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1. 发明授权

US08994257B2 Spark plug for internal combustion engine and method for manufacturing same 有权
标题翻译：内燃机用火花塞及其制造方法
公开(公告)号：US08994257B2
公开(公告)日：2015-03-31
申请号：US13780682
申请日：2013-02-28
申请人： Denso Corporation
发明人： Hiroya Ishiguro , Masaya Nakamura
IPC分类号： H01T21/02 , H01T13/02 , H01T13/39
CPC分类号： H01T21/02 , H01T13/02 , H01T13/39
摘要： 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.
摘要翻译：火花塞具有满足B≥0.7A和0.3mm＆amp; NlE; A＆NlE; 0.6mm的关系的构造，其中B是沿着形成在基底材料电极和贵金属之间的焊接部分的中心轴线Q的轴向厚度芯片，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是从中心轴线Q径向远离D / 2的假想轴线（D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。

2. 发明授权

US08878427B2 Spark plug for internal combustion engine and method for manufacturing same 有权
公开(公告)号：US08878427B2
公开(公告)日：2014-11-04
申请号：US13780682
申请日：2013-02-28
申请人： Denso Corporation
发明人： Hiroya Ishiguro , Masaya Nakamura
IPC分类号： H01T21/02 , H01T13/02 , H01T13/39
摘要： 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.

3. 发明授权

US10389091B2 Spark plug for internal combustion engine and ignition system having spark plug 有权
公开(公告)号：US10389091B2
公开(公告)日：2019-08-20
申请号：US13910354
申请日：2013-06-05
申请人： DENSO CORPORATION
发明人： Hiroya Ishiguro
IPC分类号： H01T13/20 , H01T13/44 , F02P3/02 , H01F38/12
摘要： 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.

4. 发明授权

US10148068B2 Spark plug and semi-finished product thereof 有权
公开(公告)号：US10148068B2
公开(公告)日：2018-12-04
申请号：US15813386
申请日：2017-11-15
申请人： DENSO CORPORATION
发明人： Hiroya Ishiguro , Tomoaki Yonekura
IPC分类号： H01T13/20 , H01T13/08 , H01T13/36 , H01T13/12
摘要： 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.

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