公开(公告)号：US11685970B2

公开(公告)日：2023-06-27

申请号：US17890405

申请日：2022-08-18

Applicant: DENSO CORPORATION ,  ISHIFUKU METAL INDUSTRY CO., LTD.

Inventor： Satoshi Hara ,  Nobuo Abe ,  Kenta Terai ,  Shunsuke Takeya ,  Hayato Yasuhara

IPC: C22C5/04

CPC classification number: C22C5/04

Abstract: An iridium alloy includes iridium, platinum, and tantalum. A content of the platinum in the iridium alloy falls within a range from 5 wt % to 30 wt %, and a content of the tantalum in the iridium alloy falls within a range from 0.3 wt % to 5 wt %.

公开(公告)号：US09184570B2

公开(公告)日：2015-11-10

申请号：US13969868

申请日：2013-08-19

Applicant: DENSO CORPORATION ,  ISHIFUKU METAL INDUSTRY CO., LTD.

Inventor： Yuki Murayama ,  Nobuo Abe ,  Yoshinori Doi ,  Toshiyuki Tomine ,  Shunsuke Yokota

IPC: H01T13/20 ,  H01T13/39

CPC classification number: H01T13/39

Abstract: A spark plug has a center electrode and an earth electrode. The center electrode is faced to the earth electrode so that a spark discharging gap is formed between the center electrode and the earth electrode. An electrode chip is formed on at least one of the center electrode and the earth electrode. The electrode chip has a composition containing 40 to 60 mol % of aluminum and iridium as a remainder thereof. In the composition of the electrode chip, it is possible to replace part of the iridium with 1 to 20 mol % of at least one metal selected from nickel, iron, cobalt, platinum and rhodium.

Abstract translation: 火花塞具有中心电极和接地电极。 中心电极面对接地电极，从而在中心电极和接地电极之间形成火花放电间隙。 电极芯片形成在中心电极和接地电极中的至少一个上。 电极芯片具有含有40〜60摩尔％的铝和铱作为其余部分的组成。 在电极芯片的组成中，可以用1〜20摩尔％的选自镍，铁，钴，铂，铑中的至少一种金属代替部分铱。

公开(公告)号：US09041275B2

公开(公告)日：2015-05-26

申请号：US14299276

申请日：2014-06-09

Applicant: DENSO CORPORATION

Inventor： Nobuo Abe ,  Yuki Murayama

IPC: H01T13/39 ,  H01T21/02 ,  F02P3/02

CPC classification number: H01T13/39 ,  F02P3/02 ,  H01T21/02

Abstract: In a spark plug, a center electrode includes a base member and a discharge chip that has a higher melting point than the base member. The base member and the discharge chip are joined to each other by both a weld and a diffusion layer. The weld is formed, by fusion welding, along an outer periphery of an interface between the base member and the discharge chip into an annular shape. The weld is made up of those parts of the base member and the discharge chip which are molten and mixed together during the fusion welding and solidified after the fusion welding. The diffusion layer is formed radially inside the annular weld. The diffusion layer is made up of those parts of the base member and the discharge chip which are diffused into each other across the interface between the base member and the discharge chip.

Abstract translation: 在火花塞中，中心电极具有底座部件和熔点高于基体部件的放电芯片。 基底部件和放电芯片通过焊接和扩散层彼此接合。 通过熔焊将基体与排出芯片的界面的外周形成为环状。 焊接由在熔融焊接期间熔融混合在一起并在熔焊之后凝固的基础部件和排出芯片的那些部分组成。 扩散层径向地形成在环形焊缝内。 扩散层由基材和放电芯片的那些部分构成，这些部分在基底部件和放电芯片之间的界面上彼此扩散。

