Spark plug with combustion pressure switches

Details Spark plug with combustion pressure switches Spark plug with combustion pressure switches

1977-05-26

1978-09-12

Smith, Alfred E.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Plural circuit elements

315 56, 315 73, 313126, H01T 1340

Patent

active

041140680

ABSTRACT:
A spark plug for an internal combustion engine, the spark plug comprising a casing, a center electrode, a connector pin for the center electrode, and a plunger adapted to be axially displaced within the spark plug by the compression pressure as pressure builds in the cylinder, the plunger first closes a set of contacts in the spark plug causing current to flow in the primary side of an ignition coil, then closes a second set of contacts in the spark plug connecting the center electrode to the secondary side of the ignition coil, and finally opens the first set of contacts causing a large voltage to be induced in the secondary side which voltage is applied to the center electrode.

REFERENCES:
patent: 1213637 (1917-01-01), Heginbottom
patent: 1315002 (1919-09-01), Atkinson et al.
patent: 3361929 (1958-01-01), Vandover

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