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公开(公告)号：EP1102373A3
公开(公告)日：2003-05-14
申请号：EP00310115.1
申请日：2000-11-14
CPC分类号： H01T13/20 , H01T13/467
摘要： A spark plug includes a metallic shell (5) having a stepped portion (5c); an insulator (3) disposed inside the metallic shell (5), while being engaged with the stepped portion (5c) of the metallic shell (5), and having an axially extending through-hole (3d); a center electrode (2) fixed within the through-hole (3d) of the insulator (3); and a ground electrode (4) having a tip end portion (4a) bent toward the center electrode (2) to thereby form a spark discharge gap (g). The insulator (3) is formed such that the outer diameter of the insulator (3) decreases toward the tip end side from an engagement position at which the insulator (3) engages the stepped portion (5c) and such that the diameter decreases stepwise at an axial position between the engagement position and the tip end of the insulator (3). The diameter reduction ratio Y1 = D1/d1 is 0.6 or less in a region of at least 2 mm extending from the tip end surface (3b) of the insulator (3) toward the base end side, wherein D1 represents the outer diameter of the insulator (3) measured at an arbitrarily determined axial position, and d1 represents the inner diameter of the tip end portion (5a) of the metallic shell (5). Further, a clearance ratio Y2 = (d1-D1)/d1 is 0.4 or greater in a region of at least 1 mm extending from the tip end surface (5b) of the metallic shell (5) toward the base end side.
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公开(公告)号：EP0964490A3
公开(公告)日：2002-11-06
申请号：EP99304555.8
申请日：1999-06-11
CPC分类号： H01T13/467 , H01T13/32
摘要： In a spark plug, a main air gap (A) is formed between a parallel ground electrode (11) and the end face of a central electrode (2), a semi-surface gap (B) is formed between the end face (12C) of a semi-surface ground electrode (12) and the side face (2A) of the central electrode (2) and a semi-surface air gap (C) is formed between the end face (12C) and the side face (1E) of insulator. In addition, difference in a level E between the height of the lower end face (1D) of the insulator (1) and the height of the upper edge (12B) of the end face 12C of the semi-surface ground electrode 12 is E ≤ +0.7 mm, the distance B of the semi-surface gap (B) is longer than the distance A of the main air gap (A) and the distance C of the semi-surface air gap (C) is shorter than the distance A of the main air gap (A).
摘要翻译： 在火花塞中，在并联接地电极（11）和中心电极（2）的端面之间形成有主气隙（A），在端面（12C）之间形成有半面间隙 ）和半面空气（C）之间形成有半面接地电极（12）和中心电极（2）的侧面（2A）和半表面气隙（C）的端面（12C）和侧面 ）绝缘子。 此外，绝缘体（1）的下端面（1D）的高度与半表面接地电极12的端面12C的上边缘（12B）的高度之间的电平差E为E ≤+ 0.7mm，半表面间隙（B）的距离B比主气隙（A）的距离A长，半表面气隙（C）的距离C比距离 主气隙A（A）。
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公开(公告)号：EP0812043B1
公开(公告)日：2002-04-03
申请号：EP97303906.8
申请日：1997-06-06
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35.发明授权
公开(公告)号：EP0627622B1
公开(公告)日：2001-10-17
申请号：EP94303823.2
申请日：1994-05-26
IPC分类号： G01N27/62
CPC分类号： G01R19/0061 , G01N27/626 , G01R31/006
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公开(公告)号：EP0800247B1
公开(公告)日：2001-09-19
申请号：EP97302332.8
申请日：1997-04-04
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37.发明授权A multi-polarity type spark plug for use in an internal combustion engine 失效Multipolarzündkerze用于内燃机
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公开(公告)号：EP0964490A2
公开(公告)日：1999-12-15
申请号：EP99304555.8
申请日：1999-06-11
CPC分类号： H01T13/467 , H01T13/32
摘要： In a spark plug, a main air gap (A) is formed between a parallel ground electrode (11) and the end face of a central electrode (2), a semi-surface gap (B) is formed between the end face (12C) of a semi-surface ground electrode (12) and the side face (2A) of the central electrode (2) and a semi-surface air gap (C) is formed between the end face (12C) and the side face (1E) of insulator. In addition, difference in a level E between the height of the lower end face (1D) of the insulator (1) and the height of the upper edge (12B) of the end face 12C of the semi-surface ground electrode 12 is E ≤ +0.7 mm, the distance B of the semi-surface gap (B) is longer than the distance A of the main air gap (A) and the distance C of the semi-surface air gap (C) is shorter than the distance A of the main air gap (A).
摘要翻译： 在火花塞中，在平行的接地电极（11）和中心电极（2）的端面之间形成主空气间隙（A），在端面（12C）之间形成半表面间隙（B） ）和端面（12C）与侧面（1E）之间形成半表面接地电极（12）和中心电极（2）的侧面（2A）以及半表面空气间隙（C） ）绝缘子。 另外，绝缘体（1）的下端面（1D）的高度与半面接地电极12的端面12C的上缘（12B）的高度之间的高度E的差为E ≤+ 0.7mm，半表面间隙（B）的距离B比主气隙（A）的距离A更长，并且半表面间隙（C）的距离C比距离 A的主要气隙（A）。
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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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