Explain thermodynamics in how a car runs?

The Otto Cycle can be used to describe how an internal combustion engine works, which allows your car to run by just filling it up with gas. Each of the numbers shown in the figure (1 through 6) represent one stage of the Otto cycle, or one step of the internal combustion process. The common automobile engine is called a "4 Stroke Engine" because it has 4 strokes, which are the Intake Stroke, Exhaust Stroke, Compression Stroke, and Power Stroke. The "Combustion Process" shown in the Otto Cycle in the figure occurs between Strokes 3 and 4, and the "Heat Rejection" shown in the figurea occurs between Strokes 3 and 4.