Word forms: (regular plural) glow plugs
( Automotive engineering : Vehicle components , Engine, transmission, and exhaust ) plug1, plug2
A glow plug
is an electrically heated plug that is fitted to the cylinder head of a diesel engine
to make it easier
to start the engine in cold conditions.
The miniature motor doesn't need an ignition system, just a glow plug to get it started.
The glow plug circuit is used on the diesel engine to initially start the engine.
Each cylinder has a small glow plug that begins heating the air in the pre-combustion chamber.
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