Petrol Engine

 Today I am going to tell you guys about petrol engine it is a internal combustion engine and the combustion take place by igniting petrol by spark plug. One interesting this I would like to add here that petrol is a hydrocarbon and have eight carbons and 18 hydrogen. It has low density and low volatile hydrocarbon.

Petrol engine of a car is light weight as compared to diesel engine due to low compression ratio of petrol as due to low volatility petrol get burn by giving ignition by shark plug.

In ideal condition a 14.5:1 air to fuel ratio required for getting an optimal output from a petrol engine.

Petrol engine has more rpm for a same distance than a diesel engine so that is why it wear tear fast and lead a low life in comparison of diesel engine of same capacity.

In a cylinder piston move from top to bottom to take a suction of air and petrol mixture. Then this mixture start getting compressed as crank piston mechanism is design in this way to compress the mixture. When piston move upward in a cylinder mixture get compressed and shark plug shots a electrical spark.

By this in a cylinder blast if petrol take place and heat and energy released by mixture that thrust piston down ward with energy.

This fuel engergy produced in cylinder taken out by engine on it output shaft.

After reaching bottom set point piston start moving upward and displace burn hydrocarbon out from cylinder through exhaust valve.

Now engine is ready to suction a next air fuel mixture and this cycle keeps going.


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