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公开(公告)号：US09698573B2
公开(公告)日：2017-07-04
申请号：US14076840
申请日：2013-11-11
Applicant: FEDERAL-MOGUL IGNITION COMPANY
Inventor： William J. Walker, Jr.
Abstract: A method for making an extruded insulator for a spark plug in a manner that minimizes pores, relics and/or other defects in the insulator microstructure so that the overall dielectric strength or performance of the insulator is improved. The method may be used to manufacture an extruded insulator that avoids many of the drawbacks associated with such defects, but also has a stepped internal bore for receiving a center electrode. In one embodiment, the method uses a multi-phase extrusion process to extrude a ceramic paste around an elongated arbor and form an extruded section, and then removes the arbor from the extruded section to reveal a stepped internal bore.
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公开(公告)号：US09219351B2
公开(公告)日：2015-12-22
申请号：US14577174
申请日：2014-12-19
Applicant: Federal-Mogul Ignition Company
Inventor： William J. Walker, Jr.
Abstract: A spark plug (20) for igniting a mixture of fuel and air of an internal combustion engine comprises a center electrode (22) and a ground electrode (24). At least one of the electrodes (22, 24) includes a body portion (28, 30) formed of thermally conductive material and a firing tip (32, 34) disposed on the body portion (28, 30). The firing tip (32, 34) includes a ceramic material, providing an exposed firing surface (36, 38). The ceramic material is an electrically conductive, monolithic ceramic material. The ceramic material of the firing tip (32, 34) includes at least one perovskite structure and/or at least one a spinel structure.
Abstract translation: 用于点燃内燃机的燃料和空气的混合物的火花塞（20）包括中心电极（22）和接地电极（24）。 电极（22,24）中的至少一个包括由导热材料形成的主体部分（28,30）和设置在主体部分（28,30）上的击发尖端（32,34）。 烧制尖端（32,34）包括陶瓷材料，提供暴露的烧制表面（36,38）。 陶瓷材料是导电的整体陶瓷材料。 烧制尖端（32,34）的陶瓷材料包括至少一种钙钛矿结构和/或至少一种尖晶石结构。
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