Spark plug for internal combustion engine

Details Spark plug for internal combustion engine Spark plug for internal combustion engine

2006-09-12

2006-09-12

Guharay, K. (Department: 2879)

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

C313S142000, C313S144000, C123S1690EL

Reexamination Certificate

active

07105990

ABSTRACT:
Carbon fouling adhered on an insulator tip of a spark plug of the present invention is burnt down by a leak current during an inductive discharge period, due to a promoted ionization before beginning a capacitive discharge, in such an arrangement of a central electrode that a border portion of a body and narrowed portion is positioned in an insulator. The carbon burning-down effect is further improved by a narrow projection provided with an earth electrode, due to increased inductive energy and extended inductive discharge time period. This is because an electric field in a discharge gap is raised, thereby decreasing a discharge voltage and suppressing an energy emitted from a coil during the capacitive discharge.

REFERENCES:
patent: 4700103 (1987-10-01), Yamaguchi et al.
patent: 4845400 (1989-07-01), Takamura et al.
patent: 5159232 (1992-10-01), Sato et al.
patent: 5929556 (1999-07-01), Matsubara et al.
patent: 6094000 (2000-07-01), Osamura et al.
patent: 6316868 (2001-11-01), Ishino et al.
patent: 6470845 (2002-10-01), Kanao
patent: 6720716 (2004-04-01), Shibata et al.
patent: 6750598 (2004-06-01), Hori
patent: 64-27176 (1989-01-01), None
patent: 9-7733 (1997-01-01), None
patent: 2727558 (1997-12-01), None
patent: 2805781 (1998-07-01), None
patent: 2001-307858 (2001-11-01), None
Japanese Office Action dated Aug. 3, 2004 with attachment.
Japanese Official Action dated Apr. 25, 2006 issued in foreign counterpart Japanese Application 2003-027155 and translation.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3593233