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Its function is to provide additional energy, in the form of heat, to facilitate the cold start of diesel engines. And after starting, it continues to supply energy to stabilize the engine's operation, preventing failures and reducing emissions levels.
Metal glow plugs:
They are based on the concept of metallic filament, which can be simple or bimetallic, their application depends on the engine's cold start system.
Ceramic glow plugs:
They are an evolution of glow plugs, where the heating element is produced in ceramic and allow to reach higher temperatures and in less time. In addition to this feature, they have a longer lifespan.