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1.发明授权Spark plug with center electrode having variable diameter portion retracted from front end on insulator 失效具有可变直径部分的中心电极的火花塞从绝缘体上的前端缩回
公开(公告)号：US5929556A
公开(公告)日：1999-07-27
申请号：US746766
申请日：1996-11-15
摘要： In a spark plug in use for an internal combustion engine, a ground electrode is secured to a front end of the metal shell so that a front end surface of the ground electrode faces an elevational side of a front end of the center electrode to cause semi-creeping spark discharges therebetween along a front end surface of the insulator. A front end portion of the center electrode has an electrode base in the axial bore and an electrode front defined diametrically smaller than the electrode base by way of a diameter-variable portion. A diametrical difference between an initial point of the diameter-variable portion of the center electrode and the axial bore of the insulator is 1 mm or less, and the initial point of the diameter-variable portion is retracted by 0.0 mm-1.0 mm from the front end surface of the insulator.
摘要翻译： 在用于内燃机的火花塞中，将接地电极固定在金属壳的前端，使得接地电极的前端面朝向中心电极的前端的前端，使半 - 沿着绝缘体的前端表面在其间放电。 中心电极的前端部分在轴向孔中具有电极基座，电极前端通过直径可变部分沿直径小于电极基座。 中心电极的直径可变部分的初始点与绝缘体的轴向孔之间的直径差为1mm以下，并且直径可变部的初始点从离开的距离缩短0.0mm-1.0mm 绝缘子的前端面。
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公开(公告)号：US06244247B1
公开(公告)日：2001-06-12
申请号：US09180928
申请日：1999-01-25
IPC分类号： F02D4304
CPC分类号： F02P15/08 , F02D41/064 , F02P5/1506 , H01T13/467 , H01T13/52 , Y02T10/46
摘要： In an internal combustion engine, an engine control device 40 judges based on a cooling water temperature of an engine in what state the engine is. When judged that the engine is in a cold state, the engine control device 40 produces an ignition signal to feed it to an igniter 6b so as to spark spark plugs 7 which are individually placed in cylinders at an exhaust stroke or expansion stroke.
摘要翻译： 在内燃机中，发动机控制装置40基于发动机的状态来判断发动机的冷却水温度。 当发动机处于冷态时，发动机控制装置40产生点火信号以将其送入点火器6b，以便在排气冲程或膨胀冲程中点燃单独放置在气缸中的火花塞7。
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3.发明授权Lateral electrode type spark plug with geometrical relationships with ground electrode 失效具有与接地电极几何关系的侧面电极型火花塞
公开(公告)号：US6091185A
公开(公告)日：2000-07-18
申请号：US58781
申请日：1998-04-13
摘要： In a spark plug, a cylindrical metal shell (1) is provided whose inner wall has a rear section and a front section to respectively serve as a diameter-increased section and a diameter-decreased section with a seat portion (1) as a boundary therebetween. An insulator (2) is fixedly placed within the metal shell (1) so that a front end surface (21) of the insulator (2) extends beyond a front end surface (12) of the metal shell (1) with a shoulder portion (231) of an insulator nose (23) engaged against the seat portion (11) of the metal shell (1) by way of a packing (10). A center electrode (3) is fixedly placed within an axial bore (22) of the insulator (2), A ground electrode (4) is connected to the front end surface (12) of the metal shell (1), and bent so that a front end surface (41) of the ground electrode (4) opposes an outer surface (311) of the center electrode (3). The outer surface (311) and a front end surface (31) of the center electrode (3) are provided to respectively serve as a firing portion so as to form a spark discharge gap (Go) with the front end surface (41) of the ground electrode (4), the front end surface (41) of the ground electrode (4) forming an air gap (G) with an outer surface (25) of the insulator (2) so as to release creeping spark discharges along a front end surface (21) of the insulator (2).
