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公开(公告)号：US10975829B2
公开(公告)日：2021-04-13
申请号：US16861578
申请日：2020-04-29
申请人： IC LLC
发明人： Kamal A. Assaad
IPC分类号： G01N27/70 , F02P13/00 , H01T13/41 , H01T13/38 , H01T13/32 , H01T13/46 , F02P5/15 , F02P17/12
摘要： A spark plug combustion ionization sensor for measuring ion current inside the cylinder of an internal combustion engine. The sensor measures ion current which flows when the energy released during combustion ionizes the air inside the cylinder, and thus can detect combustion and emission parameters. The spark plug combustion ionization sensor generally includes an insulated, dedicated sensing electrode, separate from the sparking electrode of a spark plug. The sensing electrode may also be shielded to further reduce interference such as electromagnetic interference (EMI). The use of a dedicated electrode allows for ion current measurement with less electromagnetic noise from the ignition process, and also eliminates the need for circuitry that is typically necessary when the sparking electrode is also used to sense ion current.
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公开(公告)号：US20200350747A1
公开(公告)日：2020-11-05
申请号：US16754547
申请日：2018-09-26
申请人： Robert Bosch GmbH
摘要： A method for manufacturing a spark plug. The method includes: furnishing an insulator; introducing into the insulator a material mixture that is configured to constitute a resistor paste, the material mixture containing ZrO2 and SiO2; heating the insulator and the material mixture present therein to a temperature T of at least 870° C., so that ZrO2 and SiO2 in the material mixture react at least partly to ZrSiO4.
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公开(公告)号：US10340667B2
公开(公告)日：2019-07-02
申请号：US16156337
申请日：2018-10-10
摘要： A spark plug having a resistor disposed between a metal terminal and a center electrode so as to be electrically connected to the metal terminal and the center electrode, wherein the resistor is in contact with an inner circumferential surface of the insulator. On a cross section taken along the axial line so as to include the axial line, in a case where a plurality of points are plotted at predetermined intervals in a direction of the axial line so as to be present on a partial boundary line, within an arbitrary range in the direction of the axial line, of a boundary line between the insulator and the resistor, and a regression line is drawn by a least-squares method with use of the plurality of points, an average value of distances in a direction perpendicular to the regression line between the regression line and the partial boundary line is 0.1 to 0.3 μm.
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公开(公告)号：US20190067915A1
公开(公告)日：2019-02-28
申请号：US16106187
申请日：2018-08-21
发明人： Kazuhiro KUROSAWA , Katsuya TAKAOKA , Kota YOKOYAMA , Kuniharu TANAKA , Hirokazu KURONO , Hironori UEGAKI
摘要： A spark plug having a connection portion disposed in the axial hole and between a metal terminal and a center electrode. The connection portion includes: a magnetic substance formed from a Fe-containing oxide; a conductor helically disposed on an outer periphery of the magnetic substance and electrically connected to the metal terminal and the center electrode; and an intermediate member disposed between the magnetic substance and the conductor, and an inner peripheral surface of the insulator and having lower electrical conductivity than the conductor. The conductor includes a base and a conductive layer disposed on an outer periphery of the base and having higher electrical conductivity than the base, and the conductive layer has a thickness of larger than 0.1 μm and equal to or smaller than 25 μm.
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公开(公告)号：US10090646B2
公开(公告)日：2018-10-02
申请号：US15315581
申请日：2015-06-02
发明人： Katsuya Takaoka , Kazuhiro Kurosawa , Kuniharu Tanaka , Hisashi Kozuka , Toshitaka Honda , Hirokazu Kurono , Haruki Yoshida , Hironori Uegaki
摘要： Disclosed is a spark plug capable of suppressing high-frequency noise by improving the material of an electrical connection part between a center electrode and a metal terminal within an axial hole of an insulator. A spark plug has an electrical connection part arranged in an axial hole of an insulator to establish electrical connection between a center electrode and a metal terminal. The electrical connection part includes a conductor having a first crystal phase formed of a Fe-containing oxide and a second crystal phase formed of a conductive metal oxide of perovskite crystal structure.
