How Car Engines Work
- The piston descends,sucking air into the cylinder through open intake valves fuel is injected.
- With all valves closed, the piston comes back up,compressing the fuel-air mixture. Compressing the mixture delivers better power and efficiency.
- A spark ignites the compressed fuel-air mixture, and the resulting combustion forces the piston to the bottom of the cylinder again.
- The piston comes back up, pushing the spent mixture out through open exhaust valves.
That is How A Car Engine Works