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公开(公告)号：EP0863591B1
公开(公告)日：2000-09-06
申请号：EP98301672.6
申请日：1998-03-06
IPC分类号： H01T13/52
CPC分类号： H01T13/52 , F02B2275/18
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公开(公告)号：EP0872927A2
公开(公告)日：1998-10-21
申请号：EP98302927.3
申请日：1998-04-15
IPC分类号： H01T13/20
摘要： In a spark plug, a cylindrical metal shell (1) is provided whose inner wall has a rear section and a front section to respectively serve as a diameter-increased section and a diameter-decreased section with a seat portion (11) as a boundary therebetween. An insulator (2) is fixedly placed within the metal shell (1) so that a front end surface (21) of the insulator (2) extends beyond a front end surface (12) of the metal shell (1) with a shoulder portion (231) of an insulator nose (23) engaged against the seat portion (11) of the metal shell (1) by way of a packing (10). A center electrode (3) is fixedly placed within an axial bore (22) of said insulator (2), A ground electrode (4) is connected to the front end surface (12) of the metal shell (1), and bent so that a front end surface (41) of the ground electrode (4) opposes an outer surface (311) of the center electrode (3). The outer surface (311) and a front end surface (31) of the center electrode (3) are provided to respectively serve as a firing portion so as to form a spark discharge gap (Go) with the front end surface (41) of the ground electrode (4), the front end surface (41) of the ground electrode (4) forming an air gap (G) with an outer surface (25) of the insulator (2) so as to release creeping spark discharges along a front end surface (21) of the insulator (2).
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公开(公告)号：EP0872927A3
公开(公告)日：1998-12-23
申请号：EP98302927.3
申请日：1998-04-15
IPC分类号： H01T13/20
摘要： In a spark plug, a cylindrical metal shell (1) is provided whose inner wall has a rear section and a front section to respectively serve as a diameter-increased section and a diameter-decreased section with a seat portion (11) as a boundary therebetween. An insulator (2) is fixedly placed within the metal shell (1) so that a front end surface (21) of the insulator (2) extends beyond a front end surface (12) of the metal shell (1) with a shoulder portion (231) of an insulator nose (23) engaged against the seat portion (11) of the metal shell (1) by way of a packing (10). A center electrode (3) is fixedly placed within an axial bore (22) of said insulator (2), A ground electrode (4) is connected to the front end surface (12) of the metal shell (1), and bent so that a front end surface (41) of the ground electrode (4) opposes an outer surface (311) of the center electrode (3). The outer surface (311) and a front end surface (31) of the center electrode (3) are provided to respectively serve as a firing portion so as to form a spark discharge gap (Go) with the front end surface (41) of the ground electrode (4), the front end surface (41) of the ground electrode (4) forming an air gap (G) with an outer surface (25) of the insulator (2) so as to release creeping spark discharges along a front end surface (21) of the insulator (2).
摘要翻译： 在火花塞中，设置有内壁具有后部和前部的圆筒状的金属壳（1），以座部（11）为界分别作为扩径部和缩径部 其间。 绝缘体（2）固定地放置在金属壳体（1）内，使得绝缘体（2）的前端表面（21）延伸超出金属壳体（1）的前端表面（12），并具有肩部 （1）的座部分（11）接合的绝缘子鼻部（23）的端部（231）通过密封件（10）接合在金属壳体（1）的座部分（11）上。 中心电极（3）固定地放置在所述绝缘体（2）的轴向孔（22）内。接地电极（4）连接到金属壳体（1）的前端表面（12），并弯曲 所述接地电极（4）的前端表面（41）与所述中心电极（3）的外表面（311）相对。 中心电极（3）的外表面（311）和前端表面（31）被设置成分别用作点火部分以便与中心电极（3）的前端表面（41）形成火花放电间隙（Go） 接地电极（4），接地电极（4）的前端表面（41）与绝缘体（2）的外表面（25）形成气隙（G），以释放沿着 （2）的前端表面（21）。
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公开(公告)号：EP0863591A1
公开(公告)日：1998-09-09
申请号：EP98301672.6
申请日：1998-03-06
IPC分类号： H01T13/52
CPC分类号： H01T13/52 , F02B2275/18
摘要： In a semi-creeping discharge type spark plug, a cylindrical metal shell (1) and an insulator (2) are provided, the latter of which has an axial bore (22) and placed within the metal shell (1) so that a front end of the insulator (2) extends beyond the metal shell (1). A center electrode (3) is placed within the axial bore (22) of the insulator (2) so that a front end surface edge (311) of the center electrode (3) retracts by 0.1~ 0.6 mm behind from a front end surface (23) of the insulator (2) . A ground electrode (4), one end of which is connected to a front end (11) of the metal shell (1), and the other end of which is bent to oppose an outer surface of the insulator (2) so as to form an air-gap (g1) therebetween while permitting creeping spark discharges running along said front end surface (23) of said insulator (2). A foward edge portion (42) of a front end surface (41) of the ground electrode (4) extends by 0.0 ~ 1.0 mm forward from the front end surface (23) of the insulator (2).
摘要翻译： 在半爬电式火花塞中，设置有圆柱形金属壳（1）和绝缘体（2），后者具有轴向孔（22）并放置在金属壳体（1）内，使得前部 绝缘体（2）的端部延伸超过金属壳（1）。 中心电极（3）被放置在绝缘体（2）的轴向孔（22）内，使得中心电极（3）的前端表面边缘（311）从前端表面向后缩回0.1mm和0.6mm （2）的绝缘体（23）。 接地电极（4），其一端连接到金属壳（1）的前端（11），另一端弯曲成与绝缘体（2）的外表面相对，以便 在其间形成气隙（g1），同时允许沿着所述绝缘体（2）的所述前端表面（23）延伸的蠕变火花放电。 接地电极（4）的前端表面（41）的前缘部分（42）从绝缘体（2）的前端表面（23）向前延伸0.0mm和1.0mm。
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