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公开(公告)号：US5793151A
公开(公告)日：1998-08-11
申请号：US717454
申请日：1996-09-20
申请人： Junichi Kagawa , Kozo Amano , Yoshihiro Matsubara
发明人： Junichi Kagawa , Kozo Amano , Yoshihiro Matsubara
CPC分类号： H01T13/52 , F02B2075/027
摘要： A spark plug in use for an internal combustion engine, includes an insulator placed in a metal shell in a manner to extend its front end beyond the metal shell, a center electrode is placed within an axial bore provided by the insulator, an outer electrode which is welded to a front end of the metal shell is so bent that a firing end of the outer electrode faces a front end of the insulator with a space therebetween to cause surface-spark discharges along a front end surface of the insulator and to cause a semi-surface spark discharge between the center electrode and the outer electrode, the front end of the center electrode is protroacted from a front end of the insulator by at most than 0.5 mm or retracted from the front end of the insulator by at most than 1.0 mm, and the firing end of the outer electrode is in line with the front end surface of the insulator, thereby optimizing a carbon-deposit cleaning performance of the spark plug with the semi-surface spark discharge, according to the invention. In addition, a firing end portion of the center electrode has a slender noble metal tip in a preferred embodiment of the spark plugs of the invention.
摘要翻译： 用于内燃机的火花塞包括以将其前端延伸超过金属壳的方式设置在金属壳体中的绝缘体，将中心电极放置在由绝缘体提供的轴向孔内，外电极 被焊接到金属外壳的前端如此弯曲，使得外电极的点火端面与绝缘体的前端之间具有间隔，从而沿着绝缘体的前端表面引起表面火花放电，并引起 在中心电极和外部电极之间的半表面火花放电，中心电极的前端从绝缘体的前端突出多达0.5mm或从绝缘体的前端缩回至多1.0 mm，并且外电极的点火端与绝缘体的前端面一致，从而优化具有半表面火花放电的火花塞的碳沉积清洗性能，根据 涉及本发明。 此外，在本发明的火花塞的优选实施例中，中心电极的烧制端部具有细长的贵金属端头。
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公开(公告)号：US4881403A
公开(公告)日：1989-11-21
申请号：US234214
申请日：1988-08-19
申请人： Junichi Kagawa , Yoshiaki Saiki , Kozo Amano
发明人： Junichi Kagawa , Yoshiaki Saiki , Kozo Amano
摘要： A spark plug with pressure sensor comprising; a center electrode having a high voltage terminal; an insulator provided around said center electrode to securely support it; a tubular metallic shell provided to support said insulator at its inner side; a pressure sensor having a piezoelectrical element at least enclosed by a casing of a metallic hollow ring; the metallic shell having a diameter-increased portion and a diameter-reduced portion; the casing of the sensor being inserted into the diameter-reduced portion with an inner side of the casing tightly engaging the outer side of the diameter-reduced portion; a mount means having a ring portion and a flange portion; the ring portion tightly inserted into the diameter-reduced portion while the flange portion tightly sandwiching the casing with a step between the diameter-reduced portion and the diameter-increased portion; and the ring portion being welded to said diameter-reduced portion to maintain air-tight relationship between an innerside of the ring portion and outer side of the diameter-reduced portion.
摘要翻译： 一种具有压力传感器的火花塞，包括： 具有高电压端子的中心电极; 围绕所述中心电极设置的绝缘体，以牢固地支撑所述中心电极; 设置成在其内侧支撑所述绝缘体的管状金属壳; 压力传感器，其具有至少由金属中空环的壳体封闭的压电元件; 所述金属壳具有直径增加部分和直径减小部分; 所述传感器的外壳被插入所述直径减小部分中，所述壳体的内侧与所述直径减小部分的外侧紧密接合; 具有环部和凸缘部的安装装置; 所述环部分紧密地插入所述直径减小部分中，同时所述凸缘部分在所述直径减小部分和所述直径增加部分之间的台阶上紧密地夹住所述壳体; 并且所述环部分被焊接到所述直径减小部分，以保持所述环部分的内侧和所述直径减小部分的外侧之间的气密关系。
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公开(公告)号：US5347855A
公开(公告)日：1994-09-20
申请号：US29235
申请日：1993-03-10
CPC分类号： H01T13/467 , F02P17/12 , F02P2017/121 , F02P2017/123 , F02P2017/125
摘要： In a misfire detector device for use in internal combustion engine, an electrical interrupter circuit on-off actuates a primary current flowing through a primary circuit of an ignition coil to induce a sparkplug voltage which is applied to a multi-electrode type spark plug. A check diode or a series gap is provided in a secondary circuit of the ignition coil so as to prevent a current flowing back to the ignition coil. A sparkplug voltage detector circuit detects an attenuation time length of a sparkplug voltage waveform presented subsequent to a predetermined time period after an end of a spark action of the spark plug. On the basis of the attenuation time length, a distinction circuit determines whether a misfire occurs in a cylinder of an internal combustion engine.
