It's been a long time since the automotive world has bothered with the mixing of oil and gas of the two-stroke combustion cycle — but soon, it may come time to rid ourselves of four-stroke engines, if a set of patent filings from Porsche for a six-stroke engine are a hint of what's to come.

Basically, this thing is a mashup of four-stroke and a two-stroke engine designs (here's how an engine works, by the way), that results in two power strokes in three revolutions.

The AutoGuide research department strikes again— this time discovering a wild new engine concept from Porsche that could bring huge gains in both efficiency and power density.Porsche has filed a paten

The patented engine design features a special crankshaft that adds more power and compression strokes to the cycle.