-
公开(公告)号：US20240291244A1
公开(公告)日：2024-08-29
申请号：US18571546
申请日：2022-07-12
申请人： Niterra Co., Ltd.
发明人： Kaito NAKAMURA , Daisuke SUMOYAMA , Takaaki KIKAI , Kengo HATTORI
IPC分类号： H01T13/39
CPC分类号： H01T13/39
摘要： A spark plug which is reduced in consumption of a discharge member, thereby having a longer service life. This spark plug is provided with: a first electrode that comprises a discharge member; and a second electrode that faces the discharge member, with a spark gap lying therebetween. The discharge member is mainly composed of Ru, while containing 0.5% by mass to 30% by mass of Ni or Co.
-
公开(公告)号：US11916357B2
公开(公告)日：2024-02-27
申请号：US18106433
申请日：2023-02-06
申请人： EcoPower Spark, LLC
发明人： David Resnick
摘要： A spark plug including a terminal end, a firing end, an axial centerline extending between the terminal end and the firing end, and an insulative core extending between the terminal end and the firing end. The insulative core includes a central bore coincident with the axial centerline extending through the insulative core, and an insulative nose extending along the axial centerline at the firing end of the insulative core, the insulative nose having an axial length and defining an end surface of the insulative core, wherein a cross-sectional area of the insulative nose perpendicular to the axial centerline varies along the axial length of the insulative nose with a cross-sectional area along at least a portion of the axial length being less than a surface area of the end surface so that a perimeter surface along the portion of the axial length of the insulative nose has a concave profile.
-
公开(公告)号：US20230318264A1
公开(公告)日：2023-10-05
申请号：US18044036
申请日：2021-07-13
申请人： Robert Bosch GmbH
摘要： A pre-chamber spark plug includes (i) a middle electrode with a first noble metal body which has a first end spark face, (ii) a ground electrode with a second noble metal body which has a second end spark face, (iii) a housing, with the ground electrode being fixed in the housing, (iv) an insulator which electrically insulates the middle electrode with respect to the ground electrode, and (v) a cap, which together with a part of the housing, defines a pre-chamber. The first end spark face and the second end spark face are arranged oppositely at a distance from one another.
-
公开(公告)号：US11777281B2
公开(公告)日：2023-10-03
申请号：US18116544
申请日：2023-03-02
发明人： Daniel Konig
摘要： A spark plug electrode with an electrode tip formed on an electrode base using an additive manufacturing process, such as a powder bed fusion technique. The spark plug electrode includes an electrode base that at least partially surrounds a heat dissipating core, an electrode tip that is formed on the electrode base and includes a precious metal-based material, and a thermal coupling zone that directly thermally couples the electrode tip to the heat dissipating core. In some examples, the electrode tip is formed on an electrode base that has been cut or severed to expose a portion of the heat dissipating core, such that the electrode tip is formed directly on the heat dissipating core using additive manufacturing.
-
公开(公告)号：US20230299566A1
公开(公告)日：2023-09-21
申请号：US18202218
申请日：2023-05-25
申请人： EcoPower Spark, LLC
发明人： David Resnick
摘要： One example provides a center electrode for a spark plug having an axial centerline. An electrode head of a first material has an upper side, a lower side, and a head cross-sectional area in a plane perpendicular to the axial centerline, with an outer edge of the lower side of the electrode head to provide a continuous spark edge about a perimeter of the lower side of the electrode head. An electrode wire extends from the lower side of the electrode head coaxially with the axial centerline and having a wire cross-sectional area in a plane perpendicular to the axial centerline less than the head cross-sectional area. The electrode wire includes a center core of a second material, and an outer sheath of the first material disposed about the center core, the electrode head and outer sheath of the electrode wire being a contiguous piece of the first material.
