公开(公告)号：US07224109B2

公开(公告)日：2007-05-29

申请号：US11136393

申请日：2005-05-25

申请人： Keiji Kanao

发明人： Keiji Kanao

IPC分类号： H01T13/20

CPC分类号： H01T13/32

摘要： A ground electrode has one end portion fixed to a metal housing, a bent portion provided at an intermediate portion thereof, and the other end portion positioned in a confronting relationship with a center electrode to form a spark discharge gap. The ground electrode contains either Ni or Fe as a main component and at least one additive selected from the group consisting of Cr and Al. A cross-sectional area S of the ground electrode is not less than 2 mm2 and not greater than 3 mm2. An average value D of crystal grain diameters in a thickness direction is not less than 100 μm at least at the bent portion.

摘要翻译： 接地电极具有固定到金属壳体的一个端部，设置在其中间部分的弯曲部分，并且另一端部以与中心电极相对的关系位置形成火花放电间隙。 接地电极含有Ni或Fe作为主要成分和至少一种选自Cr和Al的添加剂。 接地电极的横截面积S不小于2mm 2且不大于3mm 2。 晶粒直径在厚度方向上的平均值D至少在弯曲部分不小于100μm。

公开(公告)号：US20050264152A1

公开(公告)日：2005-12-01

申请号：US11136393

申请日：2005-05-25

申请人： Keiji Kanao

发明人： Keiji Kanao

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

CPC分类号： H01T13/32

摘要： A ground electrode has one end portion fixed to a metal housing, a bent portion provided at an intermediate portion thereof, and the other end portion positioned in a confronting relationship with a center electrode to form a spark discharge gap. The ground electrode contains either Ni or Fe as a main component and at least one additive selected from the group consisting of Cr and Al. A cross-sectional area S of the ground electrode is not less than 2 mm2 and not greater than 3 mm2. An average value D of crystal grain diameters in a thickness direction is not less than 100 μm at least at the bent portion.

摘要翻译： 接地电极具有固定到金属壳体的一个端部，设置在其中间部分的弯曲部分，并且另一端部以与中心电极相对的关系位置形成火花放电间隙。 接地电极含有Ni或Fe作为主要成分和至少一种选自Cr和Al的添加剂。 接地电极的横截面积S不小于2mm 2且不大于3mm 2。 晶粒直径在厚度方向上的平均值D至少在弯曲部分不小于100μm。

公开(公告)号：US20050116598A1

公开(公告)日：2005-06-02

申请号：US10990988

申请日：2004-11-18

申请人： Keiji Kanao

发明人： Keiji Kanao

IPC分类号： F02P13/00 ,  H01T13/20 ,  H01T13/34 ,  H01T21/02

CPC分类号： H01T13/20 ,  H01T13/34

摘要： A spark plug includes a metal shell, an insulator, a center electrode, a ground electrode, and a terminal fixed to the insulator. The dimensional parameters in the structure of the spark plug, such as a maximum diameter A of the terminal and a diameter B of the insulator satisfy a dimensional relationship defined through experimental investigation. The structure facilitates an attachment of a plug cap to the spark plug.

摘要翻译： 火花塞包括金属壳，绝缘体，中心电极，接地电极和固定到绝缘体的端子。 火花塞结构中的尺寸参数，如端子的最大直径A和绝缘体的直径B满足通过实验研究定义的尺寸关系。 该结构有助于将塞帽附接到火花塞。

公开(公告)号：US06885135B2

公开(公告)日：2005-04-26

申请号：US10097929

申请日：2002-03-15

申请人： Keiji Kanao ,  Tsunenobu Hori

发明人： Keiji Kanao ,  Tsunenobu Hori

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

CPC分类号： H01T13/39 ,  H01T21/02

摘要： Noble metallic tips, made of a Pt alloy or an Ir alloy, are fixed to electrode base materials. The electrode base materials are an alloy containing a chief element selected from the group consisting of Ni, Fe, and Co and a plurality of additive elements. At least two kinds of additive elements contained in this alloy have a standard free energy of formation smaller than that of the chief element.

摘要翻译： 贵金属尖端由Pt合金或Ir合金制成，固定在电极基材上。 电极基材是含有选自Ni，Fe和Co中的主要元素和多种添加元素的合金。 该合金中所含的至少两种添加元素的形成比主要元素的标准自由能小。

公开(公告)号：US06337533B1

公开(公告)日：2002-01-08

申请号：US09324860

申请日：1999-06-03

申请人： Ken Hanashi ,  Keiji Kanao ,  Tsunetoshi Goto

发明人： Ken Hanashi ,  Keiji Kanao ,  Tsunetoshi Goto

IPC分类号： H01T1320

CPC分类号： H01T13/39 ,  H01T21/02

摘要： In a spark plug, a chip made of Ir alloy is partly buried into and bonded by laser beam welding on the ground electrode made of Ni base alloy. A molten portion is extended from the inside of the ground electrode through a junction of the chip and the electrode into the inside of the chip, but not formed on the spark discharge surface of the chip. Where A is a maximum length from the end of the junction on the side of the center electrode to the end of the molten portion on the junction on the side opposite to the center electrode, within the length A, B is a length of both ends of the molten portion, t is a length of the chip perpendicularly extending from the junction and d is a sum of the length t and a length of the molten portion protruding from the junction into the ground electrode, a ratio of A/B is not less than 0.5 and a ratio of d/t is not less than 2, but more than 4. When an end surface of the chip is the spark discharge surface, laser beam welding is conducted from the ground electrode toward a side of the other end surface or from the longitudinal side surface of the chip toward the ground electrode.

