Exhaust apparatus for engine

Details Exhaust apparatus for engine Exhaust apparatus for engine

1996-10-22

1999-03-30

Argenbright, Tony M.

Power plants

Internal combustion engine with treatment or handling of...

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

60308, 181262, F01N 334

Patent

active

058874240

ABSTRACT:
An exhaust apparatus for an engine is provided, which is capable of efficiently sucking in secondary air for a catalyst by utilizing an ejector (entraining) effect caused by the exhaust gases and which has a simple and inexpensive structure. Exhaust gases from the engine are introduced into a main muffler body, are expanded and muffled by passage through a plurality of silencer chambers, and are also passed through a catalyst and scrubbed thereby in a state in which they are mixed with secondary air introduced from the exterior. A secondary air introduction pipe for introducing secondary air is provided in a first-stage silencer chamber. A mixing pipe is provided into which are introduced the secondary air introduced from the secondary air introduction pipe and the exhaust gases from the first-stage silencer chamber. An ejector (entraining) portion for sucking in the secondary air from the secondary air introduction pipe is formed from an outlet of the secondary air introduction pipe and an inlet of the mixing pipe.

REFERENCES:
patent: 3741730 (1973-06-01), Alcott
patent: 3899303 (1975-08-01), Gaysert
patent: 4094645 (1978-06-01), Bailey
patent: 4209493 (1980-06-01), Olson
patent: 5431013 (1995-07-01), Yamaki et al.
patent: 5548955 (1996-08-01), Sandefur et al.
patent: 5590522 (1997-01-01), Kynsilehto et al.

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