公开(公告)号：US09287685B2

公开(公告)日：2016-03-15

申请号：US14651040

申请日：2013-12-10

Applicant: DENSO CORPORATION

Inventor： Takanobu Aochi ,  Takayuki Inohara ,  Shinichi Okabe ,  Masamichi Shibata ,  Kaori Doi

IPC: H01T13/20 ,  H01T13/32

CPC classification number: H01T13/32 ,  H01T1/20 ,  H01T13/02 ,  H01T13/20

Abstract: A spark plug for an internal combustion engine has a housing, an insulator, a center electrode, a ground electrode, and a tip projecting portion. The tip projecting portion has an air guiding surface. In the spark plug, when viewed from a plug axial direction, a straight line that connects the center, in the plug circumferential direction, of the erect portion of the ground electrode and a center point of the center electrode is a straight line. An extension line of the air guiding surface is a straight line. A distance between an intersection, between the straight line and the straight line, and the center point of the center electrode is a (positive towards the side moving away from the erect portion. An angle formed by the straight line and the straight line is b. A diameter of the housing is D. At this time, all of b≧−67.8×(a/D)+27.4, b≦−123.7×(a/D)+64.5, −0.4≦(a/D)≦0.4, and 0°

Abstract translation: 用于内燃机的火花塞具有壳体，绝缘体，中心电极，接地电极和尖端突出部分。 尖端突出部具有空气引导面。 在火花塞中，当从插头轴向观察时，将接地电极的直立部分的中心与插塞圆周方向连接的直线与中心电极的中心点成直线。 导气面的延长线是直线。 在直线与直线之间的交点之间的距离和中心电极的中心点之间的距离为（朝着直立部分移动的一侧为正），由直线和直线形成的角度为b （a / D）+27.4，b＆nlE; -123.7×（a / D）+64.5，-0.4＆nlE;（a / D） ＆nlE; 0.4和0°

公开(公告)号：US09371806B2

公开(公告)日：2016-06-21

申请号：US14780801

申请日：2014-01-28

Applicant: DENSO CORPORATION

Inventor： Takanobu Aochi ,  Takayuki Inohara ,  Shinichi Okabe ,  Masamichi Shibata ,  Noriaki Nishio

IPC: H01T13/02 ,  F02M57/06 ,  H01T13/20

CPC classification number: F02M57/06 ,  F02P13/00 ,  H01T13/02 ,  H01T13/20 ,  H01T13/32

Abstract: A spark plug 1 includes a housing 2, an insulator 3, a center electrode 4 held inside the insulator 3 such that a distal end portion 41 protrudes, a ground electrode 5 including a standing portion 51 and an opposing portion 52, and a guide member 22 that has a guide surface 221 facing the standing portion 51 of the ground electrode 5 and functions to guide a flow of an air-fuel mixture in a combustion chamber of an internal combustion engine to a spark discharge gap G formed between the center electrode 4 and the opposing portion 52 of the ground electrode 5. The opposing portion 52 of the ground electrode 5 has an opposing surface 521 that opposes the center electrode 4, a back surface 522 on the opposite axial side to the opposing surface 521, and a pair of side surfaces 523 and 524 that connect the opposing surface 521 and the back surface 522. Of the pair of side surfaces 523 and 524, at least the side surface 523 on the guide member 22 side is formed so as to make an obtuse angle with the opposing surface 521.

Abstract translation: 火花塞1包括壳体2，绝缘体3，保持在绝缘体3内部的中心电极4，使得前端部41突出，包括立起部51和相对部52的接地电极5和引导构件 22，其具有面对接地电极5的竖立部分51的引导表面221，并且用于将内燃机的燃烧室中的空气燃料混合物的流动引导到形成在中心电极4之间的火花放电间隙G 和接地电极5的相对部分52.接地电极5的相对部分52具有与中心电极4相对的相对表面521，与相对表面521相对的轴向侧上的后表面522和一对 连接相对表面521和后表面522的侧表面523和524。在一对侧表面523和524中，至少引导构件22侧的侧表面523形成为形成钝角 与相对表面521。

公开(公告)号：US08963408B2

公开(公告)日：2015-02-24

申请号：US14101386

申请日：2013-12-10

Applicant: Denso Corporation

Inventor： Masamichi Shibata ,  Takayuki Inohara ,  Shinichi Okabe ,  Takanobu Aochi ,  Kaori Doi

IPC: H01T13/20 ,  H01T13/02

CPC classification number: H01T13/02 ,  H01T13/32

Abstract: A spark plug for internal combustion engines is provided, where the spark plug includes a cylindrical housing, a cylindrical insulation porcelain part, a center electrode, and a ground electrode. The insulation porcelain is housed in the housing and the center electrode is held inside the insulation porcelain. The ground electrode protrudes from a top end portion of the housing. A spark discharge gap is left between the ground and center electrodes. Further, first to third projections are formed on the top end portion. The first projection is opposed to the ground electrode with the center electrode therebetween. The second projection is closer to the ground electrode than to the first projection. The third projection is closer to the first projection than to the ground electrode.

Abstract translation: 提供了一种用于内燃机的火花塞，其中火花塞包括圆柱形壳体，圆柱形绝缘瓷部件，中心电极和接地电极。 绝缘瓷被容纳在壳体中，中心电极保持在绝缘瓷内。 接地电极从壳体的顶端部突出。 火花放电间隙留在接地和中心电极之间。 此外，在顶端部形成有第一至第三突起。 第一突起与其间具有中心电极的接地电极相对。 第二突起比第一突起更靠近接地电极。 第三投影比接地电极更靠近第一投影。