HOW A CAR ENGINE WORKS
If your only experience with a car engine’s inner workings is “how much is that going to cost to fix?” this graphic is for you. Car engines are astoundingly awesome mechanical wonders. It’s time you learned more about the magic under the hood: The 4 Stroke Combustion Cycle. Let’s take a look inside the cylinder, also known as the combustion chamber (that’s where all the power is generated).
The piston descends, sucking air into the cylinder through open intake valves as fuel
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.