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1. 发明申请

US20070228916A1 Spark plug for internal combustion engine 有权
标题翻译：内燃机火花塞
公开(公告)号：US20070228916A1
公开(公告)日：2007-10-04
申请号：US11730172
申请日：2007-03-29
申请人： Iwao Kunitomo , Yoshihiro Matsubara , Hironobu Mizutani
发明人： Iwao Kunitomo , Yoshihiro Matsubara , Hironobu Mizutani
IPC分类号： H01T13/20
CPC分类号： H01T13/467 , H01T13/32 , H01T13/39 , H01T13/52
摘要： A spark plug including: a cylindrical insulator having an axial hole extending through the insulator in an axial direction; a center electrode inserted in the axial hole; a metal shell provided around an outer periphery of the insulator and having a leading end surface, from which a leading end surface of the insulator protrudes; a ground electrode having a base end bonded to the leading end surface of the metal shell; and a noble metal tip disposed on a distal end of the ground electrode, an end of the noble metal tip protruding toward the center electrode in a radial direction, wherein: the spark plug forming a spark discharge path upon application of a discharging voltage between the protruding end of the noble metal tip and an end of the center electrode, the spark discharge path including an aerial discharge gap between a part of the protruding end of the noble metal tip and a part of the end of the insulator and a surface-creeping discharge path beginning at a part of the end of the insulator and a part of the center electrode and extending along the end surface of the insulator; and the noble metal tip protruding from the leading end of the ground electrode by a protruding length of more than 0.2 mm.
摘要翻译：一种火花塞，包括：具有沿轴向延伸穿过绝缘体的轴向孔的圆柱形绝缘体; 插入所述轴向孔中的中心电极; 金属壳体，设置在所述绝缘体的外周的周围，并具有前端面，所述绝缘子的前端表面从所述前端表面突出; 接地电极，其具有接合到所述金属壳的前端表面的基端; 以及设置在所述接地电极的前端的贵金属电极头，所述贵金属电极头端部沿着径向突出于所述中心电极，其特征在于，所述火花塞在形成所述火花放电路径之间，贵金属端头的突出端和中心电极的端部，火花放电路径包括在贵金属电极头的突出端的一部分和绝缘子的端部的一部分之间的空气放电间隙，以及表面爬行从所述绝缘体的端部的一部分开始的放电路径和所述中心电极的一部分并且沿着所述绝缘体的端面延伸; 所述贵金属电极头从所述接地电极的前端突出大于0.2mm的突出长度。

2. 发明授权

US07663296B2 Spark plug for internal combustion engine 有权
标题翻译：内燃机火花塞
公开(公告)号：US07663296B2
公开(公告)日：2010-02-16
申请号：US11730172
申请日：2007-03-29
申请人： Iwao Kunitomo , Yoshihiro Matsubara , Hironobu Mizutani
发明人： Iwao Kunitomo , Yoshihiro Matsubara , Hironobu Mizutani
IPC分类号： H01T13/20
CPC分类号： H01T13/467 , H01T13/32 , H01T13/39 , H01T13/52
摘要： A spark plug including: a cylindrical insulator having an axial hole extending through the insulator in an axial direction; a center electrode inserted in the axial hole; a metal shell provided around an outer periphery of the insulator and having a leading end surface, from which a leading end surface of the insulator protrudes; a ground electrode having a base end bonded to the leading end surface of the metal shell; and a noble metal tip disposed on a distal end of the ground electrode, an end of the noble metal tip protruding toward the center electrode in a radial direction, wherein: the spark plug forming a spark discharge path upon application of a discharging voltage between the protruding end of the noble metal tip and an end of the center electrode, the spark discharge path including an aerial discharge gap between a part of the protruding end of the noble metal tip and a part of the end of the insulator and a surface-creeping discharge path beginning at a part of the end of the insulator and a part of the center electrode and extending along the end surface of the insulator; and the noble metal tip protruding from the leading end of the ground electrode by a protruding length of more than 0.2 mm.
摘要翻译：一种火花塞，包括：圆柱形绝缘体，具有沿轴向延伸穿过绝缘体的轴向孔; 插入所述轴向孔中的中心电极; 金属壳体，设置在所述绝缘体的外周的周围，并具有前端面，所述绝缘子的前端表面从所述前端表面突出; 接地电极，其具有接合到所述金属壳的前端表面的基端; 以及设置在所述接地电极的前端的贵金属电极头，所述贵金属电极头端部沿着径向突出于所述中心电极，其特征在于，所述火花塞在形成所述火花放电路径之间，贵金属端头的突出端和中心电极的端部，火花放电路径包括在贵金属电极头的突出端的一部分和绝缘子的端部的一部分之间的空气放电间隙，以及表面爬行从所述绝缘体的端部的一部分开始的放电路径和所述中心电极的一部分并且沿着所述绝缘体的端面延伸; 所述贵金属电极头从所述接地电极的前端突出大于0.2mm的突出长度。

