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公开(公告)号：US09172215B2
公开(公告)日：2015-10-27
申请号：US13957918
申请日：2013-08-02
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yasushi Sakakura , Yukinobu Hasegawa , Kei Takahashi
Abstract: A spark plug includes a tip joined to a center electrode. The coefficient of linear thermal expansion of the center electrode is greater than that of the tip. The tip has a gap-forming portion having a maximum width of 1.2 mm or greater and forming a gap in cooperation with the ground electrode and a to-be-joined portion joined to the center electrode. At a position A which is shifted 0.1 mm from the forward end of the outer surface of the fusion portion toward the forward end side, the width of the to-be-joined portion measured on the cross section is smaller than the width of the gap-forming portion. The to-be-joined portion satisfies Dtw/Dw≦1.1, where Dtw represents the width of the to-be-joined portion at the position A, and Dw represents the width of the fusion portion at the forward end of the outer surface thereof.
Abstract translation: 火花塞包括连接到中心电极的尖端。 中心电极的线性热膨胀系数大于尖端的线性热膨胀系数。 尖端具有最大宽度为1.2mm以上的间隙形成部，与接地电极和与中心电极接合的被接合部配合形成间隙。 在从熔融部的外表面的前端朝向前端侧偏移0.1mm的位置A处，在截面上测量的被接合部的宽度小于间隙的宽度 形成部分。 被接合部分满足Dtw / Dw＆nlE; 1.1，其中Dtw表示位置A处的被接合部分的宽度，Dw表示在其外表面的前端处的熔化部分的宽度 。
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公开(公告)号：US08878426B2
公开(公告)日：2014-11-04
申请号：US14182607
申请日：2014-02-18
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Yasushi Sakakura , Yuichi Matsunaga
IPC: H01T13/20
Abstract: An ignition plug having enhanced seal performance, while suppressing deformation of a metallic shell thereof. The ignition plug includes a metallic shell having a crimp portion, a male screw portion, a seat portion, and a bent portion. The bent portion has a largest outer diameter (OD) portion, and first and second smallest OD portions, wherein 0.01≦(L2+L3−L1)/(L2+L3)≦0.3 is satisfied. L1 is distance between a point in the first smallest OD portion farthest from center axis and a point in the second smallest OD portion farthest from center axis, L2 is distance between the point in the first smallest OD portion farthest from center axis and a point in the largest OD portion farthest from center axis, and L3 is distance between the point in the second smallest OD portion farthest from center axis and the point in the largest OD portion farthest from center axis.
Abstract translation: 一种具有增强的密封性能的火花塞，同时抑制其金属壳的变形。 火花塞包括具有卷曲部分，阳螺纹部分，座部分和弯曲部分的金属壳体。 弯曲部分具有最大的外径（OD）部分，以及第一和第二最小的OD部分，其中满足0.01和nlE;（L2 + L3-L1）/（L2 + L3）＆nlE; 0.3。 L1是距离中心轴最远的第一最小OD部分中的点与距离中心轴最远的第二最小OD部分中的点之间的距离，L2是距离中心轴最远的第一最小OD部分中的点与距离中心轴最远的点之间的距离 距离中心轴最远的OD部分，L3是距离中心轴最远的第二最小OD部分中的点与最远离中心轴的最大OD部分中的点之间的距离。
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公开(公告)号：US10804682B2
公开(公告)日：2020-10-13
申请号：US16742977
申请日：2020-01-15
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takashi Sekizawa , Tomokatsu Kashima , Yasushi Sakakura
Abstract: A spark plug including a ground electrode including a base material, a tip having a discharge surface, and a melt portion interposed over an entire area between the tip and the base material and joining the tip to the base material; and a center electrode with a spark gap formed between the center electrode and the discharge surface. The tip has, in an inner area surrounded by an outer peripheral portion of the tip, a thin portion in which a distance between the discharge surface and the melt portion is shorter than a distance between the discharge surface and the melt portion in the outer peripheral portion. The thin portion extends from a part of the outer peripheral portion to a part other than the part of the outer peripheral portion.
