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How do cars work?

The four-stroke internal combustion engine is usually the machine that powers cars, trucks, generators.

It has four strokes:

  1. On the first (downward) stroke of the piston, fuel/air is drawn into the cylinder.
  2. The following (upward) stroke compresses the fuel-air mixture, which is then ignited by a spark.
  3. The ignited fuel-air mixture burns to create expanding exhaust gases, which force the piston downward for the third stroke.
  4. The final (upward) stroke evacuates the spent exhaust gasses from the cylinder.
I want to design a car of the future