Ignition apparatus having a spring for electrically connecting a spark plug
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsChristian Mayer, Peter Pawlik
Life of this patent
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Abstract
An ignition apparatus for an internal combustion engine includes a spark plug, an ignition coil with a voltage connection, and a spring for electrically connecting the spark plug to the voltage connection. A continuous spring wire in the form of external turns extends from an ignition coil-side end of the spring to a spark plug-side end of the spring. The spring wire at the spark plug-side end continues in the form of internal turns within the external turns in a direction toward the ignition coil-side end.
Claims10
An ignition apparatus for an internal combustion engine, comprising:
- a spark plug;
- an ignition coil with a voltage connection;
- and
- a spring for electrically connecting the spark plug to the voltage connection, wherein
- a continuous spring wire of the spring in the form of external turns extends from an ignition coil-side end of the spring to a spark plug-side end of the spring,
- the continuous spring wire at the spark plug-side end continues in the form of internal turns within the external turns in a direction toward the ignition coil-side end, and
- the internal turns at the spark plug-side end taper along a longitudinal axis of the spring in a direction away from the spark plug-side end such that the internal turns have a larger diameter at the spark-plug side end than at the ignition coil-side end.
A spring for electrically connecting a spark plug to a voltage connection in an ignition apparatus, comprising:
- a continuous spring wire formed with external turns configured to extend from an ignition coil-side end of the spring to a spark plug-side end of the spring, wherein
- the continuous spring wire continues at the spark plug-side end of the spring forming internal turns within the external turns, the internal turns extending in a direction away from the spark plug-side end toward the ignition coil-side end and being configured to receive an electrical contact point of the spark plug, wherein the internal turns at the spark plug-side end taper along a longitudinal axis of the spring in a direction away from the spark plug-side end such that the internal turns have a larger diameter at the spark-plug side end than at the ignition coil-side end.
Dependencies are inferred from the claim text.