摘要翻译： 在火花塞中，由Ir合金制成的芯片通过激光束焊接部分地埋在由Ni基合金制成的接地电极上并粘合。 熔融部分从接地电极的内部延伸通过芯片和电极的接合到芯片的内部，但不形成在芯片的火花放电表面上。 其中A是从中心电极一侧的结的端部到与中心电极相对的一侧的接合处的熔融部分的端部的最大长度，在长度A内，B是两端的长度 熔融部分的t是从接合部垂直延伸的芯片的长度，d是长度t和熔融部分从接合部分向接地电极突出的长度的总和，A / B的比率不是 小于0.5，d / t的比例不小于2，但大于4.当芯片的端面是火花放电表面时，激光束焊接从接地电极朝向另一端的一侧 表面或从芯片的纵向侧表面朝向接地电极。

公开(公告)号：US07554253B2

公开(公告)日：2009-06-30

申请号：US11223930

申请日：2005-09-13

申请人： Taiji Koyama ,  Keiji Kanao

发明人： Taiji Koyama ,  Keiji Kanao

IPC分类号： H01T13/20 ,  H01T21/02 ,  H01T13/00

CPC分类号： H01T13/32 ,  H01T13/20

摘要： A spark plug for an internal combustion engine is provided which includes a metal shell, a porcelain insulator, a center electrode, a main ground electrode, and auxiliary ground electrodes. Each of the auxiliary ground electrodes has an end face facing the insulator to define an auxiliary spark gap. The end face includes an increasing-radial distance surface which is located at a distance from a longitudinal center line of the spark plug in a radial direction thereof which increases as approaching to the metal shell. The insulator nose has a wall thickness T meeting a relation of 0.3 mm≦T≦0.7 mm. This avoids a great local increase in electrical field strength on the auxiliary ground electrode to minimize excessive discharge within the auxiliary spark gap to enhance carbon fouling resistance and durability of the spark plug.

摘要翻译： 提供了一种用于内燃机的火花塞，其包括金属壳，瓷绝缘体，中心电极，主接地电极和辅助接地电极。 每个辅助接地电极具有面向绝缘体的端面以限定辅助火花隙。 端面包括一个增加径向的距离表面，该距离表面位于距离火花塞的纵向中心线一定距离处，其径向方向随着接近金属壳而增加。 绝缘体鼻具有满足0.3mm <= T <= 0.7mm的关系的壁厚T. 这避免了辅助接地电极上的电场强度的局部增大，以使辅助火花隙内的过度放电最小化，以增加火花塞的耐碳污染性和耐久性。

公开(公告)号：US07298070B2

公开(公告)日：2007-11-20

申请号：US11288398

申请日：2005-11-29

申请人： Keiji Kanao

发明人： Keiji Kanao

IPC分类号： H01T13/20

CPC分类号： H01T13/39 ,  H01T13/20

摘要： A spark plug for an internal combustion engine is provided which has a center electrode made up of an oxidation resistant alloy-made portion and a thermal conductive metal-made portion. The oxidation resistant alloy-made portion occupies at least a top portion of the center electrode exposed outside a porcelain insulator. The thermal conductive metal-made portion is exposed to a portion of an outer periphery of the center electrode which faces a insulator mount portion of a spark-mounting shell through the porcelain insulator in a direction perpendicular to an axial direction of the center electrode, thereby facilitating transfer or dispersal of heat from the center electrode to the mounting shell through the porcelain insulator to ensure a desired heat range.

摘要翻译： 提供了一种用于内燃机的火花塞，其具有由耐氧化合金制成部分和导热金属制成部分构成的中心电极。 耐氧化合金制成部分至少占据暴露在瓷绝缘体外部的中心电极的顶部。 导热金属制部分通过陶瓷绝缘体沿着与中心电极的轴向垂直的方向暴露于中心电极的外周的与火花安装壳的绝缘体安装部分相对的部分，从而 有助于通过瓷绝缘子将热量从中心电极转移或散布到安装壳体上，以确保期望的热量范围。

