The glow plug mainly consists of a housing in which a heating pin is pressed in. In the heating pin there are the heating spiral and the sensor spiral, both are connected in series and embedded in a ceramic mass.
Prior to engine starting : To make quickly available a hot surface of approximately 850℃(1562℉), where the air-fuel mixture evaporizes and ignites during the compression stroke.
While engine starting : To support the engine run-up.
After engine starting : To improve the idle running and to reduce the emissions of blue smoke, pollutants and noise.
