Spark plug having a multi-layered electrode

Details Spark plug having a multi-layered electrode Spark plug having a multi-layered electrode

1998-10-08

2000-09-19

Patel, Nimeshkumar D.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313142, 313144, H01T 1320

Patent

active

061217190

ABSTRACT:
A spark plug has a central electrode, an insulator, a metal shell and a ground electrode. The insulator is provided exterior to the central electrode. The metal shell is provided exterior to the insulator. The ground electrode opposes the central electrode. At least one of the central electrode and the ground electrode has a multi-layered structure comprising a core and a high heat conducting layer that covers at least part of the outermost surface of the core. An inner layer of the core is more heat conductive than the outermost layer of the core that is in contact with high heat conducting layer.

REFERENCES:
patent: 5210457 (1993-05-01), Oshima et al.
patent: 5461275 (1995-10-01), Oshima
patent: 5530313 (1996-06-01), Chiu
patent: 5866973 (1999-02-01), Kagawa et al.

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