Electro-pneumatic device for regulating the supply of air to an

Details Electro-pneumatic device for regulating the supply of air to an Electro-pneumatic device for regulating the supply of air to an

1975-09-12

1977-12-13

Burns, Wendell E.

Internal-combustion engines

Igniters

Incandescent

60276, 123 32EE, 123119D, 123124B, F02D 104, F01N 300

Patent

active

040623378

ABSTRACT:
An electro-pneumatic device for regulating the supply of air to an internal combustion engine having a carburettor is arranged to supply the air to the engine into a manifold downstream of the carburettor and the air supply is controlled to adjust the richness of the main stream of air and fuel entering the engine to control the richness of the combustible mixture. The device includes a pneumatic regulator valve having two stages in series with each other and the opening and closing of this valve is controlled, to adjust the rate of air supply, by a command pressure produced by connecting the valve alternately to a source of the mixture delivery pressure from the carburettor and a source of higher pressure. This alternate connection is effected by an electrically-operated valve actuated by a signal of square wave form, the frequency of which is a function of engine speed and of a signal delivered by a sensor which senses the composition of the exhaust gases from the engine.

REFERENCES:
patent: 3738341 (1973-06-01), Loos
patent: 3745768 (1973-07-01), Zechnall
patent: 3827237 (1974-08-01), Linder
patent: 3831564 (1974-08-01), Schmidt
patent: 3874171 (1975-04-01), Schmidt
patent: 3910241 (1975-10-01), Fujisawa
patent: 3911884 (1975-10-01), Moriya
patent: 3926154 (1975-12-01), Williams
patent: 3927649 (1975-12-01), Stumpp
patent: 3931710 (1976-01-01), Hartel
patent: 3977375 (1976-08-01), Laprade

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