Spark plug for internal combustion engine

Patent metadata

Field	Value
Publication number	US-9166377-B2
Application number	US-201313743753-A
Country	US
Kind code	B2
Filing date	Jan 17, 2013
Priority date	Feb 17, 2012
Publication date	Oct 20, 2015
Grant date	Oct 20, 2015

Abstract

The spark plug for an internal combustion engine has a cylindrical housing, a center electrode held inside the housing, a ground electrode connected to the housing and forming a spark discharge gap between itself and the center electrode, and, an end projection projected from the end portion of the housing toward the head end side of the spark plug. The center electrode and ground electrode are arranged so that most of the spark discharge gap is disposed over the open areas and the electrode area in which the end projection is arranged.

First claim

What is claimed is:

1. A spark plug for an internal combustion engine, comprising:
a housing formed to surround a plug center axis, and to have an end portion;
a center electrode arranged inside the housing, extended along the axial direction and formed to have an end where a discharge portion is formed;
a ground electrode connected to the housing; and
an end projection projected from the end portion of the housing toward a head end side of the spark plug,
wherein, the gr…

Assignees

• Denso Corp

Inventors

• Aochi Takanobu
• Shibata Masamichi

Classifications

• H01T13/32 Primary

  Electricity · mapped topic

• H01T13/20 Primary

  Electricity · mapped topic