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1. 发明授权

US06676468B2 Method of producing a spark plug 有权
标题翻译：火花塞的制造方法
公开(公告)号：US06676468B2
公开(公告)日：2004-01-13
申请号：US09985356
申请日：2001-11-02
申请人： Hiroya Ishiguro , Kozo Takamura , Toshikazu Shimizu
发明人： Hiroya Ishiguro , Kozo Takamura , Toshikazu Shimizu
IPC分类号： H01T2102
CPC分类号： H01T21/02
摘要： In producing a spark plug including a central electrode having a first chip including noble metal and an earth electrode having a second chip including the noble metal, a spark gap being disposed between the first and second chips, a chip including the noble metal. The chip is welded to an end of the central electrode and to an end of the earth electrode. The welded chip is cut to form the first and second chips and the spark gap.
摘要翻译：在制造包括具有包括贵金属的第一芯片的中心电极和具有包括贵金属的第二芯片的接地电极的火花塞时，设置在第一和第二芯片之间的火花隙，包括贵金属的芯片。该芯片焊接到中心电极的一端和接地电极的端部。焊接的芯片被切割以形成第一和第二芯片和火花隙。

2. 发明授权

US5406166A Long life spark plug having consumable discharge member 失效
标题翻译：长寿命火花塞具有消耗性排放构件
公开(公告)号：US5406166A
公开(公告)日：1995-04-11
申请号：US951199
申请日：1992-09-28
申请人： Nobuo Abe , Kozo Takamura , Akio Katoh
发明人： Nobuo Abe , Kozo Takamura , Akio Katoh
IPC分类号： H01T13/20 , H01T13/39 , H01T21/02
CPC分类号： H01T21/02 , H01T13/39
摘要： There is disclosed a spark plug which can maintain a low spark voltage for a long period of time even if a noble metal tip is used in a small amount. A discharge gap is formed between a central electrode and an earth electrode. The noble metal tip is formed on that end face of the central electrode facing the earth electrode. A cross-shaped groove is formed in that end face of the noble metal tip joined to the central electrode. The cross-shaped groove is exposed when the noble metal tip is consumed by a discharge developing in the discharge gap.
摘要翻译：公开了即使使用少量贵金属电极头也能够长时间保持低火花电压的火花塞。在中心电极和接地电极之间形成放电间隙。贵金属端头形成在面对接地电极的中心电极的端面上。在与中心电极连接的贵金属电极头的端面上形成十字形槽。当贵金属尖端在放电间隙中由放电显影消耗时，十字形槽被暴露。

3. 发明申请

US20050040039A1 Structure of gas sensor ensuring stability of electrical joint 审中-公开
标题翻译：确保电气接头稳定性的气体传感器结构
公开(公告)号：US20050040039A1
公开(公告)日：2005-02-24
申请号：US10923006
申请日：2004-08-23
申请人： Takashi Kojima , Kozo Takamura
发明人： Takashi Kojima , Kozo Takamura
IPC分类号： G01N27/409 , G01N27/26 , G01N27/28 , G01N27/403 , G01N27/407 , G01N27/416 , H05B3/03 , H05B3/08
CPC分类号： G01N27/4071
摘要： An improved structure of a gas sensor is provided which is designed to ensure the reliability of electrical joints between a ceramic heater disposed in a sensor element and connector terminals for supplying electric power to the heater. The connector terminals are joined to lead wires extending outside the gas sensor to a power source. The connector terminals are elastically deformable and fitted on power supply electrodes affixed to the heater to establish electric contacts therebewteen without use of a brazing material. This permits the connector terminals and the power supply electrodes to thermally expand independently of each other when subjected to intense heat, thus resulting in almost no thermal stress on the electric contacts, which ensures the reliability of such contacts in high temperature environments.
摘要翻译：提供了一种气体传感器的改进结构，其被设计成确保设置在传感器元件中的陶瓷加热器与用于向加热器供电的连接器端子之间的电接头的可靠性。连接器端子与延伸到气体传感器外部的导线连接到电源。连接器端子可弹性变形并且安装在固定到加热器的电源电极上，以在不使用钎焊材料的情况下建立电触点。这允许连接器端子和电源电极在受到强烈的热量时彼此独立地热膨胀，从而导致电触头几乎没有热应力，这确保了这种接触在高温环境中的可靠性。

