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			Four -stroke engine: Simple explanation
The 4 -stroke engine is an internal combustion motor type that uses a four -stage cycle to generate power. Next, the operation of a 4 -stroke engine is described:
The 4 stages of the 4 -stroke cycle
1. *Admission *: At this stage, the piston moves down, creating a vacuum in the cylinder. The intake valve opens, allowing the air and fuel mixture to enter the cylinder.
2. *Compression *: At this stage, the intake valve closes, and the piston moves up, compressing the air and fuel mixture in the cylinder.
3. *Explosion *: At this stage, the spark plug lights the air and fuel mixture, causing an explosion that pushes the piston down.
4. *Escape *: At this stage, the exhaust valve opens, allowing combustion gases to leave the cylinder.
4 -stroke advantages
1. *Efficiency *: 4 -stroke engines are more efficient than 2 -stroke engines, since they use a more complete cycle to generate power.
2. *Lower fuel consumption *: Due to their greater efficiency, 4 -stroke engines consume less fuel than 2 -stroke engines.
3. *Less gas emission *: 4 -stroke engines emit less polluting gases than 2 -stroke engines.
4 -stroke disadvantages
1. *greater complexity *: 4 -stroke engines are more complex than 2 -stroke engines, which can increase their cost and hinder maintenance.
2. *greater weight *: 4 -stroke engines are usually heavier than 2 -stroke engines, which can affect their performance and efficiency.
4 -stroke applications
1. *vehicles *: 4 -stroke engines are commonly used in vehicles, such as cars and trucks.
2. *Machinery *: 4 -stroke engines are used in machinery, such as tractors and excavators.
3. *Generators *: 4 -stroke engines are used in generators, which provide electricity in emergency situations or in remote areas.
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