公开(公告)号：US20050174025A1

公开(公告)日：2005-08-11

申请号：US11049302

申请日：2005-02-03

申请人： Shigenori Okamoto

发明人： Shigenori Okamoto

IPC分类号： H01T13/20 ,  H01T13/32 ,  H01T13/39 ,  H01T13/46 ,  H01T21/02

CPC分类号： H01T13/20 ,  H01T21/02

摘要： An improved structure of a spark plug is provided to ensure a high strength of joint between a ground electrode and a metal shell. The ground electrode is resistance-welded to the metal shell so that it is embedded partially in an end surface of the metal shell to create a weld interface extending from the end surface to an inner periphery of the metal shell, thus resulting in an increased size of the weld interface to increase the joint strength. The resistance welding keeps the temperature of a weld between the ground electrode and the metal shell at a lower level during welding as compared with laser welding, thus minimizing solidification cracking in the weld.

摘要翻译： 提供了一种改进的火花塞结构，以确保接地电极和金属壳之间的接合强度高。 接地电极被电阻焊接到金属壳上，使得其部分地嵌入在金属壳的端面中以形成从金属壳的端面延伸到内周的焊接界面，从而导致尺寸增加 的焊接界面增加了接合强度。 与焊接相比，电阻焊接在焊接期间将接地电极和金属外壳之间的焊接温度保持在较低水平，从而最小化焊接中的凝固裂纹。

公开(公告)号：US06853116B2

公开(公告)日：2005-02-08

申请号：US10066606

申请日：2002-02-06

申请人： Tsunenobu Hori ,  Keiji Kanao

发明人： Tsunenobu Hori ,  Keiji Kanao

IPC分类号： F02P13/00 ,  H01T13/20 ,  H01T13/32 ,  H01T13/39 ,  H01T21/02

CPC分类号： H01T13/39 ,  H01T21/02

摘要： An improved structure of a spark plug which provides higher durability and ignitability of a gaseous fuel. The spark plug consists of a center electrode, a ground electrode, a noble metal chip joined to a center electrode-opposed surface of the ground electrode by laser welding, and a fused portion that forms a weld of the noble metal chip and the ground electrode formed by materials of the ground electrode and the noble metal chip melted together. A sectional area of the noble metal chip traversing a length thereof is between 0.1 mm2 and 0.6 mm2. An unfused sectional area percentage that is a percentage of a sectional area of an unfused portion of a joined end of the noble metal chip within a range of a sectional area of the noble metal chip closest to the fused portion traversing the length of the noble metal chip is less than or equal to 50%. A melt angle that is an angle which a line extending through the fused portion along a maximum depth of the fused portion makes with the center electrode-opposed surface of the ground electrode is less than or equal to 60°.

摘要翻译： 火花塞的改进的结构，其提供气体燃料的更高的耐久性和可燃性。 火花塞由中心电极，接地电极，通过激光焊接而与接地电极的中心电极对置面接合的贵金属芯片，以及形成贵金属芯片和接地电极的焊接部的熔接部 由接地电极和贵金属芯片的材料形成熔融在一起。 穿过其长度的贵金属片的截面积在0.1mm 2和0.6mm 2之间。 贵金属芯片的接合端的未熔合部分的截面积的百分比在最接近穿过贵金属的长度的熔融部分的贵金属芯片的截面积范围内的未界定截面积百分比 芯片小于等于50％。 沿着熔融部分的最大深度延伸通过熔融部分的线与接地电极的中心电极相对表面形成的角度的熔融角小于或等于60°。

公开(公告)号：US06844662B2

公开(公告)日：2005-01-18

申请号：US10661568

申请日：2003-09-15

申请人： Hitoshi Morita ,  Shinichi Okabe ,  Takehiko Kato ,  Hiroshi Yorita ,  Keiji Kanao ,  Tetsuya Miwa

发明人： Hitoshi Morita ,  Shinichi Okabe ,  Takehiko Kato ,  Hiroshi Yorita ,  Keiji Kanao ,  Tetsuya Miwa

IPC分类号： F02P13/00 ,  H01T13/20 ,  H01T13/32 ,  H01T13/39

CPC分类号： H01T13/39 ,  H01T13/20

摘要： At least one of a center electrode tip and a ground electrode tip is made of an iridium alloy. A discharge gap, formed between the center electrode tip and the ground electrode tip, is less than 1.1 mm. And, cross sections of the center electrode tip and the ground electrode tip are equal to or smaller than 0.95 mm2 in a spherical region where a distance from a midpoint of the discharge gap is within 0.6 mm.

