Secondary air supply device

Details Secondary air supply device Secondary air supply device

1979-09-06

1982-03-16

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

13751215, F01N 310

Patent

active

043194524

ABSTRACT:
A secondary air supply device including a reed valve arranged in a secondary air passage for supplying a secondary air into an exhaust gas passage of an engine through a secondary air cleaner which is provided separately from an intake air cleaner to shorten the secondary air passage as much as possible, comprises two expansion chambers in the secondary air cleaner defined by a cup-shaped support for a casing of the cleaner and a silencer along air cleaner elements and an outer wall of the cleaner, thereby effectively prevent noise by supplying the secondary air through the silencer, the air cleaner elements, the two expansion chambers and the reed valve.
The reed valve comprises a base member having radially arranged sector openings, valve seats of an elastic material on peripheries of the openings of the base member, reed valve member having unitary formed radially arranged sector valve member parts corresponding to the openings of the base member, a stopper having integrally formed radially arranged sector stopper parts for limiting lifts of the valve member parts, and a plurality of set screws for fixing the stopper and the reed valve member to the base member, thereby more effectively preventing the noise and improving the durability of the device.

REFERENCES:
patent: 1188969 (1916-06-01), Meister
patent: 1614124 (1927-01-01), Hansen
patent: 3662541 (1972-05-01), Sawada
patent: 4083184 (1978-04-01), Ushijima
patent: 4134263 (1979-01-01), Matsumoto
patent: 4162613 (1979-07-01), Tamura
patent: 4179883 (1979-12-01), Nishiyama

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