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公开(公告)号：US12027826B2
公开(公告)日：2024-07-02
申请号：US17972519
申请日：2022-10-24
Applicant: Federal-Mogul Ignition LLC
Inventor： Shuwei Ma
Abstract: A spark plug having a firing pad with minimal silicon diffusion and limited silicon oxidation at grain boundaries that can cause undesirable vertical cracking. In one embodiment, the firing pad has a multilayer structure having a base layer and a firing layer, wherein the base layer is a non-precious metal based material having silicon, and wherein the firing layer is a precious metal based material having yttrium in an amount of 0.1 to 0.5 wt %, inclusive. After at least 190 hours of isothermal treatment of at least 1000° C., an extent of vertical cracking from the sparking surface does not exceed 50% of a thickness of the firing pad or the firing layer.
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公开(公告)号：US20190214795A1
公开(公告)日：2019-07-11
申请号：US16088971
申请日：2017-03-24
Applicant: DENSO CORPORATION
Inventor： Masayuki TAMURA , Nobuo ABE , Masamichi SHIBATA
Abstract: An ignition plug for an internal combustion engine includes an electrode protrusion that protrudes from an electrode base material of a ground electrode toward a discharge gap. The electrode protrusion has a base part that is integrated with the electrode base material and a cover part that is joined to the base part and faces the discharge gap. The base part has an end surface facing a protrusion direction of the base part and a side peripheral surface. An outer edge of the end surface has a curved surface. The cover part is formed from a precious metal or a precious metal alloy having a lower linear expansion coefficient than that of a material for forming the base part and covers at least a part of the side peripheral surface and the end surface of the base part. While the ignition plug is attached to an internal combustion engine and the electrode protrusion is heated and then cooled, a projection is formed on an outer surface of a portion covering the side peripheral surface of the base part.
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公开(公告)号：US20180323582A1
公开(公告)日：2018-11-08
申请号：US15771881
申请日：2016-10-20
Applicant: Robert Bosch GmbH
Inventor： Ba Thien Chuong Vo , Chris Schimmel
Abstract: A spark plug, including an insulator, a casing including a sealing surface, and a gasket which rests against the sealing surface, the sealing surface including a plurality of recesses.
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公开(公告)号：US20180219356A1
公开(公告)日：2018-08-02
申请号：US15748216
申请日：2016-10-27
Applicant: In Tae JUNG
Inventor： In Tae JUNG
Abstract: An ignition plug for an internal combustion engine including: a main cell having a groove; an auxiliary cell which is formed on the outer circumferential surface of the main cell in a ring shape, surrounds the main cell and has a screw part formed on the outer face of the lower portion, the auxiliary cell having a bending part of which the upper portion is bent in the direction of the main cell and caught to the groove; a ring cover fit in the bending part; a first combustion chamber formed inside the lower portion of the auxiliary cell and in which an electrode for generating flames is accommodated; and an orifice valve combined to an end portion of the auxiliary cell to surround the electrode, the orifice valve having a protruding in the inward direction of the auxiliary cell and having at least one jet hole.
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公开(公告)号：US20180183216A1
公开(公告)日：2018-06-28
申请号：US15738650
申请日：2016-06-02
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Hironori UEGAKI , Seiji NAKANO , Hirokazu KURONO
Abstract: A spark plug including a metallic shell having a ground electrode, an insulator held inside the metallic shell and having an axial hole having a small diameter portion, an intermediate diameter portion connected to a rear end of the small diameter portion via a step portion, and a large diameter portion disposed on the rear side of the intermediate diameter portion, a resistor disposed inside the large diameter portion, a center electrode having a flange portion which bulges in a radial direction inside the intermediate diameter portion and comes into contact with the step portion and a leg portion which extends forward from the flange portion and is disposed inside the small diameter portion, and a seal disposed on the rear side of the step portion and electrically connecting the center electrode and the resistor. The rear end of the seal is located inside the intermediate diameter portion.
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Patent Agency Ranking
公开(公告)号：US20180183215A1
公开(公告)日：2018-06-28
申请号：US15548615
申请日：2016-02-04
Applicant: IMAGINEERING, INC.
