| 摘要 |
A spark plug with a particular configuration, particularly in the area of a gasket that seals between a shell and insulator, increases the mechanical strength of the spark plug and helps prevent breaking, cracking and/or other failures in the insulator. The spark plug is designed such that the shell, insulator and gasket, which may be in the form of a sleeve-like cylindrical gasket or a ring-like annular gasket, work together to provide better support for the insulator against axial and/or radial stresses. This improved support can offset certain stresses, such as radial stress RS that can be exerted against the insulator core nose when the engine experiences knocking or misfiring.
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