公开(公告)号：US20140318490A1

公开(公告)日：2014-10-30

申请号：US14355708

申请日：2012-10-31

Applicant: DENSO CORPORATION

Inventor： Ken Hanashi

IPC: H01T13/02

CPC classification number: H01T13/02 ,  F02P13/00 ,  H01T1/22 ,  H01T13/20 ,  H01T13/32

Abstract: A spark plug for an internal combustion engine includes a housing, an insulation porcelain, a center electrode and a ground electrode. Both of a tip portion of the center electrode and an opposing portion of the ground electrode are provided with respective projection portions which are projected toward a spark discharge gap. At least one of the projection portions has an opposing face that confronts the spark discharge gap and is inclined with respect to a plane perpendicular to an axial direction of the plug. The spark discharge gap is configured to be gradually enlarged, in one direction perpendicular to the axial direction of the plug, from a narrow gap on one end side toward a wide gap on the other end side.

Abstract translation: 内燃机的火花塞包括壳体，绝缘瓷，中心电极和接地电极。 中心电极的尖端部分和接地电极的相对部分均设有朝向火花放电间隙突出的各自的突出部分。 突起部中的至少一个具有面对火花放电间隙的相对面，并且相对于与插头的轴向垂直的平面倾斜。 火花放电间隙被配置为在垂直于插头的轴向的一个方向上从一端侧的窄间隙向另一端侧的宽间隙逐渐扩大。

公开(公告)号：US20140265816A1

公开(公告)日：2014-09-18

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。

公开(公告)号：US10938186B2

公开(公告)日：2021-03-02

申请号：US16905118

申请日：2020-06-18

Applicant: DENSO CORPORATION

Inventor： Ryohei Akiyoshi ,  Ken Hanashi ,  Masamichi Shibata

IPC: H01T13/39 ,  H01T13/32

Abstract: A spark plug electrode is provided, in which an electrode member in which a total of 0.3 to 7.5 wt % of at least one of Ta and Nb is added to an IrRh alloy is provided at a discharge part.

公开(公告)号：US20200321756A1

公开(公告)日：2020-10-08

申请号：US16905118

申请日：2020-06-18

Applicant: Denso Corporation

Inventor： Ryohei Akiyoshi ,  Ken Hanashi ,  Masamichi Shibata

IPC: H01T13/39 ,  H01T13/32

Abstract: A spark plug electrode is provided, in which an electrode member in which a total of 0.3 to 7.5 wt % of at least one of Ta and Nb is added to an IrRh alloy is provided at a discharge part.

公开(公告)号：US09482203B2

公开(公告)日：2016-11-01

申请号：US14355967

申请日：2012-10-31

Applicant: DENSO CORPORATION

Inventor： Ken Hanashi

IPC: H01T13/20 ,  F02P15/00 ,  F02P13/00 ,  H01T13/32 ,  H01T13/46 ,  H01T13/14

CPC classification number: F02P15/00 ,  F02P13/00 ,  H01T13/14 ,  H01T13/32 ,  H01T13/467

Abstract: A spark plug is provided, which includes a housing, an insulation porcelain, a center electrode, a main ground electrode, a first sub ground electrode and a second sub ground electrode. The first and second sub ground electrode are arranged being opposed to each other. Requirements of Hs1

Abstract translation: 提供火花塞，其包括壳体，绝缘瓷，中心电极，主接地电极，第一子接地电极和第二子接地电极。 第一和第二子接地电极被布置为彼此相对。 满足Hs1

公开(公告)号：US09343875B2

公开(公告)日：2016-05-17

申请号：US14355708

申请日：2012-10-31

Applicant: DENSO CORPORATION

Inventor： Ken Hanashi

IPC: H01T13/02 ,  F02P13/00 ,  H01T13/32 ,  H01T13/20 ,  H01T1/22

CPC classification number: H01T13/02 ,  F02P13/00 ,  H01T1/22 ,  H01T13/20 ,  H01T13/32

Abstract: A spark plug for an internal combustion engine includes a housing, an insulation porcelain, a center electrode and a ground electrode. Both of a tip portion of the center electrode and an opposing portion of the ground electrode are provided with respective projection portions which are projected toward a spark discharge gap. At least one of the projection portions has an opposing face that confronts the spark discharge gap and is inclined with respect to a plane perpendicular to an axial direction of the plug. The spark discharge gap is configured to be gradually enlarged, in one direction perpendicular to the axial direction of the plug, from a narrow gap on one end side toward a wide gap on the other end side.

Abstract translation: 内燃机的火花塞包括壳体，绝缘瓷，中心电极和接地电极。 中心电极的尖端部分和接地电极的相对部分均设有朝向火花放电间隙突出的各自的突出部分。 突起部中的至少一个具有面对火花放电间隙的相对面，并且相对于与插头的轴向垂直的平面倾斜。 火花放电间隙被配置为在垂直于插头的轴向的一个方向上从一端侧的窄间隙向另一端侧的宽间隙逐渐扩大。