Apparatus for introducing secondary air into an internal combust

Details Apparatus for introducing secondary air into an internal combust Apparatus for introducing secondary air into an internal combust

1976-12-02

1978-11-07

Casaregola, Louis J.

Power plants

Internal combustion engine with treatment or handling of...

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

F01N 310, F01N 315

Patent

active

041239040

ABSTRACT:
An apparatus is provided for introducing secondary air for into an internal combustion engine. The apparatus has an air pump coupled to an air injection pipe system, the latter having an end terminating upstream of the catalytic converter, for introducing an amount of secondary air into the exhaust system of the engine. The apparatus further includes a valve device for maintaining the secondary air directed to the exhaust system from the air pump at determined constant pressure; thus, the amount of secondary air introduced into the exhaust system is effectively decreased during high rotational speed engine operation in order to prevent the catalytic converter from being overheated.

REFERENCES:
patent: 3927524 (1975-12-01), Cholvin
patent: 3950943 (1976-04-01), Paddock et al.
patent: 3955364 (1976-05-01), Lewis
patent: 4007756 (1977-02-01), Umino
patent: 4077208 (1978-03-01), Sawada

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