1. Intake Stroke:
- The engine's piston moves downward, creating a low-pressure area in the cylinder.
- A mixture of air and fuel is drawn into the cylinder through the intake valve.
2. Compression Stroke:
- The piston moves upward, compressing the air-fuel mixture, which increases its pressure and temperature.
3. Ignition:
- At the top of the compression stroke, the spark plug generates a high-voltage spark, igniting the compressed air-fuel mixture, initiating combustion.
4. Power Stroke:
- The combustion of the air-fuel mixture causes a rapid expansion of gases, generating high pressure and temperature.
- This pressure forces the piston downward, providing power to the crankshaft.
5. Exhaust Stroke:
- As the piston reaches the bottom of the power stroke, the exhaust valve opens.
- The high-pressure exhaust gases are expelled from the cylinder through the exhaust valve.
6. Exhaust Gas Treatment:
- The exhaust gases pass through a catalytic converter and other emission control devices to reduce harmful pollutants before being released into the atmosphere.
7. Repeat:
- The engine continuously repeats these four strokes (intake, compression, power, and exhaust) in a continuous cycle to generate power and propel the vehicle forward.
The burning of fuel in a car engine is a controlled process that involves precise timing of fuel injection, ignition timing, and valve opening and closing to ensure optimal efficiency and performance. Advanced engine management systems and fuel injection technologies help optimize these processes, reducing emissions and improving fuel economy while maximizing power output.
