arpadveress 
The car goes from the fact that the petrol has a series of tiny explosions in it. That’s why gasoline engines are even called explosive engines. The buzzing sound the car is actually the sound of a series of explosions. The car is powered by energy released from gasoline.
Gasoline, if ignited and works well. It only explodes if it ignites in a closed container mixed with air; but most fiercely when the pressure in this mixture is high. In the car, gasoline is sprayed into the cylinder, where it is sucked in by the piston when it goes back, and squeezed when it runs forward. And when the petrol-air mixture is well compressed at the end of the cylinder, at the piston head, the electric spark of the car spark flashes in the Otto engines. In diesel engines, they are compressed until they heat up so that they explode on their own. Explosion. The force of this pushes the piston back to the other end of the cylinder as it pushes the gas residue from the burnt-gasoline mixture into the exhaust pipe and draws in the new dose. Then it all starts all over again. The reciprocating motion of the piston is converted into a rotating motion by the crankshaft and the crankshaft. That’s why gasoline explosions cause the wheels to spin.
This is why all automobiles powered by Otto engines are exceptions in terms of explosion protection. They are not built Ex proof, and this is acceptable.
If not this way, all automobiles would look like T5. 1/3 engine in a “flameproof housing” and 2/3 is the cabin to protect passengers from any effect of explosions coming from room next to them.
Keep up good work!
Arpad
