Device for controlling vacuum advancing of ignition timing

Details Device for controlling vacuum advancing of ignition timing Device for controlling vacuum advancing of ignition timing

1977-08-25

1980-04-15

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117R, 123119A, F02P 510

Patent

active

041978218

ABSTRACT:
A device for controlling the vacuum advancing of ignition timing including a vacuum advancer, a diaphragm valve, a first vacuum port opened to an intake passage which is positioned so as to be immediately upstream of a throttle valve when it is fully closed and downstream of the throttle valve when it is slightly opened. A second vacuum port is located absolutely downstream of the throttle valve, wherein the diaphragm valve produces a fraction of the intake manifold vacuum when the throttle valve is fully closed while it communicates therethrough the intake manifold vacuum supplied from the second vacuum port when the throttle valve is opened so as to position the first vacuum port at the downstream thereof.

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patent: 4095568 (1978-06-01), Furukawa

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