Exhaust cleaning fluid control system and vacuum control valve d

Details Exhaust cleaning fluid control system and vacuum control valve d Exhaust cleaning fluid control system and vacuum control valve d

1980-11-19

1982-09-07

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

123327, 123587, 137 85, 137DIG8, F01N 322

Patent

active

043476996

ABSTRACT:
A fluid control system for cleaning exhaust gases of an internal combustion engine by injecting additional air into the exhaust manifold of the downstream of the combustion chamber of the engine according to the engine operating conditions. This system includes a vacuum control valve which supplies vacuum on-off signals to a flow control valve device which meters injecting of additional air. The vacuum control valve device includes a housing, a diaphragm dividing the housing into a first chamber communicating with the engine intake manifold which forms a vacuum source and a second chamber communicating with atmosphere, a valve assembly securely fixed to a center portion of the diaphragm and having a passage intercommunicating the first and second chambers and a valve body normally closing the intercommunicating passage, a solenoid device provided in the second chamber for on-off driving of the diaphragm in response to on-off signals, and a stopper adapted to open the intercommunicating passage by pressing the valve body when the valve assembly is displayed by a predetermined distance for feeding vacuum signals proportional to the engine load from an output port of the housing to a flow control valve when on-off signals are supplied to the solenoid device.

REFERENCES:
patent: 2780230 (1957-02-01), Freeman
patent: 3561410 (1971-02-01), Soeters
patent: 3587617 (1971-06-01), Olsen
patent: 3675633 (1972-07-01), Nakajima
patent: 4033125 (1977-07-01), Inada
patent: 4052996 (1977-10-01), Burrus
patent: 4100735 (1978-07-01), Miyagi
patent: 4146986 (1979-04-01), Kohama
patent: 4166476 (1979-09-01), Yamanaka
patent: 4297984 (1981-11-01), Kawabata
patent: 4316479 (1982-02-01), Franz

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