Secondary air supply control device for exhaust gas purifying ap

Details Secondary air supply control device for exhaust gas purifying ap Secondary air supply control device for exhaust gas purifying ap

1982-07-13

1984-10-16

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60293, F02B 7510, F01N 322

Patent

active

044766769

ABSTRACT:
Herein disclosed is a secondary air supply control device for use with an apparatus for purifying an exhaust gas of an internal combustion engine. In the exhaust gas purifying apparatus, a secondary air supply system is made to communicate with the exhaust system of the internal combustion engine so that secondary air may be supplied during the running operation of the internal combustion engine to said exhaust system thereby to oxidize and clear the unburned noxious content of said exhaust system. The secondary air supply control device comprises a vacuum-operated secondary air control valve which is disposed midway of said secondary air supply system for controlling the flow rate of the secondary air to be supplied to said exhaust system; and means for controlling said vacuum-operated secondary air control valve during the deceleration and the choking operation at the start of said engine so that the supply of the secondary air to said exhaust system is interrupted.

REFERENCES:
patent: 3805522 (1974-04-01), Sheppard
patent: 3849984 (1974-11-01), Toda
patent: 3919843 (1975-11-01), Arnaud
patent: 4222237 (1980-09-01), Kohama

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