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公开(公告)号：US08082897B2
公开(公告)日：2011-12-27
申请号：US12452109
申请日：2008-06-13
申请人： Tomoaki Kato , Toru Nakamura , Yuichi Yamada
发明人： Tomoaki Kato , Toru Nakamura , Yuichi Yamada
摘要： The cavity of a plasma jet ignition plug is configured in a stepped shape; i.e., composed of a constricted portion and a diameter-increased portion (65). The inner diameter (B) of the constricted portion is made smaller than the inner diameter (A) of the diameter-increased portion. Further, as measured along the direction of the axis O, the length (Y) of the constricted portion is made equal to or greater than the length (X) of the diameter-increased portion. This configuration suppresses a pressure loss produced when the generated plasma expands within the cavity. As a result, the energy of the plasma at the time of jetting is increased, and the igniting performance for an air-fuel mixture can be improved.
摘要翻译： 等离子喷射火花塞的空腔构成阶梯状; 即由收缩部分和直径增加部分（65）组成。 收缩部的内径（B）比直径增大部的内径（A）小。 此外，沿着轴线O的方向测量，缩颈部分的长度（Y）等于或大于直径增加部分的长度（X）。 这种构造抑制了当所产生的等离子体在空腔内膨胀时产生的压力损失。 结果，喷射时等离子体的能量增加，能够提高空燃混合物的点火性能。
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2.发明授权Manufacturing method for ignition plug involves removing leading end portion of shell extended from end surface of insulator 有权火花塞的制造方法包括从绝缘体端面延伸的壳体的前端部分去除公开(公告)号：US07959482B2
公开(公告)日：2011-06-14
申请号：US12399177
申请日：2009-03-06
申请人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
发明人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
摘要： A manufacturing method for an ignition plug is provided. The method includes: preparing an insulator having a cavity provided at a leading end portion thereof by disposing a leading end of the center electrode more inwards than a leading end of the insulator; building the insulator in an interior of the metal shell such that the leading end of the insulator is situated closer to a rear end side than the leading end of the metal shell; removing at least part of a leading end portion of the metal shell which projects from a leading end face of the insulator; and disposing the ground electrode at the leading end portion of the metal shell and welding the ground electrode and the metal shell together after the removal step.
摘要翻译： 提供一种火花塞的制造方法。 该方法包括：通过将中心电极的前端比绝缘体的前端更向内设置，制备具有设置在其前端部分的空腔的绝缘体; 在金属外壳的内部建立绝缘体，使得绝缘体的前端位于比金属壳的前端更靠近后端侧; 从所述绝缘体的前端面移除所述金属壳的前端部的至少一部分; 并且将接地电极设置在金属壳的前端部，并且在去除步骤之后将接地电极和金属壳焊接在一起。
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公开(公告)号：US20100102728A1
公开(公告)日：2010-04-29
申请号：US12452109
申请日：2008-06-13
申请人： Tomoaki Kato , Toru Nakamura , Yuichi Yamada
发明人： Tomoaki Kato , Toru Nakamura , Yuichi Yamada
摘要： The cavity of a plasma jet ignition plug is configured in a stepped shape; i.e., composed of a constricted portion and a diameter-increased portion (65). The inner diameter (B) of the constricted portion is made smaller than the inner diameter (A) of the diameter-increased portion. Further, as measured along the direction of the axis O, the length (Y) of the constricted portion is made equal to or greater than the length (X) of the diameter-increased portion. This configuration suppresses a pressure loss produced when the generated plasma expands within the cavity. As a result, the energy of the plasma at the time of jetting is increased, and the igniting performance for an air-fuel mixture can be improved.
摘要翻译： 等离子喷射火花塞的空腔构成阶梯状; 即由收缩部分和直径增加部分（65）组成。 收缩部的内径（B）比直径增大部的内径（A）小。 此外，沿着轴线O的方向测量，缩颈部分的长度（Y）等于或大于直径增加部分的长度（X）。 这种构造抑制了当所产生的等离子体在空腔内膨胀时产生的压力损失。 结果，喷射时等离子体的能量增加，能够提高空燃混合物的点火性能。
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公开(公告)号：US08388395B2
公开(公告)日：2013-03-05
申请号：US13433482
申请日：2012-03-29
申请人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
发明人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
IPC分类号： H01J9/00
CPC分类号： H01T21/02
摘要： A method for manufacturing an ignition plug is provided. The method includes: preparing an insulator having a cavity provided at a leading end portion thereof by disposing a leading end of a center electrode more inwards in an axial hole than a leading end of the insulator; building the insulator in an interior of a metal shell; disposing a ground electrode at a leading end portion of the metal shell; positioning a center of a through hole of the ground electrode and a center of the cavity of the insulator; and welding the ground electrode and the metal shell together after the positioning step.