-
公开(公告)号：US11695256B2
公开(公告)日：2023-07-04
申请号：US17970092
申请日：2022-10-20
申请人： DENSO CORPORATION
发明人： Akimitsu Sugiura
摘要： A spark plug for an internal combustion engine includes insulating glass having a tubular shape, a central electrode including a tip protruding portion, a housing having a tubular shape, and a plug cover provided over an auxiliary combustion chamber. The plug cover is provided with injection holes through which the auxiliary combustion chamber communicates with the exterior. The central electrode includes a base material and a core material disposed inside the base material and having a higher thermal conductivity than the base material. The core material includes a large diameter portion and a small diameter portion continuously formed on a tip side of the large diameter portion. The small diameter portion has a smaller diameter than the large diameter portion, and includes, in a part of the small diameter portion in an axial direction, a small-diameter columnar portion having a constant diameter. At least a part of the small-diameter columnar portion is disposed further on the tip side of the spark plug than a tip of the insulating glass.
-
公开(公告)号：US11646551B2
公开(公告)日：2023-05-09
申请号：US17304637
申请日：2021-06-23
申请人： Caterpillar Inc.
发明人： James Jay Cress
CPC分类号： H01T13/39 , H01T13/40 , H01T13/467 , H01T13/54
摘要： A spark plug includes a central electrode member and an outer electrode member. The central electrode member includes a central base and a plurality of electrode prongs extending in an axial direction from the central base. The outer electrode member surrounds the central electrode member. The outer electrode member includes a wall that is radially spaced from the plurality of electrode prongs to allow a series of electric arcs to form between the wall and the plurality of electrode prongs. The outer electrode member and the central electrode member are sized and positioned relative to one another such that a first rate of wear of the outer electrode member, along a longitudinal axis of the spark plug, is substantially equal to a second rate of wear of the central electrode member along the longitudinal axis.
-
公开(公告)号：US20180366918A1
公开(公告)日：2018-12-20
申请号：US16072425
申请日：2016-10-17
摘要： An electrode base material of the spark plug contains not less than 50 wt. % of Ni. A discharge member contains not less than 45 wt. % of Pt, and at least one of Ni and Rh. An intermediate member contains Pt and Ni. In the discharge member, a content of Pt is highest, and a total content of Pt, Rh, and Ni is not less than 92 wt. %. In the intermediate member, a content of one of Pt and Ni is not less than 50 wt. %, a content of Ni is higher than a content of Ni in the discharge member, and a total content of Pt, Rh, and Ni is not less than 85 wt. %. A thickness of the diffusion layer formed between the discharge member and the intermediate member is not less than 0.002 mm and not more than 0.065 mm.
-
公开(公告)号：US10122154B1
公开(公告)日：2018-11-06
申请号：US15962017
申请日：2018-04-25
发明人： Hiroki Yamamoto , Hidekazu Wakita
摘要： A method for manufacturing a spark plug includes pressing a tip in a first direction from a first surface thereof toward a second surface thereof via a jig when the tip is in contact with an electrode base material; and welding the electrode base material to the tip being pressed by the jig. The jig has a recessed portion which is brought into contact with an edge of the tip, and the recessed portion has a diameter-decreasing portion having an inner dimension that gradually decreases toward a second direction opposite to the first direction. The inner dimension of a first end portion in the first direction of the diameter-decreasing portion is larger than the outer dimension of the edge, and the inner dimension of a second end portion in the second direction of the diameter-decreasing portion is equal to the outer dimension of the edge.
-
公开(公告)号：US10063037B2
公开(公告)日：2018-08-28
申请号：US15399958
申请日：2017-01-06
摘要： A spark plug includes a central electrode and a noble metal tip, which are joined together with a fusion portion interposed therebetween. A tip-adjoining boundary of the fusion portion has a shape that curves convexly toward the fusion portion. A central-electrode-adjoining boundary of the fusion portion has a shape that curves convexly toward the central electrode. The outline of a portion of the fusion portion exposed to the outer surface has a shape that curves concavely into the inner side of the fusion portion.
-
-
-
-
-
-
-
-
-
搜索结果
1112 条记录 (耗时 0.039 秒)
