Spark plug with automatically adjustable gap

Details Spark plug with automatically adjustable gap Spark plug with automatically adjustable gap

1995-01-10

1995-10-31

Yusko, Donald J.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313125, 313134, 313142, H01T 1326

Patent

active

054632676

ABSTRACT:
In spark ignited engine configurations, it is common to provide a spark plug that has a spark gap that has dimension that will accommodate good starting capabilities for the engine. In some cases, this spark gap is larger than required for the engine to run efficiently, especially at high loads. As a result, the voltage required to bridge the gap when the engine is running at high loads is much higher than necessary and causes erosion of the electrode and a build up of deposits on the ground strap. Ultimately, this greatly reduces the life of the spark plug. The present invention provides a spark plug that utilizes an adjusting means that is connected to the electrode of the spark plug and functions to move the electrode with respect to the ground strap to adjust the gap therebetween. The adjusting means is responsive to the temperature of the spark plug which will vary with engine loads or an increase in pressure within the combustion chamber.

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