公开(公告)号：US10897123B2

公开(公告)日：2021-01-19

申请号：US16844236

申请日：2020-04-09

Applicant: DENSO CORPORATION

Inventor： Nobuo Abe

IPC: H01T13/20 ,  H01T13/32 ,  C22C19/05 ,  H01T13/39 ,  C22C5/04

Abstract: A spark plug includes a center electrode held inside an insulator, a ground electrode that is provided on a housing holding the insulator and faces the center electrode, and a composite chip formed on at least one of the electrodes. In the composite chip, a core having a mount integral with an electrode base material is formed from a Ni alloy material, and a surface layer having a discharge portion covering a protrusion end surface of the core and a side surface coating covering a side surface is formed from a Pt alloy material. The coating thickness S of the side surface coating in the radial direction, the outer diameter D1 of the discharge portion, and the coating length L1 of the side surface coating in the axial direction satisfy: S≥D1/20+L1/10−0.005 mm.

公开(公告)号：US10439367B2

公开(公告)日：2019-10-08

申请号：US16088971

申请日：2017-03-24

Applicant: DENSO CORPORATION

Inventor： Masayuki Tamura ,  Nobuo Abe ,  Masamichi Shibata

IPC: H01T13/34 ,  H01T13/52 ,  H01T13/39 ,  H01T21/02 ,  H01T13/32 ,  H01T13/08

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.

公开(公告)号：US09077158B2

公开(公告)日：2015-07-07

申请号：US14040958

申请日：2013-09-30

Applicant: DENSO CORPORATION ,  ISHIFUKU Metal Industry Co., Ltd.

Inventor： Yuki Murayama ,  Nobuo Abe ,  Yoshinori Doi ,  Toshiyuki Tomine

IPC: H01T13/20 ,  H01T13/39

CPC classification number: H01T13/39

Abstract: A spark plug for use in an internal combustion engine has a center electrode, an earth electrode, and an electrode chip formed on at least one of the center electrode and the earth electrode. A spark discharge gap is formed between the center electrode and the earth electrode. The electrode chip has a base section, a chromium rich layer formed on at least a part of the base section, and a diffusion layer formed between the base section and the chromium rich layer. The base section contains chromium within a range of 5 to 45 mass %, an element X within a range of 0.5 to 25 mass %, and a remainder composed of tungsten and unavoidable impurity. The chromium rich layer is larger in content of chromium than the base section. The element X contained in the base section is comprised of at least one of molybdenum, silicon, aluminum and lead.

Abstract translation: 用于内燃机的火花塞具有形成在至少一个中心电极和接地电极上的中心电极，接地电极和电极芯片。 在中心电极和接地电极之间形成火花放电间隙。 所述电极芯片具有基部，在所述基部的至少一部分上形成的富铬层，以及形成在所述基部与所述富铬层之间的扩散层。 基部包含5〜45质量％范围的铬，0.5〜25质量％范围内的元素X，余量由钨和不可避免的杂质构成。 铬含量比基体部分含铬量大。 包含在基部中的元素X由钼，硅，铝和铅中的至少一种构成。

公开(公告)号：US11757261B2

公开(公告)日：2023-09-12

申请号：US17980033

申请日：2022-11-03

Applicant: DENSO CORPORATION

Inventor： Yuji Kaji ,  Nobuo Abe ,  Naoto Hayashi

IPC: H01T13/32 ,  H01T13/34 ,  H01T13/08 ,  H01T13/39

CPC classification number: H01T13/39 ,  H01T13/32

Abstract: 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.

公开(公告)号：US10323303B2

公开(公告)日：2019-06-18

申请号：US15771670

申请日：2016-10-31

Applicant: Sumitomo Electric Industries, Ltd. ,  DENSO CORPORATION

Inventor： Hajime Ota ,  Kazuo Yamazaki ,  Naoki Sugihara ,  Nobuo Abe

IPC: H01T13/39 ,  C22F1/10 ,  C22C19/05 ,  F02P15/00 ,  G01M15/04

Abstract: An electrode material is composed of at least 0.2 mass % and at most 1.0 mass % of Y, at least 0 mass % and at most 0.2 mass % of Al, at least 0.2 mass % and at most 1.6 mass % of Si, at least 0.05 mass % and at most 1.0 mass % of Cr, at least 0.05 mass % and at most 0.5 mass % of Ti, at least 0.1 mass % and at most 0.5 mass in total of one or more elements selected from among Yb, Sb, Ir, Zr, Hf, Pt, Re, Pd, Rh, Ru, Nb, V, W, Mo, and Ta, and a remainder composed of Ni and an inevitable impurity.

