Vacuum controlled ignition timing apparatus for internal combust

Details Vacuum controlled ignition timing apparatus for internal combust Vacuum controlled ignition timing apparatus for internal combust

1977-03-10

1979-04-17

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117R, F02P 510

Patent

active

041494997

ABSTRACT:
Ignition timing control apparatus for an internal combustion spark ignition engine employs a vacuum actuator having a movable element positioned between first and second vacuum chambers and arranged to advance or retard the spark timing. A single three-way control valve, electrically operated, serves to connect one of the vacuum chambers to engine intake vacuum pressure and to vent the other vacuum chamber to atmosphere, depending on speed of the vehicle driven by the engine. A temperature responsive valve cuts off engine intake vacuum pressure to the three-way control valve when the ambient temperature drops below a predetermined level.

REFERENCES:
patent: 3272191 (1966-09-01), Walker
patent: 3603298 (1971-09-01), Toda et al.
patent: 3650253 (1972-03-01), Cooksey
patent: 3687120 (1972-08-01), Lenz
patent: 3704697 (1972-12-01), Weymann
patent: 3804326 (1974-04-01), McIntire
patent: 3885535 (1975-05-01), Walker
patent: 3978831 (1976-09-01), Yoshikawa
patent: 4027633 (1977-06-01), Otsubo et al.
patent: 4051823 (1977-10-01), Mogi et al.

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