摘要翻译： 在用于内燃机的失火检测装置中，电断路器电路开关致动流过点火线圈的初级电路的初级电流，以引起施加到多电极型火花塞的火花塞电压。 在点火线圈的次级电路中设置校验二极管或串联间隙，以防止电流回流到点火线圈。 火花塞电压检测器电路检测在火花塞的火花动作结束之后的预定时间段之后呈现的火花塞电压波形的衰减时间长度。 基于衰减时间长度，区分电路确定在内燃机的气缸中是否发生失火。
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公开(公告)号：US5347856A
公开(公告)日：1994-09-20
申请号：US25346
申请日：1993-03-03
CPC分类号： F02P17/12 , H01T13/39 , F02P2017/121 , F02P2017/123 , F02P2017/125
摘要： In a misfire detector device for use in internal combustion engine, an electrical interrupter circuit on-off actuates a primary current flowing through a primary circuit of an ignition coil to induce a spark plug voltage. A check diode is provided in a secondary circuit of the ignition coil to prevent a current flowing back to the ignition coil. The spark plug has a center electrode, a front end of which is projected from an insulator, and an outer surface area of the projected front end being 25 mm.sup.2 or more. A spark plug voltage detector circuit detects an attenuation time length of a spark plug voltage waveform presented subsequent to a predetermined time period occurring after an end of a spark action of the spark plug. On the basis of the attenuation time length, a distinction circuit determines whether a misfire occurs in a cylinder of an internal combustion engine.
摘要翻译： 在用于内燃机的失火检测器装置中，断电器电路断开致动流过点火线圈的初级电路的初级电流以引起火花塞电压。 在点火线圈的次级电路中提供检查二极管，以防止电流回流到点火线圈。 火花塞具有中心电极，其前端从绝缘体突出，并且突出的前端的外表面区域为25mm 2以上。 火花塞电压检测器电路检测在火花塞的火花动作结束之后发生的预定时间段之后呈现的火花塞电压波形的衰减时间长度。 基于衰减时间长度，区分电路确定在内燃机的气缸中是否发生失火。
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5.发明授权Electrode for a spark plug in which a firing tip is laser welded to a front end thereof 失效用于火花塞的电极，其中点火头被激光焊接到其前端
公开(公告)号：US5461276A
公开(公告)日：1995-10-24
申请号：US371577
申请日：1995-01-12
申请人： Wataru Matsutani , Junichi Kagawa
发明人： Wataru Matsutani , Junichi Kagawa
摘要： In an electrode for a spark plug, an elongated blank metal is made of a nickel-based alloy and including a front surface. A firing tip is provided from a slug made of a noble metal, the slug being concentrically placed on the front surface of the elongated blank metal and laser beam welded to thermally melt the entire slug and thereby produce a thermal weld, so that the front surface of the elongated blank metal is partly fused together with the slug to form a melted portion with the front surface and the slug so as to contain the front surface within the melted portion in the range of 0.5 wt % to 80.0 wt %.
摘要翻译： 在用于火花塞的电极中，细长的坯料由镍基合金制成并且包括前表面。 从由贵金属制成的芯块提供击发尖端，该芯块被同心地放置在细长的坯料金属的前表面上，焊接的激光束热熔融整个芯块，从而产生热焊接，从而使前表面 细长的空白金属部分地与块状地熔合在一起，以与前表面和块状物形成熔融部分，以便将熔融部分内的前表面包含在0.5重量％至80.0重量％的范围内。
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公开(公告)号：US5461210A
公开(公告)日：1995-10-24
申请号：US265003
申请日：1994-06-24
申请人： Wataru Matsutani , Junichi Kagawa
发明人： Wataru Matsutani , Junichi Kagawa
摘要： A method of manufacturing a spark plug electrode, wherein a composite column is provided to have a heat-conductor core embedded in a metallic clad by means of extrusion. A firing tip is provided from a slug which is made of a noble metal. The slug is concentrically placed on an end surface of the metallic clad, and a laser beam welding is applied on the slug to thermally melt the entire the slug so that the end surface of the metallic clad is partly fused into the slug in the range of 0.5 wt % to 80.0 wt %.
摘要翻译： 一种制造火花塞电极的方法，其中复合柱被设置成通过挤出将热导体芯嵌入金属包层中。 从由贵金属制成的块状物提供点火尖。 将芯块同心地放置在金属包层的端面上，并且将激光束焊接施加到芯块上以使整个芯块热熔融，使得金属覆层的端表面部分地熔合到芯块的范围内 0.5重量％〜80.0重量％。
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公开(公告)号：US4814665A
公开(公告)日：1989-03-21
申请号：US096042
申请日：1987-09-11
申请人： Akio Sakura , Mitsutaka Yoshida , Junichi Kagawa
发明人： Akio Sakura , Mitsutaka Yoshida , Junichi Kagawa
CPC分类号： H01T13/39
摘要： In a center electrode structure for spark plug including a tubular insulator, the inner side of which has a stepped shoulder to provide a diameter-reduced bore therein; a center electrode having a flange, and concentrically placed into the insulator with the flange engaging against the shoulder, and with one end being axially through the bore so as to be exposed to outside of the insulator; the center electrode having a highly heat conductive core of copper or copper-based alloy which is encased into an enclosure made of oxidation and heat resistant nickel-based alloy; and the core providing its overall outer surface with a thin oxidation layer, so that the core is clad with the enclosure through the oxidation layer by means of extrusion.
