公开(公告)号：US20200335949A1

公开(公告)日：2020-10-22

申请号：US16814126

申请日：2020-03-10

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Tatsuya GOZAWA ,  Kenji BAN ,  Daiki GOTO

IPC: H01T13/32 ,  H01T13/39 ,  H01T13/54

Abstract: A spark plug having excellent ignitability including a rod-shaped center electrode; a ground electrode that includes a facing portion facing a front end portion of the center electrode and forms a discharge gap between the facing portion and the front end portion of the center electrode; an insulator; a metal shell; and a cover portion that covers, from a front end side of the spark plug, the front end portion of the center electrode and the facing portion of the ground electrode to form a pre-chamber and includes injection holes that are through holes.

公开(公告)号：US20180202886A1

公开(公告)日：2018-07-19

申请号：US15743744

申请日：2016-07-08

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Tatsunori YAMADA ,  Shunsuke TSUGA ,  Yusuke FUJI ,  Junki IWABUCHI ,  Daiki GOTO

IPC: G01L23/18 ,  F02B77/08

CPC classification number: G01L23/18 ,  F02B77/085 ,  F02F1/24 ,  G01L19/0681 ,  G01L23/08 ,  G01L23/10

Abstract: A pressure sensor includes: a diaphragm joined to a front side of a housing via a joint portion; a sensor portion; a connection portion connecting the diaphragm to the sensor portion; and a heat receiving portion disposed at the front side of the diaphragm. When: a minimum value of an area of a minimum inclusion region which is a virtual region, which include a cross-section of a portion from the heat receiving portion to the diaphragm and of which an overall length of a contour become minimum on a cross-section perpendicular to the axial line, is defined as a connection area Sn; and an area of a region surrounded by the joint portion on a projection plane perpendicular to the axial line when the diaphragm and the heat receiving portion are projected onto the projection plane is defined as a diaphragm effective area Sd, (Sn/Sd)≤0.25 is satisfied.

公开(公告)号：US20220294191A1

公开(公告)日：2022-09-15

申请号：US17668796

申请日：2022-02-10

Applicant: NGK Spark Plug Co., Ltd.

Inventor： Tatsuya GOZAWA ,  Shunsuke MAEDA ,  Daiki GOTO

IPC: H01T13/54 ,  H01T13/16 ,  H01T13/06 ,  H01T21/02

Abstract: A spark plug includes a tubular metal shell; an insulator including a locking portion locked onto the metal shell; and a cap disposed at a front end side of the metal shell, the cap having a plurality of orifices. The plurality of orifices include orifices with different cross-sectional areas. A sum of the number of one or more largest orifices and the number of one or more large orifices that have a cross-sectional area of larger than or equal to 90% of the one or more largest orifices is smaller than the number of orifices that are other than the one or more largest orifices and the one or more large orifices. A length of the front end portion in an axial direction between a front end of the insulator and a front end of the locking portion is smaller than or equal to 12 mm.