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公开(公告)号：US09876332B2
公开(公告)日：2018-01-23
申请号：US15606588
申请日：2017-05-26
发明人： Tomoki Kawai
摘要： In a metallic shell, cutting traces are formed on the inner circumferential surface of a trunk portion and the inner circumferential surface of an elongated leg portion. A first portion of a packing is in contact with and disposed between the rear end surface of a ledge portion of the metallic shell and the outer circumferential surface of a step portion of an insulator. A second portion of the packing is in contact with and disposed between the inner circumferential surface of a trunk portion of the metallic shell and the outer circumferential surface of a tubular portion of the insulator. A gap between the inner circumferential surface of the elongated leg portion and the outer circumferential surface of the leg portion is approximately uniform along the entire circumference.
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公开(公告)号：US09843167B2
公开(公告)日：2017-12-12
申请号：US15291601
申请日：2016-10-12
发明人： Hironori Uegaki , Yoshitomo Iwasaki
摘要： An electrically-conductive seal portion of a spark plug includes a large-diameter seal portion, a small-diameter seal portion having an outer diameter smaller than an outer diameter of the large-diameter seal portion, and a tapered seal portion disposed between the large-diameter seal portion and the small-diameter seal portion. An insulator includes a flange portion, a first middle-body portion having an outer diameter smaller than an outer diameter of the flange portion, a second middle-body portion having an outer diameter smaller than an outer diameter of the first middle-body portion, and a leg portion having an outer diameter that tapers toward a tip end of the spark plug. The tapered seal portion is disposed inside the first middle-body portion.
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公开(公告)号：US20170331259A1
公开(公告)日：2017-11-16
申请号：US15481543
申请日：2017-04-07
发明人： Yuichi YAMADA , Yuichi MATSUNAGA
摘要： A tip that contains a noble metal is joined to a joining surface of an electrode base material of a ground electrode via a welded portion. On cross-sections of the tip and the electrode base material in a longitudinal direction of the joining surface, the welded portion has a void above the joining surface, and a continuous distance of the welded portion on the joining surface is less than or equal to 0.5 mm, whereby thermal stress due to a difference in thermal expansion between the tip and the electrode base material can be reduced. A total of continuous distances of the welded portions on the joining surface, are 0.4 times to 0.8 times a length from an end of the tip to another end thereof, whereby joining strength of the welded portion can be assured. Peeling at the tip or falling-off of the tip due to thermal stress can be less likely to occur, whereby durability of the ground electrode can be improved.
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9.发明授权公开(公告)号：US09742159B1
公开(公告)日：2017-08-22
申请号：US15428895
申请日：2017-02-09
发明人： Werner Niessner
摘要： A spark plug for a gas-powered internal combustion engine, having a center conductor, an insulator surrounding the center conductor, a body surrounding the insulator, a center electrode connected in an electrically conductive manner to the center conductor, and at least one ground electrode that is connected in an electrically conductive manner to the body and forms a spark air gap with the center electrode. A shield that shields the spark air gap in the radial direction of the spark plug is located at the front end of the body. The shield includes multiple shield components that are attached to the front end of the body adjacent to one another in the circumferential direction of the spark plug.
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公开(公告)号：US09419415B2
公开(公告)日：2016-08-16
申请号：US14431358
申请日：2013-04-18
发明人： Takamitsu Mizuno , Satoshi Yano
摘要： A spark plug includes an insulator with a through hole, a center electrode disposed at a tip end side of the through hole, a metal terminal nut disposed at a rear end side of the through hole, a resistor disposed in a position between the center electrode and the metal terminal nut inside of the through hole and apart from the center electrode, and a conductive seal that is disposed between the resistor and the center electrode inside of the through hole and contacts both the center electrode and the resistor. A contact surface between the resistor and the conductive seal includes at least one point where a distance in the central axis direction from a virtual plane that includes a rear end of the resistor and is vertical to the central axis is local maximum, and include at least one point where the distance is local minimum.
摘要翻译： 火花塞包括具有通孔的绝缘体，设置在通孔的前端侧的中心电极，设置在通孔的后端侧的金属端子螺母，设置在中心电极 并且金属端子螺母在通孔内部并且与中心电极分开，并且导电密封件设置在通孔内部的电阻器和中心电极之间，并与中心电极和电阻器接触。 电阻器和导电密封件之间的接触表面包括至少一个点，其中包括电阻器的后端并且垂直于中心轴线的虚拟平面在中心轴线方向上的距离是局部最大值，并且至少包括 一点距离是局部最小值。
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