what is two stroke engine and Four stroke engine?

To know what is the difference between two stroke engine and four stroke engine, we have to know about 2 stroke engine and 4 stroke engine. So further we know what is 2 stroke and 4 stroke engine. 


what is two stroke engine?

2 stroke engines are those engines in which once the fuel blast occurs, the piston moves once downward and once upward, and a complete revolution of the crank soft is 360 degrees. That engine is called a two stroke engine. 

One stroke engine 

Fuel blast occurs only once in this engine. After which one turn down of the piston is called a stock. And one turn up is called two stocks. Which you can see in the picture given below. This engine is used in light vehicles like motorcycles, autos etc. 




In this picture, you can clearly see that after one turn of fuel blast, the piston is going down one turn and one turn upwards. During this, one cycle of Crank Soft is also being completed. So this is how a 2 stock engine works? 


what is four stroke engine?

In a four stroke engine, once the fuel blast occurs, the piston moves two times down and two times up. Because of which it takes two rounds of crank soft. This engine is used in heavy vehicles like trucks, buses and airplanes etc. As you can see in the picture given below. 



In this picture, you can clearly see that once there is a fuel blast inside the engine, the piston is moving two turns down and two turns up, and during this two revolutions of the crank soft are being completed. This is how a 4 stock engine works. 
 

Some point of 2 stroke engine and 4 stroke engine 

Mechanical parts are different in both these engines, and both these engines have been designed differently. For example, the timing of fuel insert, the timing of exhaust exit, and the timing of valve open and close are also different. In a 2 stroke engine, fuel is inserted after the piston has made one upstroke and one down stroke. 

Similarly, in a 4 stock engine, fuel is inserted after the piston moves down twice and up twice. Their valves keep on closing and opening according to the time of fuel consumption. 

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