摘要翻译： 提供一种制造火花塞的方法。 该方法包括：通过在比绝缘体的前端更远的轴向孔内设置中心电极的前端，制造具有设置在其前端部的空腔的绝缘体; 在金属外壳的内部建立绝缘体; 在金属壳的前端部设置接地电极; 将接地电极的通孔的中心和绝缘体的空腔的中心定位; 并在定位步骤之后将接地电极和金属外壳焊接在一起。
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公开(公告)号：US20120184171A1
公开(公告)日：2012-07-19
申请号：US13433482
申请日：2012-03-29
申请人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
发明人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
IPC分类号： H01T21/02
CPC分类号： H01T21/02
摘要： A method for manufacturing an ignition plug is provided. The method includes: preparing an insulator having a cavity provided at a leading end portion thereof by disposing a leading end of a center electrode more inwards in an axial hole than a leading end of the insulator; building the insulator in an interior of a metal shell; disposing a ground electrode at a leading end portion of the metal shell; positioning a center of a through hole of the ground electrode and a center of the cavity of the insulator; and welding the ground electrode and the metal shell together after the positioning step.
摘要翻译： 提供一种制造火花塞的方法。 该方法包括：通过在比绝缘体的前端更远的轴向孔内设置中心电极的前端，制造具有设置在其前端部的空腔的绝缘体; 在金属外壳的内部建立绝缘体; 在金属壳的前端部设置接地电极; 将接地电极的通孔的中心和绝缘体的空腔的中心定位; 并在定位步骤之后将接地电极和金属外壳焊接在一起。
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公开(公告)号：US20090227169A1
公开(公告)日：2009-09-10
申请号：US12399177
申请日：2009-03-06
申请人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
发明人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
IPC分类号： H01T21/02
摘要： A manufacturing method for an ignition plug is provided. The method includes: preparing an insulator having a cavity provided at a leading end portion thereof by disposing a leading end of the center electrode more inwards than a leading end of the insulator; building the insulator in an interior of the metal shell such that the leading end of the insulator is situated closer to a rear end side than the leading end of the metal shell; removing at least part of a leading end portion of the metal shell which projects from a leading end face of the insulator; and disposing the ground electrode at the leading end portion of the metal shell and welding the ground electrode and the metal shell together after the removal step.
摘要翻译： 提供一种火花塞的制造方法。 该方法包括：通过将中心电极的前端比绝缘体的前端更向内设置，制备具有设置在其前端部分的空腔的绝缘体; 在金属外壳的内部建立绝缘体，使得绝缘体的前端位于比金属壳的前端更靠近后端侧; 从所述绝缘体的前端面移除所述金属壳的前端部的至少一部分; 并且将接地电极设置在金属壳的前端部，并且在去除步骤之后将接地电极和金属壳焊接在一起。
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公开(公告)号：US20070221156A1
公开(公告)日：2007-09-27
申请号：US11723625
申请日：2007-03-21
申请人： Katsunori Hagiwara , Satoshi Nagasawa , Wataru Matutani , Toru Nakamura , Tomoaki Kato , Yuichi Yamada
发明人： Katsunori Hagiwara , Satoshi Nagasawa , Wataru Matutani , Toru Nakamura , Tomoaki Kato , Yuichi Yamada
摘要： A plasma-jet spark plug includes a metal shell, an electrical insulator retained in the metal shell, a center electrode held in an axial hole of the electrical insulator to define a cavity by a front end face of the center electrode and an inner circumferential surface of the insulator axial hole and a ground electrode arranged on a front end of the electrical insulator. The ground electrode has an opening defining portion defining an opening for communication between the cavity and the outside of the spark plug. The opening defining portion is located radially inside of or in contact with a first imaginary circular conical surface where the first imaginary circular conical surface has an axis coinciding with an axis of the spark plug and a vertex angle of 120° opening toward a front end of the spark plug and passing through a front edge of the insulator axial hole.