公开(公告)号：US09181918B2

公开(公告)日：2015-11-10

申请号：US13655587

申请日：2012-10-19

Applicant: DENSO CORPORATION

Inventor： Nobuo Abe

IPC: F02P13/00 ,  H01T13/08 ,  H01T21/02 ,  H01T13/20 ,  H01T13/32 ,  H01T13/39 ,  F02F1/24 ,  F02F11/00

CPC classification number: F02P13/00 ,  F02F1/242 ,  F02F11/002 ,  H01T13/08 ,  H01T13/20 ,  H01T13/32 ,  H01T13/39 ,  H01T21/02 ,  H01T21/04

Abstract: An assembly includes an engine main body, a spark plug and a gasket. The spark plug is mounted to the engine main body by tightening a male-threaded portion of the spark plug into a female-threaded portion of the engine main body with the gasket elastically deformed between a seat surface of the engine main body and a seating surface of the spark plug. The gasket is made of a metallic material whose yield stress or 0.2% proof stress is not lower than 200 N/mm2. The gasket has first and second contact surfaces respectively in contact with the seating surface of the spark plug and the seat surface of the engine main body. The first and second contact surfaces of the gasket are each formed as a part of a curved surface that has a convex shape, and are offset from each other in a radial direction of the spark plug.

Abstract translation: 组件包括发动机主体，火花塞和垫圈。 火花塞通过将火花塞的阳螺纹部分拧紧到发动机主体的内螺纹部分中而被安装到发动机主体，垫圈在发动机主体的座表面之间弹性变形， 的火花塞。 垫圈由屈服应力或0.2％屈服应力不低于200N / mm2的金属材料制成。 垫圈具有分别与火花塞的座面和发动机主体的座面接触的第一和第二接触表面。 垫圈的第一和第二接触表面各自形成为具有凸形的弯曲表面的一部分，并且在火花塞的径向方向上彼此偏移。

公开(公告)号：US08884504B2

公开(公告)日：2014-11-11

申请号：US14355817

申请日：2012-10-31

Applicant: Denso Corporation

Inventor： Ken Hanashi ,  Nobuo Abe

IPC: H01T13/20

CPC classification number: H01T13/20 ,  F02P13/00 ,  F02P15/005 ,  H01T13/32

Abstract: A spark plug for an internal combustion engine is provided, which includes a housing, an insulation porcelain, a center electrode and a ground electrode. At least one of a tip portion of the center electrode and an opposing portion of the ground electrode is provided with a projection portion. At least one of the projection portions has a cross section perpendicular to the axial direction of the plug, the cross section having a minimum curvature radius portion and being in a specific shape that satisfies a predetermined requirement. The requirement is that, when a first straight line, a first line segment and a second straight line are provided, and when the cross section is divided into a first region and a second region by the second straight line, the second region has an area larger than the area of the first region.

Abstract translation: 提供了一种用于内燃机的火花塞，其包括外壳，绝缘瓷，中心电极和接地电极。 中心电极的前端部分和接地电极的相对部分中的至少一个设置有突出部分。 突起部中的至少一个具有与插头的轴向垂直的截面，该截面具有最小曲率半径部分，并且具有满足预定要求的特定形状。 要求的是，当设置第一直线，第一线段和第二直线时，并且当横截面被第二直线分成第一区域和第二区域时，第二区域具有区域 大于第一区域的面积。