摘要翻译： 中心电极尖端和接地电极尖端中的至少一个由铱合金制成。 形成在中心电极尖端和接地电极尖端之间的放电间隙小于1.1mm。 并且，在距离放电间隙的中点的距离在0.6mm以内的球面区域中，中心电极端部和接地电极端部的截面为0.95mm 2以下。

公开(公告)号：US5950584A

公开(公告)日：1999-09-14

申请号：US964216

申请日：1997-11-04

申请人： Guenther Bubeck

发明人： Guenther Bubeck

IPC分类号： F02B23/10 ,  F02B75/12 ,  H01T13/32 ,  H01T13/52 ,  H01T13/20

CPC分类号： H01T13/32 ,  H01T13/52 ,  F02B2075/125 ,  F02B23/101 ,  Y02T10/123

摘要： A spark plug for forming a spark that jumps between two electrodes has an insulating body surrounded by a housing with a ground electrode. The insulating body has a center electrode therein, which projects beyond the ground electrode in the axial direction.

摘要翻译： 用于形成在两个电极之间跳跃的火花的火花塞具有由具有接地电极的壳体包围的绝缘体。 绝缘体在其中具有中心电极，其沿轴向突出超过接地电极。

公开(公告)号：US5828161A

公开(公告)日：1998-10-27

申请号：US727958

申请日：1996-10-09

申请人： Ronald L. Palyu

发明人： Ronald L. Palyu

IPC分类号： H01T13/32 ,  H01T13/20

CPC分类号： H01T13/32

摘要： A cambered shape of an external negative electrode (11) of an internal combustion engine's spark plug so that a spark bridging the plug's spark gap (17) impinges first at the base region (14) and travels outward and around to initiate burn of almost 100% of available fuel. The cambered shape culminates with an end section (16) that is 1/4 of a sphere and has symmetry to the radial edge of a center electrode (13).

摘要翻译： 内燃机火花塞的外部负极（11）的弧形形状，使得桥接火花塞（17）的火花首先在基部区域（14）处撞击并向外并周围行进，从而开始燃烧几乎100 可用燃料的百分比。 弧形的形状最终形成为球体的+ E，fra 1/4 + EE的端部（16），并且与中心电极（13）的径向边缘对称。

公开(公告)号：US5574329A

公开(公告)日：1996-11-12

申请号：US268546

申请日：1994-07-06

申请人： Junichi Kagawa

发明人： Junichi Kagawa

IPC分类号： H01T13/32 ,  H01T21/02

CPC分类号： H01T21/02 ,  H01T13/32

摘要： A spark plug including a tubular insulator supported within a metallic shell, and a center electrode provided to axially extend within the insulator. An outer electrode is secured to a front end of the metallic shell so as to extend toward an elevational side of the center electrode. A first spark-erosion resistant noble metal tip is secured to an outer surface of the outer electrode, the outer electrode extending across a front open end of the metallic shell so as to form a spark gap between an extended end of the tip and the elevational side of the center electrode.

摘要翻译： 一种火花塞，其包括支撑在金属壳内的管状绝缘体和设置成在绝缘体内轴向延伸的中心电极。 外部电极固定在金属外壳的前端，以朝着中心电极的正面延伸。 第一耐火花腐蚀的贵金属端头被固定到外电极的外表面，外电极延伸穿过金属壳的前开口端，以便在尖端的延伸端和垂直线之间形成火花隙 侧中心电极。

公开(公告)号：US5556315A

公开(公告)日：1996-09-17

申请号：US468952

申请日：1995-06-06

申请人： Junichi Kagawa

发明人： Junichi Kagawa

IPC分类号： H01T13/32 ,  H01T21/02

CPC分类号： H01T21/02 ,  H01T13/32

摘要： A method of making a spark plug involves securing an outer electrode to a metallic shell so that at least a portion of the outer electrode is directed inwardly of a front open end of the metallic shell. The outer electrode has an inner surface, an outer surface, and an end surface. A center electrode is supported in an insulator in the metallic shell. A spark-erosion resistant noble metal tip is attached to the outer surface of the outer electrode with a predetermined distance between an elevational side of the center electrode and one end of the spark-erosion resistant noble metal tip.

摘要翻译： 制造火花塞的方法包括将外部电极固定到金属壳体上，使得外部电极的至少一部分被引导到金属壳体的前开口端内侧。 外电极具有内表面，外表面和端表面。 中心电极被支撑在金属外壳中的绝缘体中。 在外电极的外表面上，在中心电极的正面与防火花电镀的贵金属电极头的一端之间具有预定的距离，附着有防火花腐蚀的贵金属电极头。

公开(公告)号：US5502352A

公开(公告)日：1996-03-26

申请号：US291544

申请日：1994-08-16

申请人： Akio Katoh ,  Kozo Takamura

发明人： Akio Katoh ,  Kozo Takamura

IPC分类号： H01T13/20 ,  H01T13/32 ,  H01T13/39 ,  H01T13/46

CPC分类号： H01T13/39 ,  H01T13/467

摘要： According to the present invention, a spark plug for an internal combustion engine includes a center electrode, a ground electrode so as to form a spark gap with the center electrode, and a tip electrode composed of a material having a superior consumable resistance as compared to the center electrode and disposed on an end face of the center electrode so as to form a spark gap with the ground electrode. An axial length of the discharge portion of the ground electrode where spark discharge occurs is substantially larger than an axial length of the tip electrode where spark discharge occurs. When used for an internal combustion engine, a spark discharge is mainly generated between the peripheral surface of the center electrode and the ground electrode during early operation. Consequently, as the center electrode has been consumed, the spark discharge is mainly generated between the tip electrode and the ground electrode. Therefore, the frequency of the spark discharge with the center electrode is lowered, and a low required voltage is maintained.

