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1. 发明公开

US20240250507A1 SPARK PLUG 审中-公开
公开(公告)号：US20240250507A1
公开(公告)日：2024-07-25
申请号：US18559762
申请日：2022-06-06
申请人： Niterra Co., Ltd.
发明人： Susumu IMAI , Tatsuya GOZAWA
IPC分类号： H01T13/08
CPC分类号： H01T13/08
摘要： A spark plug includes an insulator having an axial hole, a center electrode disposed in the axial hole and having a forward end portion projecting to a forward end of the axial hole, a tubular metallic shell which holds the insulator on its inner circumference and has a screw portion formed on its outer circumferential surface, and a ground electrode whose first end portion is fixed to a through hole provided in the metallic shell and whose second end portion forms a discharge gap between the second end portion and the forward end portion. The screw portion has a first screw portion located on a rear end of the through hole and a second screw portion located on a forward end of the through hole, and the first screw portion has a pitch diameter larger than that of the second screw portion.

2. 发明授权

US11757261B2 Ground electrode for spark plug and spark plug 有权
公开(公告)号：US11757261B2
公开(公告)日：2023-09-12
申请号：US17980033
申请日：2022-11-03
申请人： DENSO CORPORATION
发明人： Yuji Kaji , Nobuo Abe , Naoto Hayashi
IPC分类号： H01T13/32 , H01T13/34 , H01T13/08 , H01T13/39
CPC分类号： H01T13/39 , H01T13/32
摘要： A ground electrode for a spark plug includes a ground electrode body arranged to face a center electrode of the spark plug. The ground electrode includes a discharge portion mounted on the ground electrode body to face the center electrode with a spark gap between the discharge portion and the center electrode. The discharge portion is made of a platinum-based alloy of platinum, rhodium, and nickel. A first mass percent of the rhodium contained in the platinum-based alloy of the platinum, the rhodium, and the nickel is within a first range from 2 wt % to 20 wt % inclusive. A second mass percent of the nickel contained in the platinum-based alloy of the platinum, the rhodium, and the nickel being within a second range from 2.5 wt % to 12 wt % inclusive.

3. 发明授权

US11728626B2 Method for manufacturing a prechamber spark plug 有权
公开(公告)号：US11728626B2
公开(公告)日：2023-08-15
申请号：US17769513
申请日：2020-09-28
申请人： Robert Bosch GmbH
发明人： Matthias Budde , Matthias Blankmeister , Philipp Rottmann , Stephan Kaske , Ugur Yilmaz
IPC分类号： H01T13/54 , H01T21/02 , H01T13/08
CPC分类号： H01T21/02 , H01T13/08 , H01T13/54
摘要： A method for manufacturing a prechamber spark plug including an external thread and a cap including at least one through-opening. The method includes: providing the prechamber spark plug without a cap and including a cylindrical circumferential surface for the external thread. Mounting the cap, which includes at least one through-opening, in an arbitrary alignment at the prechamber spark plug, and creating the external thread at the circumferential surface in such a way that a thread start and/or a thread end of the external thread is aligned in relation to the through-opening at a predetermined position.

4. 发明申请

US20230040766A1 PRECHAMBER SPARK PLUG WITH IMPROVED CAP 有权
公开(公告)号：US20230040766A1
公开(公告)日：2023-02-09
申请号：US17791448
申请日：2020-12-09
申请人： Robert Bosch GmbH
发明人： Stephan Kaske , Ugur Yilmaz
IPC分类号： H01T13/08 , H01T13/54
摘要： A prechamber spark plug. The prechamber spark plug includes a housing and a cap, which is arranged at a combustion-chamber end of the prechamber spark plug. The cap has, on the combustion-chamber side, a recess in an outer side.

5. 发明授权

US11552456B1 Pre-chamber spark plug 有权
公开(公告)号：US11552456B1
公开(公告)日：2023-01-10
申请号：US17572130
申请日：2022-01-10
申请人： FEDERAL-MOGUL IGNITION LLC
发明人： James D. Lykowski
IPC分类号： H01T13/06 , F02B19/12 , H01T13/08 , H01T13/54 , F02B19/10
摘要： A pre-chamber spark plug includes a shell extending along a longitudinal axis and comprising an inner surface. The pre-chamber spark plug further includes an insulator including an outer surface. The pre-chamber spark plug further includes a pre-chamber cap connected to the shell. The pre-chamber cap and the shell together forms a pre-chamber. The pre-chamber spark plug further includes an annular reservoir defined between the outer surface of the insulator and the inner surface of the shell. The annular reservoir is spaced apart from the pre-chamber with respect to the longitudinal axis. The pre-chamber spark plug further includes a plurality of projections disposed between the annular reservoir and the pre-chamber with respect to the longitudinal axis. The plurality of projections at least partially define a plurality of flow passages therebetween.