摘要翻译： 在火花塞中，设置有圆筒形的金属壳（1），其内壁具有后部和前部，分别用作直径增加部分和具有座部（1）作为边界的直径减小部分 之间。 绝缘体（2）被固定地放置在金属壳体（1）内，使得绝缘体（2）的前端表面（21）延伸超出金属壳体（1）的前端表面（12），肩部 （231）通过密封（10）与金属壳（1）的座部（11）接合的绝缘体鼻（23）。 中心电极（3）固定地放置在绝缘体（2）的轴向孔（22）内，接地电极（4）连接到金属外壳（1）的前端表面（12） 接地电极（4）的前端面（41）与中心电极（3）的外表面（311）相对。 设置中心电极（3）的外表面（311）和前端表面（31）以分别用作点火部分，以便与前端表面（41）形成火花放电间隙（Go） 所述接地电极（4），所述接地电极（4）的前端面（41）与所述绝缘体（2）的外表面（25）形成气隙（G），以沿着所述接地电极 绝缘体（2）的前端面（21）。
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公开(公告)号：US06208066B1
公开(公告)日：2001-03-27
申请号：US09035035
申请日：1998-03-05
IPC分类号： H01T1352
CPC分类号： H01T13/52 , F02B2275/18
摘要： In a semi-creeping discharge type spark plug, a cylindrical metal shell and an insulator are provided, the latter of which has an axial bore and placed within the metal shell so that a front end of the insulator extends beyond the metal shell. A center electrode is placed within the axial bore of the insulator so that a front end surface edge of the center electrode retracts by 0.1˜0.6 mm behind from a front end surface of the insulator. A ground electrode, one end of which is connected to a front end of the metal shell, and the other end of which is bent to oppose an outer surface of the insulator so as to form an air-gap therebetween while permitting creeping spark discharges running along said front end surface of said insulator. A foward edge portion of a front end surface of the ground electrode extends by 0.0˜1.0 mm forward from the front end surface of the insulator.
摘要翻译： 在半爬电式火花塞中，设置有圆柱形金属壳和绝缘体，后者具有轴向孔并且放置在金属壳内，使得绝缘体的前端延伸超出金属壳。 中心电极放置在绝缘体的轴向孔内，使得中心电极的前端表面边缘从绝缘体的前端表面后退0.1〜0.6mm。 接地电极，其一端连接到金属壳的前端，另一端弯曲成与绝缘体的外表面相对，以在其间形成气隙，同时允许蠕变火花放电运行 沿着所述绝缘体的所述前端表面。 接地电极的前端面的前端部从绝缘体的前端面向前方延伸0.0〜1.0mm。
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公开(公告)号：US06617706B2
公开(公告)日：2003-09-09
申请号：US09435368
申请日：1999-11-08
申请人： Yoshihiro Matsubara , Akio Kokubu , Kazumasa Yoshida , Makoto Yamaguchi , Kazuya Iwata , Shoichiro Ito , Hiroshi Ono
发明人： Yoshihiro Matsubara , Akio Kokubu , Kazumasa Yoshida , Makoto Yamaguchi , Kazuya Iwata , Shoichiro Ito , Hiroshi Ono
IPC分类号： H01T1302
CPC分类号： H01T13/39 , H01T13/467
摘要： An ignition system has a spark plug and a positive voltage applying unit. The spark plug includes a central electrode, a porcelain insulator for holding the central electrode, a main metallic shell for holding the porcelain insulator, and a ground electrode electrically connected to the main metallic shell. The positive voltage applying unit applies a positive voltage to the central electrode of the spark plug in comparison with the ground electrode, so that an ignition high voltage is applied between the central electrode and the ground electrode. In the spark plug, a spark discharge gap is formed between the ground electrode and a distal end portion of the central electrode. The ground electrode is positioned so that a rear edge of a mating face opposed to a peripheral side of the central electrode is positioned in the side of the distal end of the central electrode in comparison with an end face of the porcelain insulator.