Inventor： Yuji IKEDA
CPC classification number: H01T13/32 , F02P23/045 , H01T13/20 , H01T13/52 , H05H1/52
Abstract: A spark plug adopting an electromagnetic-wave-resonation-structure, efficiently ignites fuel inside a combustion chamber. The spark plug comprises a center electrode configured to transmit an electromagnetic wave having a discharge electrode, the discharge electrode mounted on a distal end of the center electrode, a casing member surrounding a periphery of the center electrode and the discharge electrode and a tip end part thereof functioning as a ground electrode so as to become in pair with the discharge electrode, and a vent configured to allow for an aerial passage is provided at a tip end of the casing member. At that time, the vent can be formed in a slit manner or in a hole type.
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公开(公告)号：US20180166863A1
公开(公告)日：2018-06-14
申请号：US15577389
申请日：2016-05-16
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Daisuke SUMOYAMA, SR. , Takuto NAKADA
Abstract: A spark plug having a tip provided on at least one of a center electrode and a ground electrode. The tip includes a body portion, a coating layer, and a high specific resistance layer. The body portion contains mostly Ir. The high specific resistance layer is provided on a side peripheral surface of the body portion, has a Ni content greater than the Ni content of the body portion and less than 50 mass %, and has a thickness of 2 μm or greater and 45 μm or less. The coating layer is provided on a side peripheral surface of the high specific resistance layer, contains 50 mass % or more of Ni, and has a thickness of 3 μm or greater and 20 μm or less. The tip has a specific resistance of 20×10−8 Ωm or less at room temperature.
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公开(公告)号：US09985418B1
公开(公告)日：2018-05-29
申请号：US15820522
申请日：2017-11-22
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Tomonori Kanemaru
Abstract: A cylindrical metal shell extending in an axis direction has a seat portion projecting radially outward, and an annular gasket is disposed so as to oppose a front end surface of the seat portion. A value G/S obtained by dividing an arithmetic average roughness G of a first surface, of the gasket, which comes into contact with the front end surface of the seat portion by an arithmetic average roughness S of the front end surface of the seat portion satisfies 0.5≤G/S≤2.0. The arithmetic average roughness G is not more than 0.16 μm, and an average of an area of a second surface on a back side of the first surface and an area of the first surface is not more than 280 mm2.
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公开(公告)号：US20180138665A1
公开(公告)日：2018-05-17
申请号：US15813386
申请日：2017-11-15
Applicant: DENSO CORPORATION
Inventor： Hiroya ISHIGURO , Tomoaki YONEKURA
Abstract: A spark plug includes a main fitting having a first, second, and third portions adjacent to each other. The spark plug further includes an insulator having a first opposing portion with a predetermined portion opposed to the first portion with a first interval, a second opposing portion with a second portion opposing the second portion with a second interval, and a third opposed portion opposed to the third portion. A connecting portion between the second opposing portion is supported by a support portion, and a value obtained by dividing the first interval by a length from the support portion to a rear end portion of the predetermined portion is configured to be smaller than a value obtained by dividing the second interval by a length from the support portion to a rear end portion of the second opposed portion.
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公开(公告)号：US20180123322A1
公开(公告)日：2018-05-03
申请号：US15702608
申请日：2017-09-12
Applicant: Laurian Petru Chirila
Inventor： Laurian Petru Chirila
CPC classification number: H01T13/20 , F02P15/00 , H01T13/467
Abstract: A multi-electrode spark plug having a large spark target volume is disclosed. The spark plugs have a plurality of ground electrode rods which extend from the base of the spark plug and are twisted around center electrode to provide a plurality of substantially equidistant spark points relative to the center electrode. The spark points are formed in parallel and around the elongated axis of the spark plug. This configuration enables the spark to be created where the localized concentration of fuel to air is richer, such as that which may exist when the engine is operating with lower revolutions per minute. Test results indicate that automobiles equipped with the multi-electrode spark plugs exhibit improved fuel economy, and substantially reduced emissions and air pollution.
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