SPARK PLUG WORKING, TYPES, CLEANING THE SPARK PLUG AND FAILURE. WORKING: The function of the spark plug is to produce an electric spark to ignite the compressed air fuel mixture inside the cylinder. It must produce the spark at the correct movement at the end of the compression stroke. A proper gap is to be maintained between the two electrode of the spark plug so that the sparking may take place. When the spark plug is screwed in the cylinder head, the ground electrode is said to be connected with ground. The terminal of the centre electrode is directly connected with H.T leads of the ignition coil in case of single cylinder engine, or through the distributor in case of multi cylinder engine. The secondary circuit ot the electrical system to be completed through the gap between the electrodes. When the H.T. current passes through the circuit, it jumps the gap producing a , spark, which ignites the compressed air fuel mixture in the cylinder. Spark plug with a r...
Automobile basic & advanced knowledge