Vacuum advance control system

Details Vacuum advance control system Vacuum advance control system

1975-07-15

1977-09-20

Dority, Jr., Carroll B.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

74860, 123117R, F02P 504

Patent

active

040489663

ABSTRACT:
The vacuum advance control system to control the spark timing is disclosed. It comprises the application of a vacuum from the intake manifold of an engine to an advance control in the engine distributor through a vacuum line wherein the intake manifold vacuum controls the spark timing, an air bleed orifice opening to the vacuum line at an opening formed therein; an orifice provided in the vacuum line between the opening and the source of application of the vacuum from the intake manifold so as to prevent excessive flow of air into the engine carburetor and the intake manifold; and means for bleeding an ambient air into the vacuum line through the air bleed orifice. A second air bleed orifice is provided in the system and is at all times open to the ambient air.

REFERENCES:
patent: 2473805 (1949-06-01), Mallory
patent: 3584521 (1971-06-01), Tooker et al.
patent: 3783847 (1974-01-01), Kolody
patent: 3812831 (1974-05-01), Scott, Jr. et al.

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