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Title: Industrial Spark Plug Realities
Author: A. R. Brenholts, Jr.
Source: American Gas Association 1984
Year Published: 1984
Abstract: The spark plug is not as mysterious a device as some think it to be. Simply put, the spark plug is essentially a high-voltage electrical pass-through providing a spark gap with a controlled rate of thermal transfer. In relation to other power cylinder components, the spark plug is a passive participant in the combustion events. Though it may be involved in the initiation of combustion, its role is similar to that performed by the diving-board for an Olympic diver. In the spark plugs world, the diver is the nugget of electrical energy developed by the other, upstream, ignition components. Spark plugs are mere transmitters for the electrical star. Industrial spark plugs attempt to be as close to no-compromise design as possible with zero defect, quality-conscious manufacturing perfecting in them the capability to provide the longest operating intervals (measured in hours) of any spark plugs ever made. Furthermore, they are intended to be retired from service principally from the norinal wearing action of the electrical discharges eroding the spark gap surface area to a dimension beyond the energy-producing/delivering capabilities of the upstream ignition components.

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