3. 发明授权

US5680002A Multi-polarity type spark plug for use in an internal combustion engine 失效
标题翻译：用于内燃机的多极型火花塞
公开(公告)号：US5680002A
公开(公告)日：1997-10-21
申请号：US592693
申请日：1996-01-26
申请人： Iwao Kunitomo , Yoshihiro Matsubara , Kozo Amano
发明人： Iwao Kunitomo , Yoshihiro Matsubara , Kozo Amano
IPC分类号： H01T13/32 , H01T13/46 , H01T13/20
CPC分类号： H01T13/467
摘要： In a multi-polarity type spark plug for an internal combustion engine, a tubular insulator is supported within a cylindrical metallic shell through which a spark plug is to be attached to an internal combustion engine. A center electrode is placed within the insulator, a front end of the center electrode being directed toward a combustion chamber of the internal combustion engine from a front end of the metallic shell so as to extend beyond a front end of the insulator. First and second ground electrodes are each connected to the front end of the metallic shell, the first ground electrode forming a first vertical spark gap with a front end surface of the center electrode which directly opposes an elevational side of the center electrode, and the second ground electrode forming a second horizontal spark gap with an elevational side of the center electrode. An angle .theta.a is limited as 60.degree..ltoreq..theta.a .ltoreq.150.degree. in which the angle .theta.a is taken when the first ground electrode forms against the second ground electrode with the center electrode as an axial center.
摘要翻译：在用于内燃机的多极型火花塞中，管状绝缘体被支撑在圆筒形的金属外壳内，火花塞将通过该外壳连接到内燃机。中心电极放置在绝缘体内，中心电极的前端从金属壳的前端引导到内燃机的燃烧室，以便延伸超过绝缘体的前端。第一接地电极和第二接地电极各自连接到金属壳体的前端，第一接地电极形成第一垂直火花隙，其中心电极的前端表面与中心电极的正面相对，第二接地电极接地电极与中心电极的正面形成第二水平火花间隙。角度θ被限制为60°θ<150°，其中当第一接地电极与中心电极作为轴向中心与第二接地电极形成时，取得角度θa。

4. 发明授权

US5831377A Spark plug in use for an internal combustion engine 失效
标题翻译：用于内燃机的火花塞
公开(公告)号：US5831377A
公开(公告)日：1998-11-03
申请号：US800019
申请日：1997-02-13
申请人： Yoshihiro Matsubara , Iwao Kunitomo , Wataru Matsutani
发明人： Yoshihiro Matsubara , Iwao Kunitomo , Wataru Matsutani
IPC分类号： H01T13/20 , F02M57/06 , F02P13/00 , H01T13/00
CPC分类号： H01T13/20
摘要： In a spark plug including a cylindrical metal shell whose inner wall has a ledge portion, an insulator having a seat portion which engages with a rear slope surface of the ledge portion to be supported within the metal shell, a center electrode supported with an axial bore of the insulator, and a ground electrode extended from the metal shell to form a spark gap with the center electrode. A dimensional relationship among (A), (B) and (g) is defined as follows: {(B-A)/2}.gtoreq.0.8.times.(g) or {(B-A)/2}.gtoreq.0.9.times.(g). Where B (mm) is an inner diameter of a metal shell portion which surrounds an insulator nose, A (mm) is a base diameter of the insulator nose, and g (mm) is a width dimension of the spark gap.
摘要翻译：在包括其内壁具有凸缘部分的圆柱形金属壳的火花塞中，具有与所述凸缘部的后倾斜表面接合以支撑在所述金属壳内的座部的绝缘体，支撑在所述金属壳内的中心电极，的绝缘体，以及从金属壳延伸的接地电极，与中心电极形成火花隙。（A），（B）和（g）之间的尺寸关系定义如下：{（BA）/ 2}> / = 0.8x（g）或{（BA）/ 2}> / = 0.9x ）。其中B（mm）是围绕绝缘体鼻部的金属壳部分的内径，A（mm）是绝缘子鼻的基部直径，g（mm）是火花隙的宽度尺寸。

5. 发明申请

US20090194053A1 PLASMA JET IGNITION PLUG 有权
标题翻译：等离子喷射点火插头
公开(公告)号：US20090194053A1
公开(公告)日：2009-08-06
申请号：US12366094
申请日：2009-02-05
申请人： Toru Nakamura , Yuichi Yamada , Iwao Kunitomo , Yoshikuni Sato , Daisuke Nakano
发明人： Toru Nakamura , Yuichi Yamada , Iwao Kunitomo , Yoshikuni Sato , Daisuke Nakano
IPC分类号： F02B19/00
CPC分类号： H01T13/50 , H01T13/32
摘要： A plasma jet ignition plug capable of inhibiting occurrence of channeling while reducing removal of energy of plasma through a ground electrode at the time of emission of plasma. A ground electrode of a plasma jet ignition plug projects inward from a front end face of a metallic shell toward an opening end of a cavity which is open at a front end face of an insulator. A projecting distal end which forms a spark discharge gap between the same and a center electrode within a cavity is located inward, with respect to a diametral direction P orthogonal to an axis O, of a position which is located 0.5 mm radially outward from the opening end of the cavity.
摘要翻译：一种等离子喷射火花塞，其能够抑制发射通道，同时在发射等离子体时减少通过接地电极去除等离子体的能量。等离子喷射火花塞的接地电极从金属壳的前端面朝向在绝缘体的前端面开口的空腔的开口端向内突出。在腔内形成火花放电间隙的突出的远端相对于与轴线O垂直的直径方向P位于距开口径向向外0.5mm的位置的内侧腔的末端。

