公开(公告)号：US20170077679A1

公开(公告)日：2017-03-16

申请号：US15266072

申请日：2016-09-15

申请人： DENSO CORPORATION

发明人： Masataka DEGUCHI ,  Masamichi SHIBATA ,  Kanechiyo TERADA ,  Tetsuya MIWA ,  Hironori OSAMURA ,  Yuuki TSUKAMOTO

IPC分类号： H01T13/16 ,  F02P15/00 ,  H01T13/38

CPC分类号： H01T13/16 ,  F02P15/00 ,  H01T13/00 ,  H01T13/14 ,  H01T13/32

摘要： A spark plug for an internal combustion engine is provided which includes a housing, a porcelain insulator, a center electrode, and an annular ground electrode. The housing has a small-diameter portion which has a smaller inner diameter and defines a front end thereof. The ground electrode is secured to a front end surface of the small-diameter portion and forms a spark gap between itself and an outer periphery of the center electrode. A pocket is formed between the inner periphery of the housing and a portion of the porcelain insulator which is located closer to a front end of the porcelain insulator than the mounting shoulder is. An air vent extends from outside the ground electrode in a radial direction of the spark plug to the pocket to establish communication between the pocket and the combustion chamber of the internal combustion engine.

摘要翻译： 提供了一种用于内燃机的火花塞，其包括壳体，瓷绝缘体，中心电极和环形接地电极。 壳体具有小直径部分，其具有较小的内径并限定其前端。 接地电极被固定到小直径部分的前端表面，并且在其自身与中心电极的外周之间形成火花隙。 在壳体的内周和陶瓷绝缘体的比安装肩部更靠近瓷绝缘体的前端的部分之间形成有口袋。 排气孔从火花塞的径向方向从接地电极的外部延伸到口袋，以在内燃机的口袋和燃烧室之间建立连通。

公开(公告)号：US20160064903A1

公开(公告)日：2016-03-03

申请号：US14842073

申请日：2015-09-01

申请人： DENSO CORPORATION

发明人： Masataka DEGUCHI ,  Hironori OSAMURA ,  Kanechiyo TERADA ,  Junichi WADA ,  Masamichi SHIBATA ,  Yuuki TSUKAMOTO

IPC分类号： H01T13/32 ,  H01T13/34 ,  H01T21/02

CPC分类号： H01T13/32 ,  H01T13/34 ,  H01T13/467 ,  H01T21/02

摘要： A spark plug includes a tubular housing, a tubular insulator retained in the housing, a center electrode secured in the insulator with a distal end portion of the center electrode protruding outside the insulator, and an annular ground electrode fixed to a distal end of the housing. The housing has, at the distal end thereof, a small-inner diameter portion that has a smaller inner diameter than other portions of the housing. The annular ground electrode is arranged on a distal end surface of the small-inner diameter portion of the housing so that an inner circumferential surface of the ground electrode faces an outer circumferential surface of the distal end portion of the center electrode through a spark gap formed therebetween. The outer diameter of the ground electrode is less than the outer diameter of the distal end surface of the small-inner diameter portion of the housing.

摘要翻译： 火花塞包括管状壳体，保持在壳体中的管状绝缘体，固定在绝缘体中的中心电极，其中心电极的远端部突出于绝缘体外部，以及环形接地电极，固定到壳体的远端 。 壳体在其远端处具有比壳体的其它部分更小的内径的小内径部分。 环形接地电极设置在壳体的小内径部分的远端表面上，使得接地电极的内周面通过形成的火花间隙面对中心电极的远端部分的外圆周表面 之间。 接地电极的外径小于壳体的小内径部分的远端表面的外径。