When the pistons reach their respective bottoms, fresh air flows in from ports at the bottom, while exhaust is rejected through ports at the top. That fresh air is squeezed into a small pocket in the ...

Engineers have a lot to think about when designing new engines, and one of the biggest considerations is the shape of the ...

In a conventional application, there are three rings per piston. The top ring is called the compression ring. Its purpose is to seal the combustion gas pressure, transfer heat from the piston to the ...

Add Yahoo as a preferred source to see more of our stories on Google. There's more to piston shapes than you might think. Whether it's domed, flat, or dished, all pistons have their fair share of pros ...