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公开(公告)号：US12027825B1
公开(公告)日：2024-07-02
申请号：US18396425
申请日：2023-12-26
Applicant: INNIO Jenbacher GmbH & Co OG
Inventor： Stefan Prankl , Johann Klausner , Robert Grabner
Abstract: Spark plug for igniting a combustible fuel in an internal combustion engine, wherein the spark plug has an igniter arranged at an end of the spark plug facing the combustion chamber, when the spark plug is mounted in the internal combustion engine. The spark plug includes a wall and a sealing area. The wall at least partially surrounds the igniter. The sealing area is used for sealing the combustion chamber against the environment. The wall has the sealing area located at an end of the wall, which end faces the combustion chamber when the spark plug is mounted in the internal combustion engine.
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公开(公告)号：US20240063609A1
公开(公告)日：2024-02-22
申请号：US18265869
申请日：2021-10-11
Applicant: Niterra Co., Ltd.
Inventor： Tatsuya GOZAWA , Ritsuka NAKAGAWA
CPC classification number: H01T13/32 , H01T13/08 , H01T13/467 , H01T13/54 , H01T13/34
Abstract: Provided is a spark plug with which pre-ignition of fuel gas that has flowed into an auxiliary chamber can be reduced. The spark plug is provided with: an insulator (11); a central electrode (14) disposed in the insulator; a main metal fitting (20) in which a shelf portion (23) for locking the insulator is provided; a grounding electrode (30) between the central electrode and which a spark gap (32) is provided; and a cap (40) joined to the main metal fitting by way of a melted portion (41). The cap forms an auxiliary chamber (42), and includes an injection port (45) penetrating from an inner surface (43) to an outer surface (44). There is a gap (47) extending from the auxiliary chamber to the melted portion, between a first surface (26) connecting an inner peripheral surface of the main metal fitting and an outer peripheral surface of the main metal fitting on a tip end side of the shelf portion, and a second surface (46) of the cap, connecting an inner surface and an outer surface thereof, and the gap includes an opening portion (48) which opens into the auxiliary chamber in a radial direction.
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公开(公告)号：US20230318264A1
公开(公告)日：2023-10-05
申请号：US18044036
申请日：2021-07-13
Applicant: Robert Bosch GmbH
Inventor： Stephan Kaske , Alexander Schramm , Andreas Benz , Matthias Blankmeister , Anatolij Odegov
Abstract: 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.
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公开(公告)号：US20230299566A1
公开(公告)日：2023-09-21
申请号：US18202218
申请日：2023-05-25
Applicant: EcoPower Spark, LLC
Inventor： David Resnick
Abstract: 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.
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公开(公告)号：US11664645B2
公开(公告)日：2023-05-30
申请号：US17528902
申请日：2021-11-17
Applicant: DENSO CORPORATION
Inventor： Daisuke Shimamoto , Kaori Doi , Akimitsu Sugiura , Syuhei Nakashima , Kyosuke Fujita
Abstract: A spark plug includes a housing, a porcelain insulator, a center electrode, a ground electrode, and a prechamber-defining portion. The prechamber-defining portion has a prechamber formed therein. The prechamber-defining portion has a plurality of spray holes. At least one of the spray holes is an upstream spray hole which is arranged upstream of a plug center axis in a gas flow within a main combustion chamber and designed such that and an angle which an extension in an opening direction makes with an inner wall surface of the prechamber is selected to be larger than 90°. A spark gap is formed upstream of a plug center axis in the gas flow within the main combustion chamber.
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Patent Agency Ranking
公开(公告)号：US20190131776A1
公开(公告)日：2019-05-02
申请号：US16095788
申请日：2017-05-25
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Jumpei ISASA , Seiji NAKANO , Hirokazu KURONO , Kuniharu TANAKA , Yutaka YOKOYAMA , Haruki YOSHIDA , Shun KONDO
Abstract: Provided is a spark plug capable of ensuring fouling resistance with a simple configuration. An insulator includes a step portion formed on an outer circumferential surface thereof. A center electrode is arranged in an axial hole of the insulator. A cylindrical metal shell having a shelf portion formed on an inner circumferential surface thereof is arranged radially outside the insulator. The insulator further includes a front end portion located frontward of the step portion. An outer circumferential surface of the front end portion has an arithmetic average roughness of 0.5 μm or smaller in a circumferential direction. A recess is formed with a depth of 3 to 20 μm in at least part of an end surface and the outer circumferential surface of the front end portion so as to extend from the front toward the rear.
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公开(公告)号：US20190027902A1
公开(公告)日：2019-01-24
申请号：US16037332
申请日：2018-07-17
Applicant: DENSO CORPORATION
Inventor： Shohei ISHIDA , Noriaki NISHIO , Shun SUGITA , Yuya ABE
CPC classification number: H01T13/32 , H01T13/02 , H01T13/467
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：US20180366918A1
公开(公告)日：2018-12-20
申请号：US16072425
申请日：2016-10-17
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Daisuke SUMOYAMA , Tatsuya GOZAWA , Tsutomu SHIBATA
Abstract: 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.
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公开(公告)号：US20180331508A1
公开(公告)日：2018-11-15
申请号：US15592936
申请日：2017-05-11
Applicant: DENSO International America, Inc. , DENSO CORPORATION
Inventor： Jeongung HWANG , Christopher THOMAS , Harrison BOLL
Abstract: A spark plug ground electrode assembly including a ground electrode having a ground electrode base defining a receptacle. A base flange extends about less than an entirety of the receptacle to define an open lateral end of the receptacle. The open lateral end of the receptacle is arranged to receive a ground electrode pad slid into the receptacle and onto a support surface in a direction perpendicular to a spark plug longitudinal axis. The flange of the ground electrode pad is arranged between the base flange and the support surface to restrict movement of the ground electrode pad along the spark plug longitudinal axis. A welding is at the open end of the receptacle to restrict movement of the ground electrode pad in the direction perpendicular to the spark plug longitudinal axis.
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公开(公告)号：US10079477B2
公开(公告)日：2018-09-18
申请号：US15187887
申请日：2016-06-21
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Daishi Uchiyama
Abstract: A method of manufacturing a spark plug includes a step (a) of chucking, by mutually facing chucks, a metallic shell extending along its center axis so as to fix the metallic shell, and (b) a step of pressing a ground electrode against the fixed metallic shell and applying voltage between the ground electrode and the chucks for resistance-welding the ground electrode and the metallic shell. A first chuck facing a second chuck, wherein, as viewed on an imaginary plane of projection perpendicular to the center axis, the number of support points on the second chuck is smaller than the number of support points on the first chuck for supporting the metallic shell.
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