You've probably heard of two- and four-stroke engines, but what are the four strokes of a gasoline engine? And how do they ...

You may have heard your car has a four-stroke engine, but you're not sure what that means. Why are there four? And what is a stroke, anyway? A modern gas engine most commonly uses pistons and a ...

Ready for some math? Porsche just patented an engine design titled: "Method for a Combustion Machine With Two Times Three Strokes." Huh? As the opening paragraph of the patent (filed jointly with ...