公开(公告)号：US09231378B2

公开(公告)日：2016-01-05

申请号：US14299382

申请日：2014-06-09

Applicant: DENSO CORPORATION

Inventor： Masataka DeGuchi

IPC: H01T13/20 ,  H01T13/00 ,  F02P15/00 ,  H01T13/40

CPC classification number: H01T13/20 ,  F02P3/055 ,  F02P11/00 ,  F02P13/00 ,  F02P15/00 ,  H01T13/40

Abstract: A spark plug for an internal combustion engine includes a center electrode, a tubular insulator, a tubular metal shell, a ground electrode and an overvoltage preventer. The insulator has the center electrode inserted and held therein. The metal shell has the insulator inserted and held therein such that a proximal part of the insulator is exposed from the metal shell. The ground electrode is joined to a distal end of the metal shell and faces the center electrode through a spark gap formed between the center and ground electrodes. The overvoltage preventer prevents a voltage higher than or equal to a threshold voltage from being applied across the spark gap. The overvoltage preventer is arranged in the proximal part of the insulator so as to be positioned outside the metal shell and farther than the metal shell from the spark gap.

Abstract translation: 一种用于内燃机的火花塞包括中心电极，管状绝缘体，管状金属壳，接地电极和过电压防止器。 绝缘子具有插入并保持在其中的中心电极。 金属壳体具有插入并保持在其中的绝缘体，使得绝缘体的近端部分从金属壳体露出。 接地电极通过形成在中心电极和接地电极之间的火花间隙连接到金属壳体的远端并面对中心电极。 过电压防止器防止高于或等于阈值电压的电压施加在火花隙上。 过电压防止器布置在绝缘体的近端部分中，以便位于金属壳体的外侧，并且距金属壳体远离火花隙。