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公开(公告)号：US12095236B2
公开(公告)日：2024-09-17
申请号：US18043945
申请日：2021-09-16
Applicant: Robert Bosch GmbH
Inventor： Egor Kostyukovich , Lyubov Belyaeva
Abstract: An electrode for a spark plug. The electrode includes a base body made from a nickel base alloy, and a wear part made from an iridium base alloy. The wear part is both welded to the base body and connected by a keyed connection.
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公开(公告)号：US11909178B2
公开(公告)日：2024-02-20
申请号：US17686010
申请日：2022-03-03
Applicant: FEDERAL-MOGUL IGNITION GMBH
Inventor： Werner Niessner , Peter Janas-Habu , Michael A. Golin
Abstract: A prechamber spark plug having a thermally enhanced prechamber cap with a thermally conductive core, such as one made from a copper-, aluminum- and/or silver-based material. Due to its location and function, a prechamber cap is exposed to thermal energy from a pre-combustion process taking place within a prechamber, as well as thermal energy from a combustion process taking place in a main combustion chamber. Thus, the prechamber cap is being heated on both its interior and its exterior and, if not sufficiently cooled, can become so hot that it undesirably triggers preignition events in the engine. The thermally enhanced prechamber cap may include a main body with an interior surface and an exterior surface, a thermally conductive core with one or more thermal segments and insert segments, and one or more openings extending between a prechamber and a main combustion chamber, where each opening extends through an insert segment that is designed to resistant to corrosion and/or erosion.
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公开(公告)号：US11901705B2
公开(公告)日：2024-02-13
申请号：US17870780
申请日：2022-07-21
Applicant: FEDERAL-MOGUL IGNITION GMBH
Inventor： Andreas Zeh , Rene Trebbels , John Antony Burrows
Abstract: An electrode tip assembly for a spark plug includes an electrode tip that is formed on an electrode base using an additive manufacturing process, such as a powder bed fusion technique, after which the electrode base is welded to an electrode body. The electrode base includes a welding side and an additive manufacturing side, and the electrode tip includes a plurality of laser deposition layers built on the additive manufacturing side of the electrode base.
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4.发明公开公开(公告)号：US20240030688A1
公开(公告)日：2024-01-25
申请号：US18043945
申请日：2021-09-16
Applicant: Robert Bosch GmbH
Inventor： Egor Kostyukovich , Lyubov Belyaeva
Abstract: An electrode for a spark plug. The electrode includes a base body made from a nickel base alloy, and a wear part made from an iridium base alloy. The wear part is both welded to the base body and connected by a keyed connection.
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公开(公告)号：US11742635B2
公开(公告)日：2023-08-29
申请号：US18157738
申请日：2023-01-20
Applicant: DENSO CORPORATION
Inventor： Akimitsu Sugiura
Abstract: A spark plug for an internal combustion engine includes a cylindrical insulator, a center electrode, a cylindrical housing, and a plug cover. On a tip side of the insulator, an auxiliary combustion chamber is formed which is surrounded by at least the plug cover. The plug cover is provided with nozzle holes that communicate between the auxiliary combustion chamber and the outside of the auxiliary combustion chamber. A central axis of the nozzle hole is inclined with respect to a plug radial direction when viewed in a plug axial direction. At least a part around an outer opening of the nozzle hole is provided with a concave portion that is adjacent to the outer opening. The concave portion is recessed from the outside to the inside of the plug cover.
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Patent Agency Ranking
公开(公告)号：US11715934B2
公开(公告)日：2023-08-01
申请号：US17615822
申请日：2021-01-26
Applicant: DKT VERWALTUNGS-GMBH
Inventor： Steffen Kuhnert
CPC classification number: H01T13/467 , H01T13/39 , H01T13/54 , H01T21/02
Abstract: A prechamber spark plug having a housing, which at its front end comprises a prechamber with an ignition electrode arranged therein, wherein the ignition electrode comprises a base and electrode legs protruding from the base, wherein the ignition electrode is machined from a sheet made of an iridium alloy and the legs are bent out of the plane of the base to form a basket shape, characterized in that the ignition electrode, in particular the electrode legs, is/are separated out of the sheet metal by means of laser cutting. Furthermore, a corresponding ignition electrode and a method for producing such an ignition electrode are claimed.
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公开(公告)号：US11715932B2
公开(公告)日：2023-08-01
申请号：US17726644
申请日：2022-04-22
Applicant: DENSO CORPORATION
Inventor： Akimitsu Sugiura
Abstract: A spark plug includes a plug cover provided at a tip end portion of a housing to cover an auxiliary combustion chamber where an electrical discharge gap is located. The plug cover has a curved surface portion. The curved surface portion includes an outer curved surface convexly curved outward. The curved surface portion has an inclined injection hole formed therein to allow communication between the auxiliary combustion chamber and an outside. The inclined injection hole is opened to be inclined, relative to a plug axial direction, outward in a plug radial direction toward a tip end side. In a cross section including a central axis of the inclined injection hole and along the plug axial direction, a tangent line of a portion of the outer curved surface that overlaps an extended line of the central axis of the inclined injection hole is orthogonal to the extended line.
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公开(公告)号：US20230163574A1
公开(公告)日：2023-05-25
申请号：US18157738
申请日：2023-01-20
Applicant: DENSO CORPORATION
Inventor： Akimitsu SUGIURA
Abstract: A spark plug for an internal combustion engine includes a cylindrical insulator, a center electrode, a cylindrical housing, and a plug cover. On a tip side of the insulator, an auxiliary combustion chamber is formed which is surrounded by at least the plug cover. The plug cover is provided with nozzle holes that communicate between the auxiliary combustion chamber and the outside of the auxiliary combustion chamber. A central axis of the nozzle hole is inclined with respect to a plug radial direction when viewed in a plug axial direction. At least a part around an outer opening of the nozzle hole is provided with a concave portion that is adjacent to the outer opening. The concave portion is recessed from the outside to the inside of the plug cover.
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公开(公告)号：US20230143967A1
公开(公告)日：2023-05-11
申请号：US18092967
申请日：2023-01-04
Applicant: Caterpillar Inc.
Inventor： James Jay Cress
CPC classification number: H01T13/462 , H01T13/54 , H01T21/02
Abstract: 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.
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公开(公告)号：US11527871B2
公开(公告)日：2022-12-13
申请号：US17427267
申请日：2020-01-24
Applicant: Robert Bosch GmbH
Inventor： Benedikt Reinsch , Carsten Kuenzel , Corinna Vonau , Hubertus Braun , Stefan Nufer
Abstract: A spark plug connecting element. The spark plug connecting element includes a first contact element and a second contact element. A resistor element is situated between the first contact element and the second contact element. The first contact element and the second contact element have a specific conductivity of 102 S/m to 108 S/m and the resistor element has a specific conductivity of 10−3 S/m to 101 S/m.
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