摘要翻译： 点火系统具有火花塞和正电压施加单元。 火花塞包括中心电极，用于保持中心电极的瓷绝缘体，用于保持瓷绝缘体的主金属壳，以及与主金属壳电连接的接地电极。 正电压施加单元与接地电极相比，向火花塞的中心电极施加正电压，从而在中心电极和接地电极之间施加点火高电压。 在火花塞中，在接地电极和中心电极的远端部分之间形成火花放电间隙。 接地电极的定位使得与瓷绝缘体的端面相比，与中心电极的周边相对的配合面的后边缘位于中心电极的远端侧。
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公开(公告)号：US06225752B1
公开(公告)日：2001-05-01
申请号：US09520971
申请日：2000-03-08
IPC分类号： H05B3702
CPC分类号： H01T13/38 , F02B2275/18 , H01T13/52
摘要： A spark plug for an internal combustion engine is constituted by an insulating member (20) having an axial hole (26) formed along a central shaft (18); a rod-shape central electrode (12) accommodated in the axial hole; and a ground electrode (16) with which an igniting portion (16a) opposite to the outer surface (12a) of the central electrode is formed. In the spark plug, application of voltage between the central electrode and the ground electrode such that the polarity of the central electrode is made to be positive causes discharge to occur between the central electrode and the ground electrode. The spark plug satisfies at least one of the following conditions (a) and (b). (a) When the insulating member is cut along the central axis and a first extension line (60a) in the form obtained by outwards extending a line (60) indicating an end surface of said insulating member adjacent to the igniting portion and a second extension line (61a, 63a) in the form obtained by extending a line (61, 63) indicating the outer surface of the insulating member in the vicinity of the igniting portion are drawn, the distance tp from an intersection (62) between the first and second extension lines to a line indicating an inner surface of the axial hole adjacent to the igniting portion is 1.0 mm or shorter (tp ≦1.0 mm). (b) The difference (&phgr;d2−&phgr;d1) between diameter &phgr;d1 of the central electrode and diameter &phgr;d2 of the axial hole is 0.08 mm or shorter {(&phgr;d2−&phgr;d1) ≦0.8 mm}.
摘要翻译： 一种用于内燃机的火花塞由具有沿着中心轴（18）形成的轴向孔（26）的绝缘构件（20）构成; 容纳在所述轴孔中的杆状中心电极（12） 和形成与中心电极的外表面（12a）相对的点火部分（16a）的接地电极（16）。 在火花塞中，中心电极和接地电极之间的电压施加使得中心电极的极性为正，导致在中心电极和接地电极之间发生放电。 火花塞满足以下条件（a）和（b）中的至少一个。 （a）当绝缘构件沿着中心轴线切割时，以第一延伸线（60a）形成，该第一延伸线（60a）通过向外延伸指示所述绝缘构件的与所述点火部分相邻的端面的线（60）和第二延伸线 以指示在点火部附近表示绝缘构件的外表面的线（61,63）而得到的形式的线（61a，63a）被拉出，距离第一和第 指示与点火部相邻的轴孔的内表面的线的第二延伸线为1.0mm以下（tp <= 1.0mm）。 （b）中心电极的直径phid
1 和直径phid 2之间的差异（phid 2 -phid 1 轴向孔的“SMALLCAPS”为0.08mm以下{（phid 2 -phid 1 ）<= 0.8mm}。 -
7.发明授权
公开(公告)号：US6095124A
公开(公告)日：2000-08-01
申请号：US144850
申请日：1998-09-01
CPC分类号： H01T13/52
摘要： A spark plug having a center electrode, a ground electrode, and an insulator. The ground electrode has a firing surface formed in a tip end side, and the firing surface is opposed to a side face of the center electrode. The insulator covers the outside of the center electrode and is placed such that a tip end portion is between the side face of the center electrode and the firing surface of the ground electrode. A discharge high voltage is applied across the center electrode and the ground electrode such that a polarity of the center electrode is positive and that of the ground electrode is negative. The high voltage causes a spark discharge to be generated between the firing surface of the ground electrode and a tip end portion of the center electrode.
摘要翻译： 具有中心电极，接地电极和绝缘体的火花塞。 接地电极具有形成在前端侧的烧成面，并且烧成面与中心电极的侧面相对。 绝缘体覆盖中心电极的外侧，并且配置成使得前端部位于中心电极的侧面和接地电极的点火面之间。 在中心电极和接地电极之间施加放电高电压，使得中心电极的极性为正，而接地电极的极性为负。 高电压在接地电极的点火面和中心电极的前端部之间产生火花放电。
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8.发明授权Spark plug for internal combustion engine and method for manufacturing spark plug 有权用于内燃机的火花塞和用于制造火花塞的方法公开(公告)号：US08120235B2
公开(公告)日：2012-02-21
申请号：US12741901
申请日：2008-11-20
申请人： Kenji Nunome , Hiroaki Kuki , Hiroyuki Kameda , Kazumasa Yoshida
发明人： Kenji Nunome , Hiroaki Kuki , Hiroyuki Kameda , Kazumasa Yoshida
IPC分类号： H01T13/00
摘要： A spark plug including a center electrode and a ground electrode. A center electrode noble metal tip is joined to a leading end portion of a center electrode, and a ground electrode noble metal tip is joined to a center-electrode-side side surface of the ground electrode. A distal end portion of the ground electrode noble metal tip protrudes from a distal-end surface of the ground electrode by 0.1 mm to 1.5 mm. A center-electrode-side side surface of the ground electrode noble metal tip projects from a center-electrode-side side surface by 0.15 mm to 0.6 mm. The ground electrode includes chamfered portions. Thickness lengths and widthwise lengths of the respective chamfered portions achieved within a cross section perpendicular to a center axis of the ground electrode are set to 0.2 mm or more.
