Secondary air control system in an internal combustion engine

Details Secondary air control system in an internal combustion engine Secondary air control system in an internal combustion engine

1980-01-30

1981-11-10

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60301, 60306, F01N 315

Patent

active

042990890

ABSTRACT:
This application discloses a secondary air control system in an internal combustion engine. The system comprises: an exhaust gas purifying device mounted on an exhaust pipe; a secondary air control valve which comprises a diaphragm actuated by vacuum pressure for controlling secondary supply air to said exhaust gas purifying device; a solenoid valve for controlling said vacuum pressure which acts upon said secondary air control valve; a vacuum sensor which detects the vacuum pressure at a small venturi of a carburetor; a thermo-sensor for detecting the intake air temperature; an air flow meter mounted on a secondary air supply pipe; a thermo-sensor for detecting the secondary air temperature mounted on said secondary air supply pipe, and; a computer to which said valuum sensor, said thermo-sensors, and said air flow meter are connected so as to feed input signals thereto, said solenoid valve being connected to the output of said computer so as to control the secondary air quantity in response to said input signals.

REFERENCES:
patent: 3696618 (1972-10-01), Boyd
patent: 3730157 (1973-05-01), Gerhold
patent: 3859541 (1975-01-01), Hattori
patent: 3863444 (1975-02-01), Nakajima
patent: 3962867 (1976-06-01), Ikeura
patent: 3974651 (1976-08-01), Nakajima
patent: 4110979 (1978-09-01), Miyagi

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