How does the engine work in a car?

A car engine works through a process known as the internal combustion engine, where fuel and air are mixed, compressed, and ignited within the engine’s cylinders. This process converts chemical energy from the fuel into mechanical energy that propels the vehicle.

A car is heavy. Also, a car needs to run with people and heavy luggage. For this reason, a car needs a large force. The engine creates the force (power) for that. Also, cars must run on various roads, such as slopes and highways. Therefore, a driver needs to be able to control the force generated by the engine freely.