摘要翻译： 一种包括中心电极和接地电极的火花塞。 中心电极用贵金属电极头接合于中心电极的前端部，接地电极用贵金属电极头接合于接地电极的中心电极侧面。 接地电极用贵金属电极头的前端部从接地电极的前端面突出0.1mm〜1.5mm。 接地电极用贵金属电极头的中心电极侧面从中心电极侧面突出0.15mm〜0.6mm。 接地电极包括倒角部分。 在与接地电极的中心轴垂直的截面内实现的各个倒角部的厚度长度和宽度方向的长度设定为0.2mm以上。
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公开(公告)号：US20070216275A1
公开(公告)日：2007-09-20
申请号：US11687828
申请日：2007-03-19
IPC分类号： H01T13/20
摘要： A spark plug 100 comprised of a metal shell 1, an insulator 2, a center electrode 3 and a ground electrode 4. A rear-end face of the ground electrode 4 is welded to a front-end face of the metal shell 1, and a bent portion 5 located at the intermediated position in the longitudinal direction is bent toward the center of the spark plug 100. The ground electrode 4 assumes a circular-shape with a diameter of 2 mm or less whereby an inflow of an air-fuel mixture is not disturbed even when the air-fuel mixture directly flows into a back face of the ground electrode 4. The ground electrode 4 is comprised of an outer layer 4A made of a nickel alloy and an inner layer 4B made of pure copper with an excellent thermal conductivity, in which a ratio of a cross-sectional area of the inner layer 4B to the entire cross-sectional area of the ground electrode 4 is 10% or more to 35% or less. Thus, the spark plug 100 which is excellent in heat sinking ability and can prevent a spring back phenomenon due to a difference in a coefficient of thermal expansion.
摘要翻译： 由金属壳1，绝缘体2，中心电极3和接地电极4构成的火花塞100.接地电极4的后端面焊接在金属壳1的前端面上， 位于中间位置的弯曲部分5朝向火花塞100的中心弯曲。接地电极4呈直径为2mm或更小的圆形，由此空气 - 燃料混合物 即使当空气 - 燃料混合物直接流入接地电极4的背面时也不会受到干扰。接地电极4包括由镍合金制成的外层4A和由纯铜制成的内层4B， 内层4B的截面积与接地电极4的整个横截面积的比率为10％以上35％以下的良好的导热性。 因此，具有散热能力优异且能够防止由于热膨胀系数的差异引起的弹回现象的火花塞100。
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公开(公告)号：US07892468B2
公开(公告)日：2011-02-22
申请号：US12620681
申请日：2009-11-18
申请人： Kazumasa Yoshida
发明人： Kazumasa Yoshida
IPC分类号： B29C53/48
CPC分类号： D02G3/06 , B01D69/10 , D01D5/426 , D01F6/12 , D10B2321/042 , Y10T428/2419 , Y10T442/3033 , Y10T442/3041
摘要： A slit yarn wherein both side parts of the slit yarn are folded one or more times, and the folded width is substantially uniform along the direction of length of the yarn. In this slit yarn, when the width is measured at 20 or more points at intervals of 0.5 m, and the fluctuation coefficient X shown in the following Equation (1) is calculated on the basis of the average value W(avg) and the standard deviation W(σ), this X is (for example) approximately 4% or less. Furthermore, in the slit yarn of the present invention, the abovementioned folded parts are ordinarily shape-set. X(%)=W(σ)/W(avg)×100 (1)
摘要翻译： 狭缝纱线，其中狭缝纱线的两个侧面部分被折叠一次或多次，并且折叠宽度沿着纱线的长度方向基本均匀。 在该狭缝纱中，当以0.5μm的间隔在20个以上的点进行宽度测定时，根据平均值W（avg）和标准（avg）计算下述式（1）所示的变动系数X 偏差W（＆sgr;），该X为（例如）约4％以下。 此外，在本发明的狭缝纱中，上述折叠部分通常成形。 X（％）= W（＆sgr）/ W（avg）×100（1）
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