摘要翻译： 在包括管状绝缘体的火花塞的中心电极结构中，其内侧具有阶梯状肩部以在其中提供直径减小的孔; 具有凸缘的中心电极，并且同心地放置在所述绝缘体中，所述凸缘与所述肩部接合，并且一端轴向地穿过所述孔，以暴露于所述绝缘体的外部; 中心电极具有铜或铜基合金的高导热性芯，该铜或铜基合金被封装在由氧化和耐热的镍基合金制成的外壳中; 并且芯为其整个外表面提供薄的氧化层，使得芯通过挤压通过氧化层与外壳包层。
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公开(公告)号：US4659960A
公开(公告)日：1987-04-21
申请号：US731942
申请日：1985-05-08
申请人： Akihiro Toya , Junichi Kagawa , Kazunori Yokota , Hiroaki Mori
发明人： Akihiro Toya , Junichi Kagawa , Kazunori Yokota , Hiroaki Mori
CPC分类号： H01T13/39
摘要： A spark plug having a center electrode comprises a ceramic insulator whose leg portion is shaped at the tip in a bag form so as to close the insulator bore. A firing tip is provided at the bag-shaped tip in a face-to-face relation with a side electrode by fixing an electrode element made of a sinter of a ceramic powder containing particles of a size between 10 and 200 .mu.m which are coated with a noble metal to a thickness of 0.1-20 .mu.m. An electrode axis extends from the top end of the plug and is inserted through the insulator bore.
摘要翻译： 具有中心电极的火花塞包括陶瓷绝缘体，该绝缘体的腿部以尖端形成袋形，以封闭绝缘体孔。 通过将包含尺寸在10-200μm之间的陶瓷粉末的烧结体的电极元件固定在涂覆有电极的位置处，在袋形尖端处与侧面电极以面对面的关系设置点火尖 贵金属的厚度为0.1-20μm。 电极轴线从插头的顶端延伸并插入穿过绝缘体孔。
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公开(公告)号：US5866973A
公开(公告)日：1999-02-02
申请号：US915063
申请日：1997-08-20
申请人： Junichi Kagawa , Wataru Matsutani
发明人： Junichi Kagawa , Wataru Matsutani
CPC分类号： H01T13/39
摘要： A spark plug is provided having a center electrode disposed in a metallic shell through an insulator so that the front end of the center electrode forms a spark gap with an outer electrode. A platinum tip is secured to the outer electrode positioned to oppose the front end of the center electrode. The outer electrode is provided with a heat-conductive core metal cladded with a matrix metal which is made of a nickel-based alloy containing 10-20 wt. % chromium. The platinum tip is welded to the outer electrode to form a welded portion between the platinum tip and the outer electrode and the platinum tip is positioned to terminate slightly short of the core metal so that the distance between a circumferential edge of the welded portion and a front end of the core metal is in the range 0.0 mm-2.0 mm measured lengthwise along direction the outer electrode.
摘要翻译： 提供火花塞，其具有通过绝缘体设置在金属壳体中的中心电极，使得中心电极的前端与外部电极形成火花隙。 铂尖被固定到与中心电极的前端相对定位的外电极。 外部电极设置有由基体金属包覆的导热芯金属，该基体金属由含有10-20重量％的镍基合金制成。 ％铬。 将铂尖焊接到外电极，以形成铂尖端和外电极之间的焊接部分，并且铂尖端被定位成稍微短于芯金属，使得焊接部分的周边边缘与 核心金属的前端在沿着外部电极的方向上沿长度方向测量的0.0mm-2.0mm的范围内。
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公开(公告)号：US5793793A
公开(公告)日：1998-08-11
申请号：US883145
申请日：1997-06-27
申请人： Wataru Matsutani , Junichi Kagawa
发明人： Wataru Matsutani , Junichi Kagawa
CPC分类号： H01T13/39
摘要： Spark plug has a central electrode, an insulator provided exterior to the central electrode, main metallic shell provided exterior to the insulator in such a way that the central electrode protrudes from one end, and a ground electrode coupled at one end to the main metallic shell and which has the other end disposed to face the central electrode 3, with a chip being secured to either the central electrode or the ground electrode or both to form spark discharge gap g. The chip is made of a metal based on Ir which contains Rh in an amount ranging from 3 to 50 wt % (50 wt % being not inclusive).
摘要翻译： 火花塞具有中心电极，设置在中心电极外部的绝缘体，主金属外壳设置在绝缘体的外部，使得中心电极从一端突出，并且接地电极在一端连接到主金属外壳 并且其另一端设置为面对中心电极3，其中芯片固定到中心电极或接地电极或两者以形成火花放电间隙g。 该芯片由含有3〜50重量％（不包括50重量％）量的Rh的基于Ir的金属制成。
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