Temperature compensated internal combustion engine ignition spar

Details Temperature compensated internal combustion engine ignition spar Temperature compensated internal combustion engine ignition spar

1975-09-05

1977-07-12

Dority, Jr., Carroll B.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

200 31V, F02P 504

Patent

active

040347265

ABSTRACT:
The spark initiating mechanism of the ignition distributor is operated by the operating rod of a vacuum actuator unit in response to engine intake manifold vacuum to provide ignition spark vacuum advance. The enclosed space defined by the outer casing of the vacuum actuator unit is divided into a first chamber exposed to atmosphere and a second vacuum chamber by a flexible diaphragm in operating engagement with the operating rod. An exhaust port opening into the vacuum chamber is provided with a dual valve arrangement including a normally closed valve operable to the open position by the force of the diaphragm member flexing in the direction to produce increased ignition spark vacuum advance and a temperature sensitive valve located between the normally closed valve and atmosphere which automatically operates to the closed position with ambient temperatures less than a predetermined value and to the open position with ambient temperatures greater than the predetermined value.

REFERENCES:
patent: 3800758 (1974-04-01), Sutherland
patent: 3800767 (1974-04-01), Winkley
patent: 3913539 (1975-10-01), Winkley
patent: 3923023 (1975-12-01), Ito et al.
patent: 3939810 (1976-02-01), Walker

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