公开(公告)号：US07267116B2

公开(公告)日：2007-09-11

申请号：US10073255

申请日：2002-02-13

申请人： Tetsuya Miwa ,  Tohru Yoshinaga ,  Keiji Kanao ,  Shinichi Okabe

发明人： Tetsuya Miwa ,  Tohru Yoshinaga ,  Keiji Kanao ,  Shinichi Okabe

IPC分类号： H01F38/12 ,  H01F38/00

CPC分类号： H01T13/32 ,  H01T13/20 ,  H01T13/39

摘要： A power-saving type of ignition apparatus is provided with a spark plug of which electrodes (30, 40) are regulated in their shapes to lower an amount of energy required for its ignition. To face to a tip (31) of a center electrode (30) extending from a mounting bracket (10), a cylindrical protrusion (41) is built on one surface (43) of an earth electrode (40). The protrusion extends toward the center electrode to form a discharge gap (50) between the protrusion and the tip of the center electrode. Both of the tip of the center electrode and the protrusion of the earth electrode are 2.3 [mm] or less in each diameter (D1, D2), thus an amount of energy required for ignition being limited to 17 [mJ] or less.

摘要翻译： 节电型点火装置设置有火花塞，其电极（30,40）的形状被调节以降低其点火所需的能量。 为了面对从安装支架（10）延伸的中心电极（30）的尖端（31），在接地电极（40）的一个表面（43）上形成有圆筒状突起（41）。 突出部朝向中心电极延伸，以在突起和中心电极的尖端之间形成放电间隙（50）。 中心电极的尖端和接地电极的突起在每个直径（D 1，D 2）中为2.3 [mm]以下，因此点火所需的能量量限制在17 [mJ]以下 。

公开(公告)号：US20070193337A1

公开(公告)日：2007-08-23

申请号：US11707162

申请日：2007-02-16

申请人： Keiji Kanao

发明人： Keiji Kanao

IPC分类号： G01N27/00 ,  G01N27/409 ,  G01M15/10

CPC分类号： G01N27/4077

摘要： A gas sensor comprises a gas sensing element, an insulator, and a housing. The gas sensor element senses information indicative of a concentration of a specific gas to be measured and has a longitudinal direction and a radial direction perpendicular to the longitudinal direction. In the insulator, the gas sensing element is fixedly inserted. The housing has a hollow in which the insulator with the gas sensing element is inserted from an opening of hollow and has a wall portion positioned to form the opening in the longitudinal direction. The wall portion includes a caulked portion bent inward in the radial direction and has a thickness in the radial direction between an inner and an outer wall surfaces. The thickness and at least one of the inner and the outer wall surface change continuously in the longitudinal direction. In other word, the caulked portion has the holding means is accompanied by traveling a caulked force imparted by the caulked portion so as to insert the insulator into the hollow of the housing in a matter that a reaction force against the caulked force is distributed uniformly to an overall of the wall portion.

摘要翻译： 气体传感器包括气体感测元件，绝缘体和壳体。 气体传感器元件感测指示要测量的特定气体的浓度的信息，并且具有垂直于纵向方向的纵向方向和径向。 在绝缘体中，气敏元件固定插入。 壳体具有中空部，其中具有气体感测元件的绝缘体从中空的开口插入并且具有定位成在纵向方向上形成开口的壁部。 壁部包括沿径向向内弯曲的铆接部，并且在内壁面和外壁面之间具有径向厚度。 内壁和外壁表面的厚度和至少一个在纵向方向上连续变化。 换句话说，具有保持装置的铆接部分伴随着由铆接部分施加的铆接力，以将绝缘体插入到壳体的中空部中，使得抵抗铆接力的反作用力均匀地分布到 壁部分的整体。

公开(公告)号：US07250711B2

公开(公告)日：2007-07-31

申请号：US11221918

申请日：2005-09-09

申请人： Taiji Koyama ,  Keiji Kanao

发明人： Taiji Koyama ,  Keiji Kanao

IPC分类号： H01T13/20

CPC分类号： H01T13/32 ,  H01T13/20

摘要： A spark plug for an internal combustion engine is provided which includes a metal shell, a porcelain insulator, a center electrode, a main ground electrode, and auxiliary ground electrodes. Each of the auxiliary ground electrodes has an inner side surface facing the center electrode through the porcelain insulator to define an auxiliary spark gap between itself and a nose of the porcelain insulator so as to occupy a minimum distance between the porcelain insulator and the auxiliary ground electrode. This avoids a great local increase in electrical field strength on the auxiliary ground electrode to minimize excessive discharge within the auxiliary spark gap to enhance carbon fouling resistance and durability of the spark plug.

摘要翻译： 提供了一种用于内燃机的火花塞，其包括金属壳，瓷绝缘体，中心电极，主接地电极和辅助接地电极。 每个辅助接地电极具有通过瓷绝缘体面向中心电极的内侧表面，以在其与瓷绝缘体的鼻部之间限定辅助火花隙，以便占据瓷绝缘体和辅助接地电极之间的最小距离 。 这避免了辅助接地电极上的电场强度的局部增大，以使辅助火花隙内的过度放电最小化，以增加火花塞的耐碳污染性和耐久性。