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公开(公告)号：US09543739B2
公开(公告)日：2017-01-10
申请号：US13869340
申请日：2013-04-24
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yasushi Sakakura
Abstract: A spark plug comprises an insulator having a axial hole penetrating in a direction of an axis, a central electrode provided on the front end side of the axial hole, a tubular metal shell that holds the insulator, and a ground electrode including a surface layer and a core material that is surrounded by the surface layer and has a larger thermal conductivity than that of the surface layer. The metal shell of the spark plug has a protruding portion in which at least a part of the metal shell protrudes toward the front end side in the direction of the axis. The ground electrode has an end surface at one end portion thereof joined to the inside of the protruding portion and the other end portion thereof facing the central electrode.
Abstract translation: 火花塞包括具有沿轴线方向贯穿的轴向孔的绝缘体，设置在轴向孔的前端侧的中心电极，保持绝缘体的管状金属壳，以及包括表面层的接地电极和 由表面层包围并且具有比表面层的导热性更大的导热性的芯材料。 火花塞的金属外壳具有突出部分，其中金属壳体的至少一部分在轴线方向上朝向前端侧突出。 接地电极的一端部的端面与突出部的内侧接合，另一端部面向中心电极。
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公开(公告)号：US09236715B2
公开(公告)日：2016-01-12
申请号：US14536782
申请日：2014-11-10
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yasushi Sakakura , Yukinobu Hasegawa
Abstract: A ground electrode comprised of a noble metal tip having an outer circumferential surface, a holder having an inner circumferential surface defining a through hole for the noble metal tip thereon, and a body to which the holder is joined. At least one of a) the inner circumferential surface of the holder which forms the through hole, and b) the outer circumferential surface of the noble metal tip which is disposed in the through hole, continuously reduces in diameter toward the forward side. A forward end surface of the noble metal tip is located on a forward side with respect to a forward end surface of the holder.
Abstract translation: 一种由具有外周面的贵金属端头构成的接地电极，具有限定用于贵金属电极头的通孔的内周面的保持器和保持器接合的主体。 a）形成通孔的保持器的内周面和b）设置在通孔中的贵金属电极头的外周面中的至少一个朝向前侧连续减小直径。 贵金属电极头的前端面相对于支架的前端面位于前侧。
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Patent Agency Ranking
公开(公告)号：US10270227B2
公开(公告)日：2019-04-23
申请号：US16062357
申请日：2016-10-11
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yukinobu Hasegawa , Yasushi Sakakura
Abstract: An ignition plug includes a ground electrode tip disposed in through hole through a ground electrode base material, a discharge surface of the ground electrode tip being exposed to the center electrode side from the through hole; and a fixing member disposed in the through hole at a part on a second direction side with respect to the large diameter surface.
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公开(公告)号：US09525270B2
公开(公告)日：2016-12-20
申请号：US14896506
申请日：2014-03-06
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yuichi Matsunaga , Yasushi Sakakura
CPC classification number: H01T13/32 , H01T13/16 , H01T13/39 , H01T13/467 , H01T13/54
Abstract: A spark plug (1) includes an insulator (2) having an axial hole (4), a center electrode (5) inserted into the axial hole (4), a metallic shell (3) provided around the insulator (2), a ground electrode (27) whose base end portion is fixed to the metallic shell (3) and which has an annular portion (27A) formed at a forward end portion thereof, the center electrode (5) being disposed radially inward of the annular portion (27A), and an annular tip (32) which is joined to the inner circumference of the annular portion (27A) and which forms a spark discharge gap (28) between the center electrode (5) and the inner circumferential surface of the annular tip (32). Recesses (35) are provided on at least one of the inner and outer circumferences of the annular portion (27A).
