Engine ignition timing control with multi-stage advances, retard

Details Engine ignition timing control with multi-stage advances, retard Engine ignition timing control with multi-stage advances, retard

1977-12-27

1979-07-03

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117R, 123119A, F02P 504

Patent

active

041597028

ABSTRACT:
A multi-stage engine ignition timing control providing dual stages of advance movement by the use of carburetor spark port vacuum applied to one diaphragm and engine driven air pump pressure applied to a second diaphragm, and the use of a constant reference pressure against one or both of the diaphragms to render the movements independent of barometric pressure changes, and including a one-way coupling to effect a retarded ignition timing setting upon switching of the actuating force acting against the one diaphragm from spark port vacuum to air pump pressure.

REFERENCES:
patent: 2470366 (1949-05-01), Ostling
patent: 3626914 (1971-12-01), Brownson et al.
patent: 3704697 (1972-12-01), Weymann
patent: 3780713 (1973-12-01), Julian
patent: 3809038 (1974-05-01), Young
patent: 3865089 (1975-02-01), Eichler et al.
patent: 3895616 (1975-07-01), Steinke
patent: 4040401 (1977-05-01), Marsee

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