How does combustion occur in gas engine of a car?

Answer 1

Combustion in a gas engine of a car occurs through a series of steps in the engine's cylinders. Here's how it happens:

1. Air and fuel mixture: In a gas engine, air and fuel are mixed together in the combustion chamber. The fuel is injected into the chamber either directly (in direct injection engines) or into the intake manifold where it mixes with the air (in port fuel injection engines).

2. Compression: The piston inside the cylinder moves upward, compressing the air-fuel mixture. This compression increases the temperature and pressure of the mixture.

3. Ignition: A spark plug then ignites the compressed air-fuel mixture. The spark causes combustion, turning the mixture into a rapidly expanding hot gas.

4. Power stroke: The rapid expansion of the hot gas pushes the piston down in the cylinder, creating mechanical energy. This is the power stroke, also known as the combustion stroke.

5. Exhaust: After the power stroke is completed, the exhaust valve opens and the exhaust gases are expelled from the cylinder. This process is repeated in each cylinder in the engine to produce the power needed to drive the car.

Overall, combustion in a gas engine is a controlled process that converts the chemical energy in the fuel into mechanical energy that powers the car's movement.