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1. 发明授权

US09160148B2 Method of manufacturing spark plug 有权
标题翻译：制造火花塞的方法
公开(公告)号：US09160148B2
公开(公告)日：2015-10-13
申请号：US14078896
申请日：2013-11-13
申请人： NGK SPARK PLUG CO., LTD.
发明人： Jiro Kyuno
IPC分类号： H01T13/60 , H01T21/02 , H01T21/06
CPC分类号： H01T21/02 , G01R31/1227 , H01T13/60 , H01T21/06
摘要： A method for manufacturing a spark plug includes: a preparation step of preparing a specimen provided with a center electrode, an insulator, a metal shell, and a ground electrode; and an inspection step of applying a predetermined voltage between the ground electrode and the center electrode of the prepared specimen, and determining whether dielectric breakdown is caused in the insulator. The inspection step includes a calculation step and a judgment step. The calculation step involves receiving an oscillating wave generated from the specimen upon application of the predetermined voltage to the specimen, obtaining a power spectrum by subjecting an oscillating wave signal representing the oscillating wave to fast Fourier transform, and then calculating an integral of a predetermined frequency range in the power spectrum. In the judgment step, whether discharge is caused by dielectric breakdown of the insulator is judged by utilizing the integral.
摘要翻译：火花塞的制造方法包括：准备具有中心电极，绝缘子，金属壳和接地电极的试样的准备工序; 以及在所述接地电极和所述准备试样的中心电极之间施加规定的电压，并且确定是否在所述绝缘体中引起介质击穿的检查步骤。检查步骤包括计算步骤和判断步骤。计算步骤包括：在向样本施加预定电压时接收从样本产生的振荡波，通过对表示振荡波的振荡波信号进行快速傅里叶变换，然后计算预定频率的积分来获得功率谱功率谱范围。在判断步骤中，通过利用积分来判断绝缘体的绝缘击穿是否导致放电。

2. 发明授权

US09455553B2 Spark plug 有权
标题翻译：火花塞
公开(公告)号：US09455553B2
公开(公告)日：2016-09-27
申请号：US14767022
申请日：2014-02-12
申请人： NGK SPARK PLUG CO., LTD.
发明人： Takuya Shimamura , Jiro Kyuno
IPC分类号： H01T13/08
CPC分类号： H01T13/08
摘要： A spark plug includes a metal shell formed with a mounting male thread portion and a radially outwardly protruding seat portion and a solid annular gasket disposed between the male thread portion and the seat portion. The gasket has a recessed portion formed with a depth in the direction of an axis such that the recessed portion has an opening at a front end surface of the gasket (18) located opposite to the seat portion. The front end surface of the gasket includes an inner peripheral front end surface region decreasing in thickness toward an inner periphery of the gasket and an outer peripheral front end surface region formed radially outside the inner peripheral front end surface region. The opening of the recessed portion is located radially inside an innermost periphery of the outer peripheral front end surface region.
摘要翻译：火花塞包括形成有安装外螺纹部分和径向向外突出的座部分的金属壳和设置在阳螺纹部分和座部之间的实心环形垫圈。垫圈具有凹部，该凹部在轴线方向上形成有深度，使得凹部在位于与座部相对的垫圈（18）的前端表面处具有开口。垫圈的前端面包括朝向垫圈的内周减小的内周前端面区域和形成在内周前端面区域的径向外侧的外周前端面区域。凹部的开口位于外周前端面区域的最内周侧的径向内侧。

