The power stroke extracts work from these gases as they expand and force the piston to BDC. In the exhaust stroke, the exhaust valve is open and the combustion products are expelled from the cylinder.

Combustion engines are classified initially based on how they combust fuel (either internally or externally). Within each category, there are a number of different types of designs. Two stroke engines ...

most cars nowadays use 4-stroke engines, including all Porsche engines. These strokes are effectively movements of the pistons inside the engine within one combustion cycle: intake, compression ...

The sounds. The smells. The feels that electrify the senses and carry you back to simpler times. For many motorcycle enthusiasts, working and riding on two-stroke bikes capture the essence of a ...