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Spark Plugs are known as the electrical device which gets fit into the cylinder head of the internal combustion engine and ignites compressed aerosl gasoline with the help of an electric spark. Earlier spark patents included those by Nikola Tesla, Richard Simms and Robert Bosch. Some historians have made a remark that the early spark plug was invented by the Edmond Berger on February 02, 1839. Karl Benz is also credited with the invention. But only the invention of the first commercially viable high-voltage spark plug as part of a magneto-based ignition system by Robert Bosch's engineer Gottlob Honold in 1902 made possible the development of the internal combustion engine.
Operation :By the ignition coil or magneto, spark plug is connected at the high voltage. Due to the flowing of the electrons from the coil, a voltage difference gets developed between the center electrodes and side electrodes. No current can flow because the fuel and air in the gap is an insulator, but as the voltage rises further, it begins to change the structure of the gases between the electrodes. Once the voltage exceeds the dielectric strength of the gases, the gases become ionized. The ionized gas becomes a conductor and allow electrons to flow across the gap. Generally spark plugs need voltage in excess of 20,000 volts to fire properly. When the current of electrons surge across the gap, it increases the spark channel to 60,000k
Parts of the Spark Plug :
- Terminal
- Insulator
- Ribs
- Insulator Tip
- Seals
- Metal Case
- Center Electrodes
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