Abstract translation: 火花塞（1）包括具有轴向孔（4）的绝缘体（2），插入到轴向孔（4）中的中心电极（5），设置在绝缘体（2）周围的金属壳体（3） 接地电极（27），其基端部固定在金属壳（3）上，并且在其前端形成有环状部（27A），中心电极（5）位于环状部的径向内侧 27A），以及与环状部（27A）的内周接合并在中心电极（5）与环状端部的内周面之间形成火花放电间隙（28）的环形端部（32） （32）。 凹部（35）设置在环状部（27A）的内周和外周的至少一个上。
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公开(公告)号：US09368944B2
公开(公告)日：2016-06-14
申请号：US14787508
申请日：2014-05-21
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yasushi Sakakura
CPC classification number: H01T13/39 , H01T13/32 , H01T13/467
Abstract: A spark plug including a center electrode, an insulator, a metal shell, a first ground electrode, and a second ground electrode. The center electrode extends in an axial direction. The insulator has an axial hole extending in the axial direction. The center electrode is to be inserted into the axial hole. The metal shell is arranged at an outer periphery of the insulator. The first ground electrode has electrical continuity with the metal shell, and forms a first gap with a front end surface of the center electrode. The second ground electrode has electrical continuity with the metal shell, is sealed to metal shell, extends from the metal shell to a position facing a side surface of the center electrode, and forms an annular second gap between the side surface of the center electrode and an inner peripheral surface of the second ground electrode.
Abstract translation: 一种火花塞，包括中心电极，绝缘体，金属壳，第一接地电极和第二接地电极。 中心电极沿轴向延伸。 绝缘体具有沿轴向延伸的轴向孔。 中心电极插入到轴向孔中。 金属外壳布置在绝缘体的外周。 第一接地电极与金属壳具有电连续性，并与中心电极的前端表面形成第一间隙。 第二接地电极与金属壳具有电连续性，被密封到金属壳，从金属壳延伸到面对中心电极的侧表面的位置，并且在中心电极的侧表面和 第二接地电极的内周面。
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公开(公告)号：US20140239798A1
公开(公告)日：2014-08-28
申请号：US14182607
申请日：2014-02-18
Applicant: NGK Spark Plug Co., Ltd.
Inventor： Yasushi Sakakura , Yuichi Matsunaga
IPC: H01T13/20
Abstract: An ignition plug having enhanced seal performance, while suppressing deformation of a metallic shell thereof. The ignition plug includes a metallic shell having a crimp portion, a male screw portion, a seat portion, and a bent portion. The bent portion has a largest outer diameter (OD) portion, and first and second smallest OD portions, wherein 0.01≦(L2+L3−L1)/(L2+L3)≦0.3 is satisfied. L1 is distance between a point in the first smallest OD portion farthest from center axis and a point in the second smallest OD portion farthest from center axis, L2 is distance between the point in the first smallest OD portion farthest from center axis and a point in the largest OD portion farthest from center axis, and L3 is distance between the point in the second smallest OD portion farthest from center axis and the point in the largest OD portion farthest from center axis.
Abstract translation: 一种具有增强的密封性能的火花塞，同时抑制其金属壳的变形。 火花塞包括具有卷曲部分，阳螺纹部分，座部分和弯曲部分的金属壳体。 弯曲部分具有最大的外径（OD）部分，以及第一和第二最小的OD部分，其中满足0.01和nlE;（L2 + L3-L1）/（L2 + L3）＆nlE; 0.3。 L1是距离中心轴最远的第一最小OD部分中的点与距离中心轴最远的第二最小OD部分中的点之间的距离，L2是距离中心轴最远的第一最小OD部分中的点与距离中心轴最远的点之间的距离 距离中心轴最远的OD部分，L3是距离中心轴最远的第二最小OD部分中的点与最远离中心轴的最大OD部分中的点之间的距离。
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公开(公告)号：US20130264935A1
公开(公告)日：2013-10-10
申请号：US13855014
申请日：2013-04-02
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yasushi Sakakura
IPC: H01T13/20
Abstract: An electrode-attached insulator having an insulator provided with an axial hole extending in the direction of an axis and a center electrode which is disposed on a distal-end side of the axial hole and has a front end portion that is exposed from a front end of the insulator. The electrode-attached insulator includes a locking member having a collar portion which is locked on a step portion. The center electrode and the locking member are joined together in the axial hole.
Abstract translation: 一种电极附着绝缘体，其具有设置有沿轴心方向延伸的轴向孔的绝缘体和设置在所述轴向孔的前端侧的中心电极，并且具有从前端露出的前端部 的绝缘体。 电极连接的绝缘体包括锁定构件，该锁定构件具有锁定在台阶部上的套环部分。 中心电极和锁定构件在轴向孔中接合在一起。
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