4. 发明授权

US5056496A Ignition system of multispark type 失效
标题翻译：多类型点火系统
公开(公告)号：US5056496A
公开(公告)日：1991-10-15
申请号：US492472
申请日：1990-03-12
申请人： Seiji Morino , Yasuhito Takasu , Kozo Takamura , Masato Somiya
发明人： Seiji Morino , Yasuhito Takasu , Kozo Takamura , Masato Somiya
IPC分类号： F02P3/08 , F02P15/10
CPC分类号： F02P15/10 , F02P3/0884 , F02P3/0876
摘要： An ignition system of multispark type having an ignitability superior to that of a combination an ignition system of capacitor discharge type and a multispark system is disclosed. A first control signal is generated for turning on a first switching device a predetermined time before an ignition timing to store energy in an energy storage coil and turning off the first switching device at the ignition timing. A multispark control signal is generated for turning on a second switching device from the ignition timing and turning on and off the first and second switching devices alternately for a predetermined spark period. A second control signal is generated for turning on the first switching device upon the turning off of the second switching device to store energy in the energy storage coil and then turning off the first switching device to charge a capacitor with the energy stored in the energy storage coil.

5. 发明授权

US4845400A Spark plug for internal-combustion engine 失效
标题翻译：内燃机火花塞
公开(公告)号：US4845400A
公开(公告)日：1989-07-04
申请号：US182154
申请日：1988-04-15
申请人： Kozo Takamura , Hiroyuki Murai , Yasuyuki Sato
发明人： Kozo Takamura , Hiroyuki Murai , Yasuyuki Sato
IPC分类号： H01T13/14 , H01T13/20
CPC分类号： H01T13/20 , H01T13/14
摘要： A spark plug for an automotive internal combustion engine providing improved ignition even when carbon is deposited on the insulator of the plug. A rich fuel-air ratio causes carbon to be deposited on spark plug insulators, thereby decreasing its effective insulation. By limiting the geometrical dimension of the plug's center electrode, ground electrode, and insulator the problem of carbon build-up is overcome. The sizes of these elements have certain allowable ranges that enhance the igniting effect of the plug.

6. 发明授权

US5557158A Spark plug and method of producing the same 失效
标题翻译：火花塞及其制作方法
公开(公告)号：US5557158A
公开(公告)日：1996-09-17
申请号：US260792
申请日：1994-06-16
申请人： Keiji Kanao , Kozo Takamura
发明人： Keiji Kanao , Kozo Takamura
IPC分类号： F02B75/02 , H01T13/39 , H01T21/02 , H01T13/20 , H01J13/56 , H01T13/22
CPC分类号： H01T13/39 , H01T21/02 , F02B2075/027
摘要： A spark plug which realizes reliability against thermal stress even in a case where dissimilar noble metal materials are disposed on the tip portion of the center electrode opposing the ground electrode and which realizes improved productivity while assuring durable reliability. The spark plug includes a center electrode electrically insulated from a housing and having a small-diameter portion at a tip portion which has a diameter smaller than that of a main body of the center electrode and composed of similar kinds of material as the center electrode, and a round-shape material, which is formed into a cylindrical or a ring shape, composed of dissimilar metal material. The round-shape material is fitted to the small-diameter portion of the center electrode so as to form a minute clearance between an inner surface of the round-shape material and is fixed to the center electrode by a large diameter portion which is integrally formed on a tip portion of the center electrode such that the minute clearance is kept between the round-shape material and the center electrode.
摘要翻译：即使在与接地电极相对的中心电极的前端部配置有异种的贵金属材料的情况下也实现热应力的可靠性的火花塞，其实现了提高的生产率，同时确保了耐用的可靠性。火花塞包括与壳体电绝缘的中心电极，在尖端部具有比中心电极的主体的直径小的直径部分，并且由与中心电极类似的材料构成的小直径部分，以及由异种金属材料构成的圆筒状或环状的圆形材料。将圆形材料装配到中心电极的小直径部分上，以便在圆形材料的内表面之间形成微小间隙，并通过一体形成的大直径部分固定到中心电极在中心电极的尖端部分上，使得在圆形材料和中心电极之间保持微小的间隙。

7. 发明授权

US5502352A Spark plug having horizontal discharge 失效
标题翻译：火花塞具有水平放电
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。

