Secondary air supply system for an internal combustion engine

Details Secondary air supply system for an internal combustion engine Secondary air supply system for an internal combustion engine

1978-04-26

1980-02-26

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60277, F01N 310

Patent

active

041899156

ABSTRACT:
An air switching valve for controlling supply of secondary air to an exhaust system of an engine closes an air release port thereof to increase an amount of secondary air to be supplied at least at an initial stage of an engine acceleration operation. The air switching valve closes a secondary air supply line to stop the supply of the secondary when the engine acceleration operation continues for more than a predetermined time period, thus to prevent an exhaust gas purifier disposed in the exhaust system from over-heat.

REFERENCES:
patent: 3906723 (1975-09-01), Matumoto
patent: 3996739 (1976-12-01), Ono

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