The patented engine design features a special crankshaft that adds more power and compression strokes to the cycle. ================================================================= Porsche has revealed a strange (and possibly brilliant) idea for a six-stroke combustion engine. If you don't know the fundamentals of an internal combustion engine, we'll try to keep this simple. If you do know how engines work ... we'll still try and keep it simple. With very few exceptions every combustion-powered car uses a four-stroke engine: intake, compression, power, and exhaust. The intake stroke is where air and fuel come into the cylinder. Compression is when the piston pushes that...