What is the working process of automobile engine? Are there any general features?

Hello: A four-stroke gasoline engine mixes air and gasoline in a certain proportion into a good mixture, which is sucked into the cylinder during the intake stroke. The mixture is compressed, ignited and burned to generate heat energy. High temperature and high pressure gas acts on the top of the piston, pushing the piston to do linear reciprocating motion, and outputting mechanical energy through connecting rod and crankshaft flywheel mechanism. A four-stroke gasoline engine completes a working cycle in the intake stroke, compression stroke, power stroke and exhaust stroke.