33 Automobile knowledge Skip to main content

Posts

Showing posts from August, 2021

SPARK PLUG WORKING AND TYPES

SPARK PLUG WORKING AND TYPES

  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...

SPARK PLUG Construction and Materials

  SPARK PLUG Spark plug is a device to produce electric spark to ignite the compressed air fuel mixture inside the cylinder. The spark plug screwed in the top of the cylinder so that it’s the electrode projects in the combustion chamber. Construction : A spark plug consist of three parts 1.       Centre electrode or insulated electrode. 2.       Ground electrode or outer electrode. 3.       Insulation separating the two electrodes. The upper end of the centre electrode is connected to the spark plug terminal, where H.T cabel from the ignition coil is connected. It is surrounded by porcelain insulator. The lower half portion of the insulator is fastened with a metal shell. The lower portion of the shell has a short electrode attached to one side   and bent in towards the centre electrode, so that there is a gap between two electrode. The two electrode are separated by the insulator. The sea...