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US09236713B2 Spark plug having improved ground electrode orientation and method of forming 有权
具有改进的接地电极取向和形成方法的火花塞

Spark plug having improved ground electrode orientation and method of forming
Abstract:
A spark plug (20) for being threaded into a cylinder head (28) includes a shell (24) with threads (26) disposed at a predetermined angled relative to the ground electrode (34). The position of the threads (26) relative to the ground electrode (34) places the ground electrode (34) in a predetermined position in the combustion chamber (22) and relative to components of the engine, thus allowing the ground electrode (34) to provide a robust and reliable ignition. The threads (26) are formed by a thread forming apparatus (102) that includes an orientation tool (38) to position the ground electrode (34) relative to a thread forming apparatus (102), allowing the thread forming apparatus (102) to form the threads (26) at the desired angle (α).
Abstract(Chinese):

用于螺纹连接到气缸盖（28）中的火花塞（20）包括具有相对于接地电极（34）以预定角度设置的螺纹（26）的外壳（24）。 螺纹（26）相对于接地电极（34）的位置将接地电极（34）放置在燃烧室（22）中并相对于发动机部件的预定位置，从而允许接地电极（34） 提供坚固可靠的点火。 螺纹（26）由螺纹形成设备（102）形成，该螺纹成形设备包括定位工具（38），用于相对于螺纹成形设备（102）定位接地电极（34），允许螺纹成型设备（102） 以所需的角度（α）形成螺纹（26）。

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