4-stroke Engine (ICE) explained: How it works

4-stroke Engine (ICE) explained: How it works #engine #engines #automobile #automotive #FourStrokeEngine#internalcombustionengine #4StrokePower
#enginetechnology#FourStrokePerformance#mechanicalengineering#automechanics #EngineInnovation#AutomotiveTech #PowerAndEfficiency @Er_Simmu1014

A four-stroke internal combustion engine is a type of engine commonly used in cars, motorcycles, and other machinery. It operates by completing a full cycle of four distinct strokes (or phases) for each combustion process. The four strokes are:

1. Intake Stroke:
Objective: Introduce the air-fuel mixture into the cylinder.
Process:
The intake valve opens.
The piston moves down, creating a vacuum inside the cylinder.
The air-fuel mixture (for gasoline engines) or just air (for diesel engines) is drawn into the combustion chamber.
The intake valve closes at the end of this stroke.
2. Compression Stroke:
Objective: Compress the air-fuel mixture for efficient combustion.
Process:
Both intake and exhaust valves remain closed.
The piston moves upward, compressing the air-fuel mixture in the closed chamber.
Compression increases the pressure and temperature of the mixture, making it easier to ignite.
3. Power (Combustion) Stroke:
Objective: Generate power through combustion.
Process:
With the air-fuel mixture fully compressed, a spark plug (in gasoline engines) or the heat of compression (in diesel engines) ignites the mixture.
The combustion of the air-fuel mixture produces high-pressure gases, forcing the piston down.
This downward movement turns the crankshaft, producing mechanical energy that powers the engine.
4. Exhaust Stroke:
Objective: Expel burnt gases from the cylinder.
Process:
The exhaust valve opens.
The piston moves upward again, pushing the burned gases out through the exhaust valve.
After the exhaust gases are expelled, the exhaust valve closes, and the cycle repeats.
Key Components:
Piston: Moves up and down inside the cylinder.
Cylinder: The chamber where combustion takes place.
Valves: Control the flow of air-fuel mixture (intake) and exhaust gases (exhaust).
Crankshaft: Converts the piston's up-and-down motion into rotational motion, driving the vehicle.
Spark Plug: Provides the spark needed to ignite the air-fuel mixture in gasoline engines.
Advantages of a Four-Stroke Engine:
Efficiency: More efficient fuel consumption due to a complete combustion process.
Lower Emissions: Cleaner emissions compared to two-stroke engines, which burn oil in the combustion process.
Durability: Typically lasts longer than two-stroke engines because they are less stressed and have better lubrication.
This engine cycle repeats many times per second, producing continuous power to drive vehicles or machinery.