6. 发明申请

US20220360051A1 SPARK PLUG 有权
公开(公告)号：US20220360051A1
公开(公告)日：2022-11-10
申请号：US17425522
申请日：2020-11-19
申请人： NGK SPARK PLUG CO., LTD.
发明人： Kenji BAN , Tatsuya GOZAWA
IPC分类号： H01T13/08 , H01T13/32 , H01T13/34
摘要： A spark plug includes a center electrode, a tubular metallic shell which holds the center electrode therein in an insulated state, and a ground electrode which faces a forward end portion of the center electrode. The metallic shell has a penetration hole which penetrates the metallic shell in a direction intersecting an axial direction. The ground electrode has a press-fitted portion inserted into the penetration hole and fixed to the metallic shell, a projecting portion projecting toward an inner side of the metallic shell, and an insertion portion disposed between the press-fitted portion and the projecting portion, inserted into the penetration hole, and forming a space between the insertion portion and an inner surface of the penetration hole. An angle α formed between the inner surface of the penetration hole and an outer surface of the insertion portion falls within a range of 0°

7. 发明授权

US11473485B2 Cooling of the spark plug with improved contact surface 有权
公开(公告)号：US11473485B2
公开(公告)日：2022-10-18
申请号：US17415965
申请日：2019-12-19
申请人： Caterpillar Energy Solutions GmbH
发明人： Inigo Guisasola
IPC分类号： F01P3/16 , F02M53/04 , F02M57/06 , H01T13/06 , F02P13/00 , H01T13/08 , H01T13/16 , H01T13/54
摘要： The present invention pertains to a spark plug for an internal combustion engine, comprising a metal outer shell extending in a longitudinal direction from a proximal end to a distal tip end configured to be oriented towards a combustion chamber, said outer shell comprising a fixation portion for attachment of the spark plug to a metal sleeve of the internal combustion engine and arranged at a region proximal of the tip end, wherein the outer shell furthermore comprises a first contact surface arranged at a region distal of the fixation portion and configured to contact a distal end of the sleeve, when the spark plug is attached to the sleeve.

8. 发明申请

US20220140576A1 SPARK PLUG WITH MULTIPLE SPARK GAPS 有权
公开(公告)号：US20220140576A1
公开(公告)日：2022-05-05
申请号：US17507487
申请日：2021-10-21
申请人： FEDERAL-MOGUL IGNITION GMBH
发明人： Werner Niessner , Michael Golin
IPC分类号： H01T13/46 , H01T13/08
摘要： A spark plug having multiple spark gaps, where at least one of the spark gaps is located within a prechamber. The spark plug may include a first center wire assembly, a second center wire assembly, an insulator, a metallic shell, a first sparking area with a prechamber cap and a ground electrode for a prechamber spark gap, and a second sparking area with a ground electrode for a main chamber spark gap. The spark plug is designed to maximize engine performance and/or operation by utilizing the multiple spark gaps, where the prechamber spark gap may be used for certain operating conditions where such a spark gap is advantageous and the separate main chamber spark gap may be used for other conditions where a main chamber spark gap is advantageous.

9. 发明申请

US20210159674A1 SPARK PLUG ASSEMBLIES FOR TURBOMACHINES 有权
公开(公告)号：US20210159674A1
公开(公告)日：2021-05-27
申请号：US16693430
申请日：2019-11-25
申请人： General Electric Company
发明人： Elias Marquez
IPC分类号： H01T13/08 , F02C7/266
摘要： Spark plug assemblies and turbomachines are provided. A spark plug assembly includes a monolithic hollow cylinder extending along a longitudinal axis between a first end and a second end, the monolithic hollow cylinder including a sidewall defining an interior, a first end wall, and a second end opening. The first end wall defines a first end opening at the first end. The second end opening is defined at the second end. The spark plug assembly further includes an igniter assembly extending along the longitudinal axis into the interior through the first end opening and from the interior through the second end opening. The spark plug assembly further includes a piston surrounding the igniter, the piston disposed within the interior and extending from the interior along the longitudinal axis through the second end opening.

10. 发明申请

US20210104874A1 HIGH THREAD JAMB NUT WITH RETAINING CLIP 有权
公开(公告)号：US20210104874A1
公开(公告)日：2021-04-08
申请号：US17063081
申请日：2020-10-05
申请人： FRAM GROUP IP LLC
发明人： Matthew B Below , Timothy J Smith
IPC分类号： H01T13/08 , H01T13/36 , H01T13/12
摘要： A spark plug is provided that includes an improved jamb nut configuration, which provides improved torque transfer and prevents inadvertent separation of the jamb nut from the remaining components of the spark plug, particularly during removal from the engine head. The spark plug is configured for axial insertion into the plug hole, and may have a non-axisymmetric ground shield that fits into the plug hole, wherein the plug hole is also provided with a complementary non-axisymmetric shape. The spark plug includes a central insulator, which has an inner end surrounding a central electrode and supporting the ground shield, which is mounted on the insulator to support a ground strap adjacent the electrode for forming a spark therebetween. The insulator and ground shield are axially slidable into the plug hole, and the jamb nut is rotatable to fix the spark plug in position in a predefined orientation. The insulator includes a retaining clip outwardly of the jamb nut that permits rotation of the jamb nut relative to the insulator but prevents axial separation of the jamb nut during removal of the spark plug from the engine head. An improved tool is also provided which better distributes torque transfer to the jamb nut and includes a catch to facilitate pulling of the spark plug from the engine head.

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