公开(公告)号：US20130221832A1

公开(公告)日：2013-08-29

申请号：US13780682

申请日：2013-02-28

Applicant: Denso Corporation

Inventor： Hiroya ISHIGURO ,  Masaya NAKAMURA

IPC: H01T21/02 ,  H01T13/02

CPC classification number: H01T21/02 ,  H01T13/02 ,  H01T13/39

Abstract: The spark plug has a configuration satisfying the relationships of B≧0.7A and 0.3 mm≦A≦0.6 mm, where B is an axial thickness along the central axis line Q of the weld portion formed between the base material electrode and the noble-metal chip, and A is an axial distance along the central axis line Q between the intersection points P3 and X. The intersection point P3 is a point at which a phantom axis line radially distant from the central axis line Q by D/2 (D being a diameter of the noble-metal chip) intersects with the boundary line between the weld portion and the noble-metal chip. The intersection point X is a point at which an extension of the contour line of the base material electrode in the vicinity of the weld portion intersects with a boundary line between the weld portion and the base material electrode.

Abstract translation: 火花塞具有满足B> = 0.7A和0.3mm @ A @ 0.6mm的关系的构造，其中B是沿着形成在基材电极和贵金属之间的焊接部分的中心轴线Q的轴向厚度， 金属芯片，A是沿着交点P3和X之间的中心轴线Q的轴向距离。交点P3是与中心轴线Q径向离开D / 2（D 作为贵金属芯片的直径）与焊接部和贵金属芯片之间的边界线相交。 交点X是焊接部附近的基材电极的轮廓线的延伸部与焊接部和基材电极之间的边界线相交的点。

公开(公告)号：US20180138665A1

公开(公告)日：2018-05-17

申请号：US15813386

申请日：2017-11-15

Applicant: DENSO CORPORATION

Inventor： Hiroya ISHIGURO ,  Tomoaki YONEKURA

IPC: H01T13/20 ,  H01T13/36 ,  H01T13/12

CPC classification number: H01T13/20 ,  H01T13/08 ,  H01T13/12 ,  H01T13/36

Abstract: A spark plug includes a main fitting having a first, second, and third portions adjacent to each other. The spark plug further includes an insulator having a first opposing portion with a predetermined portion opposed to the first portion with a first interval, a second opposing portion with a second portion opposing the second portion with a second interval, and a third opposed portion opposed to the third portion. A connecting portion between the second opposing portion is supported by a support portion, and a value obtained by dividing the first interval by a length from the support portion to a rear end portion of the predetermined portion is configured to be smaller than a value obtained by dividing the second interval by a length from the support portion to a rear end portion of the second opposed portion.

公开(公告)号：US20140020667A1

公开(公告)日：2014-01-23

申请号：US13910354

申请日：2013-06-05

Applicant: DENSO CORPORATION

Inventor： Hiroya ISHIGURO

IPC: H01T13/20 ,  F02P3/02

CPC classification number: H01T13/20 ,  F02P3/02 ,  H01F38/12 ,  H01T13/44

Abstract: A spark plug for an internal combustion engine has a cylindrical insulator, a center electrode held inside of the insulator, and, a terminal portion held inside of the insulator and electrically connected to the center electrode. The insulator has a insertion portion arranged closer to the base end side than the housing is, the insertion portion being inserted into a cylindrical plug cap. The insertion portion has a non-fit portion formed at the base end of the insulator, and, a fit portion formed to the head end side of the non-fit portion, an outer diameter of the non-fit portion being equal to or smaller than an inner diameter of the plug cap, the fit portion being fitted in the inner periphery surface of the plug cap.

Abstract translation: 用于内燃机的火花塞具有圆柱形绝缘体，保持在绝缘体内部的中心电极，以及保持在绝缘体内部并与中心电极电连接的端子部分。 绝缘体具有比壳体更靠近基端侧布置的插入部，插入部插入圆柱形塞帽中。 插入部分具有形成在绝缘体的基端的非配合部分，并且形成在非配合部分的头端侧的配合部分，非配合部分的外径等于或小于 比插头盖的内径大，嵌合部嵌合于插头盖的内周面。