Spark plug

Details Spark plug Spark plug

1998-07-30

2000-12-26

Patel, Ashok

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

H01T 1320, H01T 1332

Patent

active

061664804

ABSTRACT:
A spark plug (1) comprises a center electrode (5), an insulator (3), a metallic shell (2), and a ground electrode (6). The center electrode (5) comprises a body portion (12) having a cylindrical peripheral surface and a front-end-side opposing face (11) opposed in generally parallel to a side face of the ground electrode (6), and a protruding portion (15) which is protruded from the front-end-side opposing face (11) at a position decentered toward one side opposite to the ground electrode (6) with respect to a center axis line of the body portion (12) and which has a top face (14) formed generally parallel to the side face of the ground electrode (6). Then, given a length D of a line segment formed by an intersection that an imaginary plane including the center axis line of the body portion (12) and a center axis line of the ground electrode (6) intersects the front-end-side opposing face (11), and a protruding height h to which the protruding portion (15) protrudes from the front-end-side opposing face (11), a value of h/D is set to not less than 0.2. As a result, mixed air can be smoothly fed to around a spark discharge gap g, and moreover the flame extinction phenomenon becomes unlikely to occur. Thus, a spark plug superior in ignitability can be realized.

REFERENCES:
patent: 4101797 (1978-07-01), Yamamoto

Affiliated with

Also associated with

Rating

Spark plug does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spark plug, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spark plug will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-998431