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公开(公告)号：US20170358905A1
公开(公告)日：2017-12-14
申请号：US15492242
申请日：2017-04-20
摘要： A plasma jet plug includes a rod-shaped central electrode, an insulator having an axial hole, a metal shell disposed around the insulator, an orifice electrode electrically connected to the metal shell and located at a distal end side of the insulator, and a gasket that contacts an outer surface of the insulator and an inner surface of the metal shell. The insulator includes a first member, a second member and an inorganic seal layer. The first member has the axial hole and includes a large-diameter portion and a small-diameter portion. The second member has a through hole into which the small-diameter portion is inserted. The second member has an outer surface that contacts the gasket. The inorganic seal layer seals a gap between the first member and the second member. In a section including the axis, the sum of seal lengths is greater than or equal to 3 mm.
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公开(公告)号：US20160028214A1
公开(公告)日：2016-01-28
申请号：US14811160
申请日：2015-07-28
IPC分类号： H01T13/32
摘要： A plasma jet plug has a cavity defined by a surface of a center electrode, an inner surface of an insulator, and a surface of a ground electrode. When a volume of a portion of the cavity on a front side of a front portion of the center electrode is a first volume V1 and a volume of a portion of the cavity on a rear side of the front end of the center electrode is a second volume V2, the following expression is satisfied: V1/V2≧0.20.
摘要翻译： 等离子体喷射塞具有由中心电极的表面，绝缘体的内表面和接地电极的表面限定的空腔。 当中心电极的前部前侧的空腔的一部分的体积是第一容积V1，并且中心电极的前端的后侧的空腔的一部分的体积是第二容积 体积V2，满足以下表达式：V1 /V2≥0.20。
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公开(公告)号：US20200287359A1
公开(公告)日：2020-09-10
申请号：US16763601
申请日：2019-01-18
发明人： Kei TAKAHASHI , Daisuke KASAHARA
摘要： A spark plug includes: a central electrode extending from a front end side to a rear end side along an axis; an insulator including a front end section formed to be a bottomed tube surrounding a tip of the central electrode; a metal shell shaped to be tubular and structured to support the insulator such that the front end section of the insulator projects to the front end side from a front end section of the metal shell; and a plurality of ground electrodes each of which includes a first end forming a discharge gap with the front end section of the insulator and includes a second end connected to the front end section of the metal shell. The plurality of ground electrodes include a pair of ground electrodes different from each other in size of their discharge gaps.
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公开(公告)号：US20210148774A1
公开(公告)日：2021-05-20
申请号：US16622319
申请日：2018-10-25
发明人： Daisuke KASAHARA , Hirotaka SAITO
摘要： A pressure sensor includes: a housing having a tubular shape, and including a front end including an opening; a diaphragm that is disposed to close the opening, and is structured to deform depending on a pressure exerted on a front side of the diaphragm, and includes a hole extending rearwardly from a front end face of the diaphragm; a sensor element structured to output a signal varying depending on an amount of the deformation of the diaphragm; and a heat receiver including a first portion and a second portion. The first portion is disposed in the hole of the diaphragm, and is joined with an inner periphery of the diaphragm defining the hole. The second portion is formed integrally with the first portion, and is disposed adjacent to a front end of the first portion, and is structured to cover the front end face of the diaphragm.
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公开(公告)号：US20180038337A1
公开(公告)日：2018-02-08
申请号：US15552205
申请日：2016-02-03
摘要： A plasma jet plug includes: a tubular insulator having an axial hole; a center electrode disposed inside the axial hole; metal shell disposed on an outer circumference of the insulator; and an orifice electrode electrically connected to the metal shell and disposed on a front side of the insulator. A plasma generating cavity is formed by a surface of the center electrode, an inner surface of the insulator, and an inner surface of the orifice electrode. In the plasma jet plug, a shortest path length D1 of a surface path is greater than or equal to 5 times an aerial gap G, where the surface path extends, inside the cavity, from a surface of the center electrode via an inner surface of the insulator to an inner surface of the orifice electrode, and the aerial gap G is a shortest distance between the center electrode and the orifice electrode.
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