Fuel is combusted in the stroke of a four-stroke engine?

Here's a breakdown of the four strokes:

1. Intake Stroke: The piston moves down, creating a vacuum that draws in an air-fuel mixture.

2. Compression Stroke: The piston moves up, compressing the air-fuel mixture.

3. Power Stroke: This is where the fuel ignites (combustion). The expanding gases from the combustion push the piston down, generating power.

4. Exhaust Stroke: The piston moves up again, pushing the exhaust gases out of the cylinder.

Let me know if you have any more questions!