Ignition timing adjusting device for an internal combustion engi

Details Ignition timing adjusting device for an internal combustion engi Ignition timing adjusting device for an internal combustion engi

1974-12-09

1976-08-10

Myhre, Charles J.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

92 48, 92 63, F02P 504

Patent

active

039735338

ABSTRACT:
A device in which a contact base of a contact breaker is rotated about a cam shaft for effecting ignition timing adjustments for an internal combustion engine. The device comprises a negative pressure chamber defined between a first diaphragm connected to the contact base and a second diaphragm disposed in spaced juxtaposed relation with and having a larger pressure receiving area than the first diaphragm, the second diaphragm being provided with a spring which precludes diaplacement of the diaphragm till the force exerted on the diaphragm reaches a predetermined value. The negative pressure in the intake pipe of the internal combustion engine is introduced into the negative pressure chamber, so that the first diaphragm is displaced to advance ignition when the negative pressure in the negative pressure chamber is in a range of smaller values and the second diaphragm is displaced in a direction in which the first diaphragm is returned to its original position to delay ignition when the negative pressure exceeds the predetermined value.

REFERENCES:
patent: 2596830 (1952-05-01), Udale
patent: 3521609 (1970-07-01), Kashiwagi
patent: 3656410 (1972-09-01), Trower

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