公开(公告)号：US11424600B1

公开(公告)日：2022-08-23

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 ,  H01T21/02 ,  H01T13/06 ,  H01T13/16

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.

公开(公告)号：US09897063B2

公开(公告)日：2018-02-20

申请号：US14356316

申请日：2013-04-18

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shunsuke Maeda ,  Yoshihiro Nakamura ,  Masahiro Kawakatsu ,  Hiroyuki Suzuki

IPC: B23K26/00 ,  F02P19/02 ,  F23Q7/00 ,  B23K26/244 ,  B23K26/28

CPC classification number: F02P19/028 ,  B23K26/244 ,  B23K26/28 ,  F23Q7/001 ,  F23Q2007/005

Abstract: A glow plug (100) includes: a housing (130) having a metal shell (110) and a cap unit (120); and a heater unit (150). A coupling member (180) is joined with the housing (130) and is also joined with the heater unit (150) at its edge portion (188), so as to enable the heater unit (150) to move along an axis line O and couple the heater unit (150) with the housing (130). When the edge portion 188 of the coupling member 180 is irradiated with a laser, at least part of the edge portion (188) melted by laser welding fills a gap (50) between the coupling member (180) and the heater unit (150) to form a welded part (210). As a result, even when there is a gap prior to welding, the weld strength between the coupling member (180) and the heater unit (150) can be maintained.

公开(公告)号：US20150048066A1

公开(公告)日：2015-02-19

申请号：US14356316

申请日：2013-04-18

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shunsuke Maeda ,  Yoshihiro Nakamura ,  Masahiro Kawakatsu ,  Hiroyuki Suzuki

IPC: F02P19/02 ,  B23K26/20 ,  F23Q7/00

CPC classification number: F02P19/028 ,  B23K26/244 ,  B23K26/28 ,  F23Q7/001 ,  F23Q2007/005

Abstract: A glow plug (100) includes: a housing (130) having a metal shell (110) and a cap unit (120); and a heater unit (150). A coupling member (180) is joined with the housing (130) and is also joined with the heater unit (150) at its edge portion (188), so as to enable the heater unit (150) to move along an axis line O and couple the heater unit (150) with the housing (130). When the edge portion 188 of the coupling member 180 is irradiated with a laser, at least part of the edge portion (188) melted by laser welding fills a gap (50) between the coupling member (180) and the heater unit (150) to form a welded part (210). As a result, even when there is a gap prior to welding, the weld strength between the coupling member (180) and the heater unit (150) can be maintained.

Abstract translation: 电热塞（100）包括：具有金属壳（110）和盖单元（120）的壳体（130）; 和加热器单元（150）。 联接构件（180）与壳体（130）接合，并且在其边缘部分（188）处与加热器单元（150）接合，以使得加热器单元（150）能够沿着轴线O 以及将加热器单元（150）与壳体（130）联接。 当用激光照射联接构件180的边缘部分188时，通过激光焊接熔化的边缘部分（188）的至少一部分填充联接构件（180）和加热器单元（150）之间的间隙（50） 以形成焊接部件（210）。 结果，即使在焊接之前存在间隙，也可以保持联接构件（180）和加热器单元（150）之间的焊接强度。

公开(公告)号：US09366594B2

公开(公告)日：2016-06-14

申请号：US13970360

申请日：2013-08-19

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shunsuke Maeda ,  Yoshihiro Nakamura ,  Masayoshi Matsui

IPC: G01M15/08 ,  G01L23/00 ,  G01L23/08 ,  G01L23/22

CPC classification number: G01L23/00 ,  G01L23/08 ,  G01L23/22

Abstract: A combustion pressure sensor (1) includes a housing (2) having an axial hole (23), a flexible member (8) fixed at one end to the housing (2) and being displaceable along the direction of axis (CL1), a pressure transmission body (3) whose outer circumferential surface is fixed to the other end of the flexible member (8), and a sensor element (42) fixed to the housing (2) and outputting a signal on the basis of a pressure applied thereto from the pressure transmission body (3). The housing (2) includes a main body portion (21) having a screw portion (24), and a cap member (22) having a press contact portion (26) which is pressed against the internal combustion engine when the screw portion (24) is screwed into the mounting hole of an internal combustion engine. The one end of the flexible member (8) is fixed to the main body portion (21).