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公开(公告)号：US10333282B2
公开(公告)日：2019-06-25
申请号：US16037332
申请日：2018-07-17
Applicant: DENSO CORPORATION
Inventor： Shohei Ishida , Noriaki Nishio , Shun Sugita , Yuya Abe
Abstract: A spark plug includes a main ground electrode having a main connecting portion connected to the housing and forming a discharge gap between the main ground electrode and the center electrode, and a sub ground electrode having a sub connecting portion connected to the housing. The direction on which the main connecting portion and a plug center axis are arranged is set to be perpendicular to an air flow direction of an air stream in the combustion chamber. The sub connecting portion is located in a downstream side than the main connecting portion. The tip end position of the sub ground electrode in the plug axial direction is located in farther tip end side than that of the main ground electrode is. The sub ground electrode is configured such that an end point of the discharge spark is movable on the sub ground electrode.
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公开(公告)号：US09391431B2
公开(公告)日：2016-07-12
申请号：US14093096
申请日：2013-11-29
Applicant: DENSO CORPORATION
Inventor： Shinichi Okabe , Yoshihiro Nakase , Akimitsu Sugiura , Yuya Abe
CPC classification number: H01T13/52 , H01T13/467
Abstract: A barrier discharge ignition apparatus has a tip end exposed to a combustion chamber of an internal combustion engine and, when subjected to a high-frequency high-voltage AC burst, generates streamer discharges for igniting a fuel/air mixture in the combustion chamber. A central electrode of the apparatus, covered by a dielectric layer and coaxially enclosed in a ground electrode, extends into the combustion chamber to a greater distance than the ground electrode. An electrode portion close to the tip end of the inner periphery of the ground electrode protrudes towards the dielectric layer, for creating a localized high-density electric field. The streamer discharges thereby enter both the to combustion chamber and also a discharge chamber of the ignition apparatus.
Abstract translation: 阻挡放电点火装置具有暴露于内燃机的燃烧室的前端，当经受高频高压交流脉冲时，产生用于点燃燃烧室内的燃料/空气混合物的流光放电。 该装置的中心电极被电介质层覆盖并同轴地封闭在接地电极中，延伸到燃烧室中至比接地电极更大的距离。 靠近接地电极的内周的末端的电极部朝向电介质层突出，用于产生局部高密度电场。 流光放电从而进入燃烧室和点火装置的放电室。
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Patent Agency Ranking
公开(公告)号：US09267474B2
公开(公告)日：2016-02-23
申请号：US13943868
申请日：2013-07-17
Applicant: DENSO CORPORATION
Inventor： Yuya Abe , Akimitsu Sugiura , Shinichi Okabe
CPC classification number: F02M57/06 , F02P23/045
Abstract: In an ignition device, a base section of a discharge chamber is formed by a part of a central dielectric body. A front section of a ground electrode and a front end section of the central dielectric body are projected toward a combustion chamber of a head cylinder of an internal combustion engine by a predetermined height which is measured from a top ceiling wall of the head cylinder. The predetermined height of the front end section of the central dielectric body projected into the inside of the head cylinder is the same or higher than the predetermined height of the front end section of the ground electrode projected into the inside of the head cylinder. The predetermined height of the front end section of the ground electrode is within a range of 3 mm to 25 mm.
Abstract translation: 在点火装置中，放电室的基部由中心电介质体的一部分形成。 将接地电极的前部和中央电介质体的前端部朝向内燃机的头部气缸的燃烧室突出从头部气缸的顶部顶壁测量的预定高度。 突出到头筒内侧的中央电介质体的前端部的预定高度与突出于头筒内侧的接地电极的前端部的预定高度相同或更高。 接地电极的前端部的预定高度在3mm〜25mm的范围内。
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公开(公告)号：US10931086B2
公开(公告)日：2021-02-23
申请号：US16927043
申请日：2020-07-13
Applicant: DENSO CORPORATION
Inventor： Daisuke Shimamoto , Yuya Abe , Masamichi Shibata
Abstract: A spark plug includes a ground electrode facing a distal end surface of a center electrode. In a main body of the ground electrode, a first slanted surface is formed at a portion on a side facing the distal end surface and upstream of the center electrode relative to the airflow, a facing portion, a second slanted surface is formed at a portion on a side opposite to the side facing the distal end surface and upstream of the center electrode relative to the airflow, and when T represents a thickness of the main body of the ground electrode and Su represents a distance from a connection between the first slanted surface and the second slanted surface to the facing portion, 2T/16≤Su≤8T/16.
