an exhaust purification...

2006-02-09

2009-11-10

Tran, Binh Q (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S296000, C060S305000, C060S312000

Reexamination Certificate

active

07614221

ABSTRACT:
An exhaust system for an internal combustion engine includes a catalytic device within an exhaust path of the engine, wherein the catalytic device includes a housing with a catalyst carrier. A length of the catalyst carrier along a longitudinal axis, measured along a downstream flow direction of exhaust gas within the exhaust path, is substantially the same or a shorter than the upstream distance traveled by a reverse flow of exhaust gas during an exhaust gas pulsation within the housing. With this type of configuration, due to reciprocating movements of the exhaust gas caused by the pulsations, the same exhaust gas passes through the catalyst carrier multiple times. Thus, an increased number of heat exchanges take place within the catalyst carrier, which rapidly increases the catalyst temperature after a cold engine start.

REFERENCES:
patent: 6334306 (2002-01-01), Mori et al.
patent: 6397586 (2002-06-01), Sakurai et al.
patent: 2001/0010804 (2001-08-01), Majima
patent: 5-026081 (1993-02-01), None
patent: 9-273417 (1997-10-01), None
patent: 2001-173437 (2001-06-01), None

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