公开(公告)号：US20100117507A1

公开(公告)日：2010-05-13

申请号：US12595732

申请日：2008-09-10

申请人： Akira Suzuki ,  Tomoaki Kato ,  Mamoru Musasa ,  Jiro Kyuno

发明人： Akira Suzuki ,  Tomoaki Kato ,  Mamoru Musasa ,  Jiro Kyuno

IPC分类号： H01T13/20

CPC分类号： H01T13/20 ,  H01T13/14 ,  H01T13/34 ,  H01T13/39

摘要： The present invention provides a spark plug that includes a center electrode extending in an axial direction, a ceramic insulator having an axial hole formed in the axial direction to retain the center electrode in a front side of the axial hole and thereby form an assembly unit of the center electrode and the ceramic insulator, a metal shell surrounding an outer circumference of the ceramic insulator to retain therein the assembly unit, and a ground electrode having one end portion joined to a front end face of the metal shell and the other end portion facing the center electrode to define a spark gap therebetween, wherein the spark plug satisfies the following conditions: H≧1 mm, Vc≦17 mm3 and Ra≧1.0×10−3 m·K/W where H is a length by which the ceramic insulator protrudes toward the front from the front end face of the metal shell in the axial direction; Vc is a volume of part of the ceramic insulator extending within a range of 2 mm from a front end of the ceramic insulator toward the rear in the axial direction; and Ra is a thermal resistance per unit length, excluding air space, at 20° C. at a cross section of the assembly unit taken perpendicular to the axial direction at a position 2 mm away from the front end of the ceramic insulator.

摘要翻译： 本发明提供一种火花塞，其包括沿轴向延伸的中心电极，具有沿轴向形成的轴向孔的陶瓷绝缘体，以将中心电极保持在轴向孔的前侧，从而形成组装单元 所述中心电极和所述陶瓷绝缘体，围绕所述陶瓷绝缘体的外周的金属壳，以将所述组装单元保持在其中;以及接地电极，所述接地电极具有接合到所述金属壳的前端面的一个端部， 所述中心电极在其间形成火花隙，其中，所述火花塞满足以下条件：H≥1mm，Vc＆nlE; 17mm3，Ra≥1.0×10-3m·K / W其中，H是陶瓷 绝缘体从金属壳体的前端面沿轴向向前突出; Vc是陶瓷绝缘体的一部分的体积，其距离陶瓷绝缘体的前端在轴向方向的后端2mm的范围内延伸; 并且Ra在距离陶瓷绝缘体的前端2mm的位置垂直于轴向的组装单元的截面处，在20℃下，每单位长度的热阻，不包括空气空间。

公开(公告)号：US20090127998A1

公开(公告)日：2009-05-21

申请号：US12275259

申请日：2008-11-21

申请人： Jiro KYUNO ,  Akira Suzuki ,  Mai Moribe ,  Yuichi Nakano ,  Mamoru Musasa

发明人： Jiro KYUNO ,  Akira Suzuki ,  Mai Moribe ,  Yuichi Nakano ,  Mamoru Musasa

IPC分类号： H01T13/20

CPC分类号： H01T13/39

摘要： A spark plug including: a center electrode including an electrode base member and a core member; an electrode tip joined to the center electrode via a molten bond; an insulator holding the center electrode; a metal shell holding the insulator; and a ground electrode joined to the metal shell. Relationships d≦2.1 [mm] and −0.09×d+0.33

摘要翻译： 一种火花塞，包括：中心电极，包括电极基体和芯部; 通过熔融接合连接到中心电极的电极头; 保持中心电极的绝缘体; 保持绝缘体的金属外壳; 以及与金属壳接合的接地电极。 满足关系d <= 2.1 [mm]和-0.09xd + 0.33

公开(公告)号：US06724133B2

公开(公告)日：2004-04-20

申请号：US09953173

申请日：2001-09-17

申请人： Naomichi Miyashita ,  Yoshihiro Matsubara ,  Wataru Matsutani ,  Masayuki Segawa ,  Hiroaki Kuki ,  Mamoru Musasa

发明人： Naomichi Miyashita ,  Yoshihiro Matsubara ,  Wataru Matsutani ,  Masayuki Segawa ,  Hiroaki Kuki ,  Mamoru Musasa

IPC分类号： H01T1320

CPC分类号： H01T13/52 ,  H01T13/39

摘要： A spark plug having a center electrode 2 formed from an electrode base material 2n, which is made of an Ni alloy containing an alloy component (e.g., Cr) capable of forming an oxide semiconductor having a resistivity of negative temperature coefficient. Thus, a corrosion suppression layer originating from the components of the electrode base material is formed on the surface of a tip end portion of the insulator 3, so that corrosion (channeling) of the surface of the tip end portion of the insulator 3 due to creeping spark discharge can be effectively suppressed. In addition, when the constituent metal of the electrode base material 2n has a coefficient of thermal conductivity of 17 to 30 W/m·K, the heat transfer performance of the electrode is enhanced, so that durability against electrode consumption can be greatly improved.

