Control system for engine ignition timing

Details Control system for engine ignition timing Control system for engine ignition timing

1975-08-06

1977-05-10

Husar, C. J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117R, F02P 502

Patent

active

040221695

ABSTRACT:
An ignition timing control member extends through the center of a first vacuum chamber having a central movable sleeve adapted to be contacted by a flange on the control member to limit movement thereof in a direction to advance the ignition timing. The first vacuum chamber is connected to be responsive to vacuum intensity at a first vacuum outlet communicating with the engine intake passage near the throttle valve and upstream therefrom. The control member is moved by vacuum intensity within a second vacuum chamber connected through a selector valve assembly to a second vacuum outlet connected to the engine intake passage downstream from the throttle valve. An electric switch responsive to vacuum intensity in the first vacuum outlet interrupts an electrical circuit through a solenoid coil forming a part of the selector valve assembly, to cause its valve body to move from a first position connecting the second vacuum chamber to the second vacuum outlet to a second position connecting said second vacuum chamber to atmosphere.

REFERENCES:
patent: 2016094 (1935-10-01), Mallory
patent: 3272191 (1966-09-01), Walker
patent: 3478729 (1969-11-01), Tada
patent: 3599614 (1971-08-01), Kittredge
patent: 3793833 (1974-02-01), Van Basshuysen
patent: 3888221 (1975-06-01), Stacey, Jr.
patent: 3913540 (1975-10-01), Hayashi

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