摘要翻译： 根据本发明，一种用于内燃机的火花塞包括中心电极，接地电极，以便与中心电极形成火花隙，以及由具有优异消耗电阻的材料构成的尖端电极与 中心电极并且设置在中心电极的端面上，以与接地电极形成火花隙。 发生火花放电的接地电极的放电部分的轴向长度大大大于发生火花放电的尖端电极的轴向长度。 当用于内燃机时，在早期操作期间主要在中心电极的外围表面和接地电极之间产生火花放电。 因此，随着中心电极被消耗，主要在尖端电极和接地电极之间产生火花放电。 因此，与中心电极的火花放电的频率降低，并且维持低的所需电压。

公开(公告)号：US5408961A

公开(公告)日：1995-04-25

申请号：US103058

申请日：1993-08-09

申请人： Charles E. Smith

发明人： Charles E. Smith

IPC分类号： H01T13/32 ,  H01T13/46 ,  F02F1/00

CPC分类号： H01T13/467 ,  H01T13/32

摘要： An ignition plug having a center electrode tip and a substantially aerodynamically shaped ground electrode mounted coaxial to the center electrode tip. This construction substantially eliminates shielding and increases the ignition presentation and the aerodynamic flow of fuel in the gap and tip area. This provides greater power, increased gas mileage and reduced pollution. A circular ignition presentation is achieved by positioning the ground electrode around the center electrode forming a substantially uniform gap. Sparks will be emitted from the ground electrode to the center electrode throughout the gap. This provides a greater region of ignition thereby igniting more fuel. Conductive coatings are applied selectively to the inner surface of the ground electrode to control the distribution of electron flow about the gap to improve ignition uniformity. The electrode and insulator in the plug tip have decreased abrupt surface contour discontinuities to allow for aerodynamic flow of fuel. The gap is set permanently at the time of manufacture thereby eliminating problems with setting and maintaining the gap. The ground electrode is formed as an assembly having a base and the plug base includes a recess adapted to accept the base at various positions. Used with a cone-shaped center electrode, the gap can be adjusted by changing the position of the base in the recess prior to affixing the base in the recess.

摘要翻译： 一种火花塞，其具有与中心电极尖端同轴安装的中心电极尖端和基本上空气动力学形状的接地电极。 这种结构基本上消除了屏蔽并增加了间隙和尖端区域中燃料的点燃表现和空气动力学流动。 这提供更大的动力，增加燃油里程和减少污染。 通过将接地电极定位在中心电极周围形成基本均匀的间隙来实现圆形点火呈现。 在整个间隙中，火花从接地电极发射到中心电极。 这提供了更大的点火区域，从而点燃更多的燃料。 选择性地将导电涂层施加到接地电极的内表面以控制围绕间隙的电子流的分布，以提高点火均匀性。 塞头中的电极和绝缘体具有减小的突然表面轮廓不连续性，以允许燃料的空气动力学流动。 间隙在制造时永久地设置，从而消除了设置和保持间隙的问题。 接地电极形成为具有基座的组件，并且插头基座包括适于在各个位置接受基座的凹部。 与锥形中心电极一起使用，可以在将基座固定在凹槽中之前通过改变凹部中基座的位置来调整间隙。

公开(公告)号：US5264754A

公开(公告)日：1993-11-23

申请号：US825082

申请日：1992-01-24

申请人： Santoso Hanitijo ,  Jacques L. Giguere

发明人： Santoso Hanitijo ,  Jacques L. Giguere

IPC分类号： H01T13/20 ,  H01T13/32 ,  H01T13/46

CPC分类号： H01T13/32 ,  H01T13/20

摘要： Disclosed is a spark plug for an internal combustion engine including an annular end portion with a central electrode having an end within the annular end portion. A ground electrode extends from the annular end portion and has a portion extending over and spaced a predetermined distance above the end of the central electrode. The improvement comprises the end of the central electrode having cross-grooves therein defining four end faces and the ground electrode having diverging prongs at its end over the central electrode, a portion of each prong being over two adjacent end faces of the central electrode. Improved ignition is provided without critical manufacturing problems of prior art spark plugs.

摘要翻译： 公开了一种用于内燃机的火花塞，其包括环形端部，其中心电极在环形端部内具有一端。 接地电极从环形端部延伸并且具有在中心电极的端部上方延伸并间隔预定距离的部分。 改进包括中心电极的端部，其中具有限定四个端面的交叉沟槽，并且接地电极在其中心电极的端部处具有扩展插脚，每个插脚的一部分在中心电极的两个相邻的端面之上。 提供了改进的点火，而没有现有技术火花塞的关键制造问题。