a spark plug

a spark plug

  (American informal)
a person with a lot of energy and ideas who encourages the other people in a group The school's new principal is the spark plug in a team that includes parents, teachers and community.
See also: plug, spark
References in periodicals archive ?
16, 2015 /PRNewswire/ -- About Spark Plug A spark plug is an integral component in an engine, and it performs an important function of producing sparks that are necessary to ignite the mixture of air and fuel in the engine.
They may want a spark plug with a hotter spark, or one that sits farther down in the combustion chamber to produce the precise shape, size and duration of flame they're looking for in there.
In effect, it looks somewhat like a Tesla coil-and interestingly enough, Nikola Tesla held a patent for a spark plug.
In other words, they've developed the ACIS so that there are two parts, the igniter which resembles a spark plug and an inductor that is basically like an ignition coil.
When the spark generated by a spark plug grows during combustion with the air-fuel mixture, it loses heat when it comes into contact with electrodes and ignition performance decreases.
Although the useful life of a spark plug has been extended, its basic function has not significantly changed since the early 1900s.
A spark plug (in case of gasoline engines) or a glow plug (for diesel engines) a vital component that is essential for the functioning of a vehicle engine.
Included in this assignment was also a spark plug invention that has become another important part of ESWW.
The GDI engine is a spark ignited, direct fuel injected engine requiring a completely new engine design, incorporating both a spark plug and injector for each cylinder.
Increased gap on a spark plug causes higher voltage requirements," said Kashnowski.
It follows the Champion Stainless Steel spark plug, which resists rust and corrosion even in saltwater; Champion EZ Start, a spark plug designed to provide easier starting for lawn mowers, chain saws, trimmers and other small engines; and, Truck Plug, which has a projected core nose that improves performance in trucks, recreational vehicles and other heavy-duty applications.
NYSE: ALD) has completed the acquisition of a spark plug plant in Treforest, South Wales (United Kingdom), from Ford Motor Co.