3. 发明授权

US09166376B2 Spark plug 有权
标题翻译：火花塞
公开(公告)号：US09166376B2
公开(公告)日：2015-10-20
申请号：US14016845
申请日：2013-09-03
申请人： NGK SPARK PLUG CO., LTD.
发明人： Jiro Kyuno
IPC分类号： H01T13/08 , H01T13/12 , H01T13/36
CPC分类号： H01T13/08 , H01T13/12 , H01T13/36
摘要： A spark plug includes a tubular insulator and a tubular metal shell secured to an outer peripheral surface of the insulator by crimping. The tubular metal shell includes: an inner peripheral surface where powder for sealing is filled between the outer peripheral surface and the inner peripheral surface; a tool engagement portion overhanging in a polygonal shape; and a crimped lid disposed at an end portion of the metal shell coupled to the tool engagement portion, the end portion being bent toward the outer peripheral surface of the insulator by crimping. A relationship between a length L and a thickness t satisfies 2.50≦L/t≦3.10, the length L being a length along a shape of the crimped lid from the tool engagement portion to the insulator in a planar surface that passes through the axis, the thickness t being a thickness at an intermediate portion of the crimped lid.
摘要翻译：火花塞包括管状绝缘体和通过卷曲固定到绝缘体的外周表面的管状金属壳。管状金属壳体包括：内周面，其中密封用粉末填充在外周面和内周面之间; 多边形突出的工具接合部; 以及设置在与工具接合部接合的金属外壳的端部处的卷边盖，端部通过卷曲而朝向绝缘体的外周面弯曲。长度L和厚度t之间的关系满足2.50＆nlE; L / t＆nlE; 3.10，长度L是沿着通过轴线的平面中从工具接合部到绝缘体的卷曲盖的形状的长度厚度t为卷边盖的中间部分的厚度。

4. 发明申请

US20130134857A1 SPARK PLUG 有权
标题翻译： SPARK插头
公开(公告)号：US20130134857A1
公开(公告)日：2013-05-30
申请号：US13685008
申请日：2012-11-26
申请人： NGK Spark Plug CO., LTD.
发明人： Takuya Shimamura , Jiro Kyuno
IPC分类号： H01T13/16
CPC分类号： H01T13/16 , H01T13/34 , H01T13/36
摘要： A spark plug comprises an insulator and a metal shell. The insulator includes a nose length portion at the forward end, and a tapered portion, extending from the rear end of the nose length portion toward the rear end of the insulator, increased in diameter toward the rear end. The metal shell includes a shoulder portion, protruding inward and having a retaining surface by which the tapered portion is retained, and a male thread portion on the outer peripheral side of the shoulder portion, and the thread diameter of the male thread portion is set to M12 or less. When the insulator's cross-sectional area, perpendicular to an axis, passing through the boundary between the nose length section and tapered portion is B (mm2), and the metal shell's cross-sectional area, perpendicular to the axis, passing through the tip of the retaining surface is C (mm2), 2.80≦C/B≦3.50 is satisfied.
摘要翻译：火花塞包括绝缘体和金属壳。绝缘体包括在前端的鼻长部分，并且从鼻长度部分的后端延伸到绝缘体的后端的锥形部分朝向后端直径增加。金属壳包括：向内突出并具有保持锥形部的保持面的肩部，肩部的外周侧的外螺纹部，外螺纹部的螺纹直径设定为 M12以下。当绝缘体的垂直于轴线的横截面积通过鼻长部分和锥形部分之间的边界为B（mm2）时，金属壳的横截面积垂直于轴线，穿过尖端保持面为C（mm2），满足2.80 @ C / B @ 3.50。

5. 发明授权

US10044173B2 Method of manufacturing spark plug 有权
公开(公告)号：US10044173B2
公开(公告)日：2018-08-07
申请号：US15582912
申请日：2017-05-01
申请人： NGK SPARK PLUG CO., LTD.
发明人： Jiro Kyuno
IPC分类号： H01T21/02 , H01T13/58 , H01J9/00
摘要： A method of manufacturing a spark plug including a cylindrical tubular metallic shell having a screw portion on an outer surface thereof and a ground electrode attached to an end surface at one end of the metallic shell in the direction of the center axis thereof comprises a measurement step of measuring a surface of the screw portion which passes through a measurement region located at a predetermined position in the direction of the center axis, while rotating the metallic shell about the center axis thereof; an attachment position calculation step of calculating, on the basis of information obtained in the measurement step, an attachment position at which the ground electrode is attached to the end surface; and a joining step of joining the ground electrode to the end surface at the attachment position, wherein the measurement step includes a step of measuring a displacement of the surface of the screw portion by using a non-contact-type displacement sensor.