摘要翻译： 一种火花塞，其具有由电极母材2n形成的中心电极2，该电极基体材料由含有能够形成具有负温度系数的电阻率的氧化物半导体的合金成分（例如Cr）的Ni合金制成。 因此，在绝缘体3的前端部的表面上形成起因于电极基体的部件的腐蚀抑制层，由此导致绝缘子3的前端部的表面的腐蚀（沟通） 可以有效地抑制蠕动火花放电。 此外，当电极母材2n的构成金属的导热系数为17〜30W / m·K时，电极的传热性能提高，能够极大地提高耐电极消耗的耐久性。

公开(公告)号：US5702998A

公开(公告)日：1997-12-30

申请号：US285832

申请日：1994-08-04

申请人： Makoto Sugimoto ,  Mamoru Musasa ,  Hiroyuki Tanabe ,  Masahiro Konishi

发明人： Makoto Sugimoto ,  Mamoru Musasa ,  Hiroyuki Tanabe ,  Masahiro Konishi

IPC分类号： C04B35/584 ,  C04B35/597 ,  H01B3/12 ,  H01T13/38 ,  C04B35/581

CPC分类号： H01T13/38 ,  C04B35/597

摘要： In a spark plug insulator having a sintered ceramic body, the ceramic body has silicon nitride (Si.sub.3 N.sub.4), aluminum nitride (AlN) and alumina (Al.sub.2 O.sub.3), the sum of the weight of aluminum nitride (AlN) and alumina (Al.sub.2 O.sub.3) to silicon nitride (Si.sub.3 N.sub.4) is in the range of 0.093.about.1.439. Typically, the additive is represented by the group consisting of yttrium oxide (Y.sub.2 O.sub.3), calcium oxide (CaO), lanthanum oxide (La.sub.2 O.sub.3), magnesia (MgO), cerium oxide (SrO), barium oxide (BaO) and neodymium (Nd.sub.2 O.sub.3). The percentage by weight of the sintering additive ranges from 0.3% to 15.0% of the total weight of the silicon nitride (Si.sub.3 N.sub.4), aluminum nitride (AlN) and alumina (Al.sub.2 O.sub.3).

摘要翻译： 在具有烧结陶瓷体的火花塞绝缘体中，陶瓷体具有氮化硅（Si 3 N 4），氮化铝（AlN）和氧化铝（Al 2 O 3），氮化铝（AlN）和氧化铝（Al 2 O 3）的重量与硅的重量之和 氮化物（Si 3 N 4）在0.093差异1.439的范围内。 通常，添加剂由氧化钇（Y 2 O 3），氧化钙（CaO），氧化镧（La 2 O 3），氧化镁（MgO），氧化铈（SrO），氧化钡（BaO）和钕（Nd 2 O 3） 。 烧结添加剂的重量百分比为氮化硅（Si 3 N 4），氮化铝（AlN）和氧化铝（Al 2 O 3）的总重量的0.3％至15.0％。

公开(公告)号：US5448130A

公开(公告)日：1995-09-05

申请号：US233773

申请日：1994-04-26

申请人： Wataru Matsutani ,  Mamoru Musasa

发明人： Wataru Matsutani ,  Mamoru Musasa

IPC分类号： H01T13/20 ,  H01T13/39

CPC分类号： H01T13/39

摘要： In a spark plug electrode in which an alloyed tip is secured to a firing end of one of opposed electrodes forming a spark gap therebetween, the tip has a spark-erosion resistant noble metal component, and the noble metal component varies as a weight percentage of the alloyed tip in an axial direction of the electrode depending on a magnitude of spark discharges to which a specified portion of the tip is subjected between the opposed electrodes, wherein a largest weight percentage of the noble metal component is provided at areas on the electrode subjected to relatively high magnitude spark discharges, and wherein a smallest weight percentage of the noble metal component is provided at areas on the electrode subjected to relatively low magnitude spark discharges.

摘要翻译： 在火花塞电极中，其中合金端头固定到形成其间的火花间隙的相对电极中的一个的烧制端，所述尖端具有耐火花腐蚀性的贵金属组分，并且所述贵金属组分以重量百分比 根据电极的特定部分在相对电极之间经受的火花放电的大小，电极的轴向方向上的合金尖端，其中在电极上的区域处设置最大重量百分比的贵金属组分， 以相对较高的火花放电，并且其中在电极经受相对低的火花放电的区域处设置最小重量百分数的贵金属组分。

公开(公告)号：US5283134A

公开(公告)日：1994-02-01

申请号：US804786

申请日：1991-12-09

申请人： Makoto Sugimoto ,  Hiroyuki Tanabe ,  Mamoru Musasa

发明人： Makoto Sugimoto ,  Hiroyuki Tanabe ,  Mamoru Musasa

IPC分类号： C04B41/87 ,  C04B35/58 ,  C04B35/581 ,  C04B35/584 ,  H01T13/38 ,  B32B9/00

CPC分类号： H01T13/38

摘要： A spark plug insulator is desirably made up of a sintered body of AlN-based ceramic powder comprising about 60-98% AlN and a sintering additive. There is provided on the surface of the sintered body a layer of pyrolytic boron nitride having a thickness in the range 10-100 .mu.m.

摘要翻译： 火花塞绝缘子理想地由包含约60-98％AlN和烧结添加剂的AlN基陶瓷粉末的烧结体组成。 在烧结体的表面上设置厚度为10-100（m）m的热解氮化硼层。