6. 发明授权

US09000658B2 Spark plug for internal combustion engine 有权
标题翻译：内燃机火花塞
公开(公告)号：US09000658B2
公开(公告)日：2015-04-07
申请号：US12937231
申请日：2009-04-03
申请人： Iwao Kunitomo , Kenji Ban
发明人： Iwao Kunitomo , Kenji Ban
IPC分类号： H01T13/32 , H01T13/20
CPC分类号： H01T13/32 , H01T13/20
摘要： A spark plug in which a front end portion of a ground electrode is positioned outside of a virtual outer circumferential face that is formed by extending a front and outer circumferential face of a center electrode in the axis direction, and positioned on a front end side in the axis direction with respect to a virtual face including a front end face of the center electrode. Further, the equation 1.1≦b/a≦1.6 is satisfied, where “a” (mm) represents a first minimal distance between the front end portion of the center electrode and the front end portion of the ground electrode and, where “b” (mm) represents a second minimal distance between the front end portion of a ceramic insulator and the front end portion of the ground electrode.
摘要翻译：一种火花塞，其中接地电极的前端部位于通过使中心电极的前外周面沿轴向延伸而形成的假想外周面的外侧，位于前端侧相对于包括中心电极的前端面的虚拟面的轴方向。此外，满足方程式1.1＆nlE; b / a＆nlE; 1.6，其中“a”（mm）表示中心电极的前端部分和接地电极的前端部分之间的第一最小距离，并且其中“b “（mm）表示陶瓷绝缘体的前端部和接地电极的前端部之间的第二最小距离。

7. 发明申请

US20110025186A1 SPARK PLUG FOR INTERNAL COMBUSTION ENGINE 有权
标题翻译：火花塞用于内燃机
公开(公告)号：US20110025186A1
公开(公告)日：2011-02-03
申请号：US12937231
申请日：2009-04-03
申请人： Iwao Kunitomo , Kenji Ban
发明人： Iwao Kunitomo , Kenji Ban
IPC分类号： H01T13/32
CPC分类号： H01T13/32 , H01T13/20
摘要： A spark plug in which a front end portion of a ground electrode is positioned outside of a virtual outer circumferential face that is formed by extending a front and outer circumferential face of a center electrode in the axis direction, and positioned on a front end side in the axis direction with respect to a virtual face including a front end face of the center electrode. Further, the equation 1.1≦b/a≦1.6 is satisfied, where “a” (mm) represents a first minimal distance between the front end portion of the center electrode and the front end portion of the ground electrode and, where “b” (mm) represents a second minimal distance between the front end portion of a ceramic insulator and the front end portion of the ground electrode.
摘要翻译：一种火花塞，其中接地电极的前端部位于通过使中心电极的前外周面沿轴向延伸而形成的假想外周面的外侧，位于前端侧相对于包括中心电极的前端面的虚拟面的轴方向。此外，满足方程式1.1＆nlE; b / a＆nlE; 1.6，其中“a”（mm）表示中心电极的前端部分和接地电极的前端部分之间的第一最小距离，并且其中“b “（mm）表示陶瓷绝缘体的前端部和接地电极的前端部之间的第二最小距离。

8. 发明授权

US08047172B2 Plasma jet ignition plug 有权
标题翻译：等离子喷射火花塞
公开(公告)号：US08047172B2
公开(公告)日：2011-11-01
申请号：US12366094
申请日：2009-02-05
申请人： Toru Nakamura , Yuichi Yamada , Iwao Kunitomo , Yoshikuni Sato , Daisuke Nakano
发明人： Toru Nakamura , Yuichi Yamada , Iwao Kunitomo , Yoshikuni Sato , Daisuke Nakano
IPC分类号： F02P21/04 , F02P23/00
CPC分类号： H01T13/50 , H01T13/32
摘要： A plasma jet ignition plug capable of inhibiting occurrence of channeling while reducing removal of energy of plasma through a ground electrode at the time of emission of plasma. A ground electrode of a plasma jet ignition plug projects inward from a front end face of a metallic shell toward an opening end of a cavity which is open at a front end face of an insulator. A projecting distal end which forms a spark discharge gap between the same and a center electrode within a cavity is located inward, with respect to a diametral direction P orthogonal to an axis O, of a position which is located 0.5 mm radially outward from the opening end of the cavity.
摘要翻译：一种等离子喷射火花塞，其能够抑制发射通道，同时在发射等离子体时减少通过接地电极去除等离子体的能量。等离子喷射火花塞的接地电极从金属壳的前端面朝向在绝缘体的前端面开口的空腔的开口端向内突出。在腔内形成火花放电间隙的突出的远端相对于与轴线O垂直的直径方向P位于距开口径向向外0.5mm的位置的内侧腔的末端。

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