6. 发明授权

US09270088B2 Method for inspecting spark plug and method for manufacturing spark plug 有权
标题翻译：检查火花塞的方法及制造火花塞的方法
公开(公告)号：US09270088B2
公开(公告)日：2016-02-23
申请号：US14079989
申请日：2013-11-14
申请人： NGK SPARK PLUG CO., LTD.
发明人： Jiro Kyuno
IPC分类号： H01T13/60 , H01T21/06 , H04N5/372
CPC分类号： H01T13/60 , H01T21/02 , H01T21/06 , H04N5/372
摘要： A method for inspecting a spark plug that includes a tubular insulator having an axial hole, a center electrode inserted into the axial hole at a front end side thereof, a tubular metallic shell disposed around the insulator, an annular space defined by an outer circumferential surface of the insulator, and an inner circumferential surface of the metallic shell and opened frontward. The method includes steps of: inspecting insulation performance of the insulator based on whether dielectric breakdown is caused in the insulator when a voltage is applied to the center electrode; photographing an area including at least the center electrode, the insulator, and the annular space from a front end side in the direction of the axis when the voltage is applied to the center electrode; and determining whether the dielectric breakdown has occurred based on the photographed image.
摘要翻译：一种用于检查火花塞的方法，该火花塞包括具有轴向孔的管状绝缘体，插入到其前端侧的轴向孔中的中心电极，设置在绝缘体周围的管状金属壳，由外周表面限定的环形空间的绝缘体和金属外壳的内周面向前开口。该方法包括以下步骤：基于当对中心电极施加电压时在绝缘体中是否引起绝缘击穿，检查绝缘体的绝缘性能; 当将电压施加到中心电极时，沿着轴的方向从前端侧拍摄至少包括中心电极，绝缘体和环形空间的区域; 以及基于所拍摄的图像确定是否发生了介电击穿。

7. 发明授权

US08729785B2 Spark plug 有权
标题翻译：火花塞
公开(公告)号：US08729785B2
公开(公告)日：2014-05-20
申请号：US13685008
申请日：2012-11-26
申请人： NGK Spark Plug Co., Ltd.
发明人： Takuya Shimamura , Jiro Kyuno
IPC分类号： H01T13/00
CPC分类号： H01T13/16 , H01T13/34 , H01T13/36
摘要： A spark plug comprises an insulator and a metal shell. The insulator includes a nose length portion at the forward end, and a tapered portion, extending from the rear end of the nose length portion toward the rear end of the insulator, increased in diameter toward the rear end. The metal shell includes a shoulder portion, protruding inward and having a retaining surface by which the tapered portion is retained, and a male thread portion on the outer peripheral side of the shoulder portion, and the thread diameter of the male thread portion is set to M12 or less. When the insulator's cross-sectional area, perpendicular to an axis, passing through the boundary between the nose length section and tapered portion is B (mm2), and the metal shell's cross-sectional area, perpendicular to the axis, passing through the tip of the retaining surface is C (mm2), 2.80≦C/B≦3.50 is satisfied.
摘要翻译：火花塞包括绝缘体和金属壳。绝缘体包括在前端的鼻长部分，并且从鼻长度部分的后端延伸到绝缘体的后端的锥形部分朝向后端直径增加。金属壳包括：向内突出并具有保持锥形部的保持面的肩部，肩部的外周侧的外螺纹部，外螺纹部的螺纹直径设定为 M12以下。当绝缘体的垂直于轴线的横截面积通过鼻长部分和锥形部分之间的边界为B（mm2）时，金属壳的横截面积垂直于轴线，穿过尖端保持面为C（mm2），2.80＆nlE; C / B＆nlE; 3.50。

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