Vacuum control valve for exhaust gas cleaning system

Details Vacuum control valve for exhaust gas cleaning system Vacuum control valve for exhaust gas cleaning system

1980-11-19

1983-01-04

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

123587, 137 85, F01N 322

Patent

active

043666701

ABSTRACT:
In an exhaust gas cleaning system for an internal combustion engine in which additional air is injected from outside into an engine exhaust manifold by an on-off-duty solenoid valve under control of a microcomputer operating on the partial oxygen pressure in the exhaust gas as detected by an oxygen sensing element, the engine r.p.m. and the exhaust gas temperature, a vacuum control valve adapted to add vacuum signals responsive to variations in the intake manifold vacuum of the engine and throttle opening to the output vacuum signals of the solenoid valve commanding the air injection.

REFERENCES:
patent: 2848202 (1958-08-01), Leibing
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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