Spark plug for use in internal combustion engine

Details Spark plug for use in internal combustion engine Spark plug for use in internal combustion engine

1988-04-05

1989-08-01

Yusko, Donald J.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313144, H01T 1339

Patent

active

048535826

ABSTRACT:
A spark plug for use in internal combustion engines having a pair of electrodes between which electric spark discharge is effected. The spark plug has a spark discharge portion bonded by, for example, resistance welding to at least one of the electrodes and made of a base metal containing at least 90 wt % of chromium (Cr). A stress-relieving portion having a thermal expansion coefficient intermediate in value between those of the electrode and the spark discharge portion may be formed between the electrode and the spark discharge portion.

REFERENCES:
patent: 2327220 (1943-08-01), Ruddies
patent: 4540910 (1985-09-01), Kondo et al.
patent: 4581558 (1986-04-01), Takamura et al.
patent: 4670684 (1987-06-01), Kagawa et al.
patent: 4699600 (1987-10-01), Kondo

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