Ignition apparatus having spark plug connection which supplies isolation between plug and apparatus

摘要

An ignition coil has a high voltage connector for connecting a high voltage output to a spark plug. The connector includes a terminal having a base, an annular sidewall axially extending from the base defining an interior, and a circumferentially-extending groove on an interior surface of the sidewall. A contact assembly of a spring clip sandwiched between a pair of wave washers is disposed in the groove, with a spring contact being disposed between the contact assembly and the base. The spring rates of the wave washers and the contact spring are low relative to the mass of the ignition coil, resulting in a low natural frequency for the overall combination. The connector provides vibration isolation between the coil and the spark plug, to thereby allow omitting the conventional connection of the coil to the engine via a bolt through a bolt hole on the coil case.