8. 发明授权

US5488262A Spark electrode having low thermal stress 失效
标题翻译：具有低热应力的火花电极
公开(公告)号：US5488262A
公开(公告)日：1996-01-30
申请号：US987951
申请日：1992-12-11
申请人： Kozo Takamura
发明人： Kozo Takamura
IPC分类号： H01T13/20 , H01T13/39 , H01T21/02
CPC分类号： H01T21/02 , H01T13/39
摘要： A spark discharge tip, such as for a spark plug for an internal combustion engine in which the life of the tip is prolonged. A composite material is formed by bonding a material for a discharge layer, mainly composed of platinum, to a material for a thermal stress relieving layer, which is an alloy mainly composed of platinum, and having a coefficient of thermal expansion between that of the electrode and that of the discharge layer. A composite tip is formed by stamping the composite material into a columnar shape from the discharge layer side so that the periphery of the interface between the discharge layer and stress relieving layer is covered by the discharge layer. The composite tip is then resistance welded to the electrode.
摘要翻译：火花放电尖端，例如用于内燃机的火花塞，其中尖端的寿命延长。复合材料通过将主要由铂组成的放电层用材料与主要由铂组成的合金作为热应力消除层的材料进行接合而形成，并且其电极的热膨胀系数和放电层。通过将复合材料从放电层侧冲压成柱状形成复合顶端，使得放电层和应力消除层之间的界面的周边被放电层覆盖。然后将复合尖端电阻焊接到电极。

9. 发明授权

US5202601A Spark plug for internal combustion engine with recess in electrode tip 失效
标题翻译：用于内部燃烧发动机的火花塞，带有电极提示
公开(公告)号：US5202601A
公开(公告)日：1993-04-13
申请号：US634351
申请日：1990-12-26
申请人： Kozo Takamura , Yasuyuki Sato , Kiyoaki Tanaka
发明人： Kozo Takamura , Yasuyuki Sato , Kiyoaki Tanaka
IPC分类号： F02B1/04 , H01T13/39
CPC分类号： H01T13/39 , F02B1/04
摘要： A spark plug for use in an internal combustion engine comprises a central electrode made of a base metal and an earth electrode. A tip portion is provided on the central electrode. The tip portion includes a noble metal tip layer for defining a spark discharge gap between the noble metal tip layer and the earth electrode, and an alloy layer provided between the noble metal tip layer and the central electrode. The tip portion is provided with grooves to be divided into a plurality of sections. The tip portion has an outer peripheral wall flared towards the earth electrode, and a width of the grooves gradually increases from a bottom thereof to a surface of the noble metal tip layer for defining the spark discharge gap.

10. 发明授权

US4581558A Spark plug for internal combustion engines having an alloy layer between the electrodes and tip ends 失效
标题翻译：用于在电极和末端之间具有合金层的内燃机的火花塞
公开(公告)号：US4581558A
公开(公告)日：1986-04-08
申请号：US450801
申请日：1982-12-17
申请人： Kozo Takamura , Yasuyuki Sato , Kanji Higuchi
发明人： Kozo Takamura , Yasuyuki Sato , Kanji Higuchi
IPC分类号： F02B75/02 , H01T13/20 , H01T13/32 , H01T13/39
CPC分类号： H01T13/32 , H01T13/20 , H01T13/39 , F02B2075/027
摘要： A spark plug for an internal combustion engine including a center electrode, an earth electrode, a metal tip joined by welding to an ignition section of at least one of the center electrode and the earth electrode, and an alloy layer located at a welding portion between the metal tip and the at least one electrode. The metal tip is formed of material highly resistant to heat and wear which is distinct in the coefficient of thermal expansion from the material of the electrodes. The alloy layer is formed to have a thickness of at least about 10.mu., so as to avoid the rupture of the metal tip along the surface thereof adjacent to the welding portion.
摘要翻译：一种用于内燃机的火花塞，其包括中心电极，接地电极，通过焊接连接到中心电极和接地电极中的至少一个的点火部分的金属端头以及位于焊接部分之间的合金层金属尖端和至少一个电极。金属尖端由耐高温和耐磨性的材料形成，其热膨胀系数与电极的材料不同。合金层形成为具有至少约10微米的厚度，以避免金属末端沿其邻近焊接部分的表面破裂。

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