摘要翻译： 等离子体火花塞包括金属壳，保持在金属壳中的电绝缘体，保持在电绝缘体的轴向孔中的中心电极，以通过中心电极的前端面限定空腔和内周面 的绝缘体轴向孔和布置在电绝缘体的前端上的接地电极。 接地电极具有限定开口的开口限定部分，用于在空腔和火花塞外部之间连通。 开口限定部分位于第一假想圆锥形表面的径向内部或与第一假想圆锥形表面接触，其中第一假想圆形圆锥形表面具有与火花塞的轴线重合的轴线和朝向前端的开口的顶角120° 火花塞穿过绝缘体轴向孔的前缘。
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公开(公告)号：US08257127B2
公开(公告)日：2012-09-04
申请号：US12399096
申请日：2009-03-06
申请人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
发明人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
IPC分类号： H01T21/02
CPC分类号： H01T21/02
摘要： A method for manufacturing an ignition plug is provided. The method includes: preparing an insulator having a cavity provided at a leading end portion thereof by disposing a leading end of a center electrode more inwards in an axial hole than a leading end of the insulator; building the insulator in an interior of a metal shell; disposing a ground electrode at a leading end portion of the metal shell; positioning a center of a through hole of the ground electrode and a center of the cavity of the insulator; and welding the ground electrode and the metal shell together after the positioning step.
摘要翻译： 提供一种制造火花塞的方法。 该方法包括：通过在比绝缘体的前端更远的轴向孔内设置中心电极的前端，制造具有设置在其前端部的空腔的绝缘体; 在金属外壳的内部建立绝缘体; 在金属壳的前端部设置接地电极; 将接地电极的通孔的中心和绝缘体的空腔的中心定位; 并在定位步骤之后将接地电极和金属外壳焊接在一起。
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公开(公告)号：US20090227168A1
公开(公告)日：2009-09-10
申请号：US12399096
申请日：2009-03-06
申请人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
发明人： Toru Nakamura , Tomoaki Kato , Yuichi Yamada
IPC分类号： H01T21/02
CPC分类号： H01T21/02
摘要： A method for manufacturing an ignition plug is provided. The method includes: preparing an insulator having a cavity provided at a leading end portion thereof by disposing a leading end of a center electrode more inwards in an axial hole than a leading end of the insulator; building the insulator in an interior of a metal shell; disposing a ground electrode at a leading end portion of the metal shell; positioning a center of a through hole of the ground electrode and a center of the cavity of the insulator; and welding the ground electrode and the metal shell together after the positioning step.
摘要翻译： 提供一种制造火花塞的方法。 该方法包括：通过在比绝缘体的前端更远的轴向孔内设置中心电极的前端，制造具有设置在其前端部的空腔的绝缘体; 在金属外壳的内部建立绝缘体; 在金属壳的前端部配置接地电极; 将接地电极的通孔的中心和绝缘体的空腔的中心定位; 并在定位步骤之后将接地电极和金属外壳焊接在一起。
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公开(公告)号：US07305954B2
公开(公告)日：2007-12-11
申请号：US11723625
申请日：2007-03-21
申请人： Katsunori Hagiwara , Satoshi Nagasawa , Wataru Matutani , Toru Nakamura , Tomoaki Kato , Yuichi Yamada
发明人： Katsunori Hagiwara , Satoshi Nagasawa , Wataru Matutani , Toru Nakamura , Tomoaki Kato , Yuichi Yamada
摘要： A plasma-jet spark plug includes a metal shell, an electrical insulator retained in the metal shell, a center electrode held in an axial hole of the electrical insulator to define a cavity by a front end face of the center electrode and an inner circumferential surface of the insulator axial hole and a ground electrode arranged on a front end of the electrical insulator. The ground electrode has an opening defining portion defining an opening for communication between the cavity and the outside of the spark plug. The opening defining portion is located radially inside of or in contact with a first imaginary circular conical surface where the first imaginary circular conical surface has an axis coinciding with an axis of the spark plug and a vertex angle of 120° opening toward a front end of the spark plug and passing through a front edge of the insulator axial hole.
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