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公开(公告)号：US09331458B2
公开(公告)日：2016-05-03
申请号：US14134217
申请日：2013-12-19
Applicant: DENSO CORPORATION
Inventor： Shinichi Okabe , Yoshihiro Nakase , Akimitsu Sugiura , Yuya Abe
Abstract: An ignition system for an internal combustion engine includes a discharge portion of the center electrode in which a part thereof is surrounded by a bottom portion and a tubular tip portion of the center dielectric, the part of the discharge portion and the tubular tip portion are projected into a combustion chamber of the internal combustion engine from a substantially annular tip portion of the ground electrode that opens to the combustion chamber at a distal end of the ground electrode, a diameter-changing portion formed by reducing a diameter of a part of the tubular tip portion in a radial direction gradually as approaching toward a tip thereof, and a thin-walled portion formed by reducing a thickness of the tip of the tubular tip portion.
Abstract translation: 一种用于内燃机的点火系统包括中心电极的排出部分，其一部分被中心电介质的底部和管状末端部分包围，排出部分和管状尖端部分的一部分被突出 从接地电极的基本上环形的尖端部分在内部燃烧室的燃烧室中进入到在接地电极的远端处的燃烧室的直径变化部分，所述直径变化部分通过减小管状部分的一部分的直径而形成 沿径向方向的尖端部分逐渐接近尖端，并且通过减小管状末端部分的尖端的厚度而形成的薄壁部分。
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公开(公告)号：US10886709B1
公开(公告)日：2021-01-05
申请号：US16905174
申请日：2020-06-18
Applicant: DENSO CORPORATION
Inventor： Yuya Abe , Masamichi Shibata
IPC: H01T13/32
Abstract: On a base part forming a ground electrode in a spark plug, a facing surface is formed facing a distal end surface of a central electrode to have a shortest gap between the facing surface and the central electrode. A first slope surface is formed on an upper surface of the base part. A downstream-side end surface is formed parallel with a virtual plane, and connected to the first slope surface. A second slope surface is formed on a lower surface of the base part, connected to a downstream-side end surface. An opposing surface is formed on the lower surface of the base part. A width of the facing surface is wider than a width of the opposing surface. A first angle of the facing surface to the first slope surface satisfies a relationship of 10°≤θ1≤40°.
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公开(公告)号：US09027523B2
公开(公告)日：2015-05-12
申请号：US13671306
申请日：2012-11-07
Applicant: Nippon Soken, Inc. , Denso Corporation
Inventor： Shingo Morishima , Kenji Kanehara , Yuya Abe , Akimitsu Sugiura
IPC: F02P23/04
CPC classification number: F02P23/04
Abstract: A laser ignition apparatus includes a housing that has a male-threaded portion for fixing the housing and a hexagonal portion for tightening the male-threaded portion. Between a combustion chamber-side end of the male-threaded portion and an anti-combustion chamber-side end of the hexagonal portion, there is defined a non-optical element arrangement region in which none of an introducing optical element, an enlarging optical element and a focusing optical element of the apparatus is arranged. At one of a combustion chamber-side end and an anti-combustion chamber-side end of the non-optical element arrangement region, there is formed a reference surface that extends perpendicular to an axial direction of the housing. One of the introducing optical element, the enlarging optical element and the focusing optical element is received in the housing in such a manner as to be elastically pressed against the reference surface from outside of the non-optical element arrangement region.
Abstract translation: 激光点火装置包括具有用于固定壳体的阳螺纹部分和用于紧固阳螺纹部分的六边形部分的壳体。 在阳螺纹部分的燃烧室侧端部和六边形部分的防燃室侧端部之间，限定了非光学元件配置区域，其中不引入光学元件，放大光学元件 并且设置该装置的聚焦光学元件。 在非光学元件排列区域的燃烧室侧端部和防燃室侧端部之一形成有垂直于壳体的轴向延伸的基准面。 引入光学元件，放大光学元件和聚焦光学元件中的一个以从非光学元件布置区域的外部弹性地压靠基准面的方式被容纳在外壳中。
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