The motorcycle engine has come a long way from its auspicious 19th-century beginnings, evolving over the years to include ...

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.

Engines are a fundamental part of Porsche's identity, and their latest patent is a testament to this fact. Let's delve into ...

The German automaker sees your four-stroke engine and raises you... two more strokes. Ready for some math? Porsche just ...

Early in the history of motorcycling, everything was four-stroke. Four-stroke engines crashed the party in the late '90s, rose to prominence in the mid-2000s and have remained in professional ...

Along with a TIG welder and mechanical ingenuity bordering on genius-level, all of which come to bear on this fridge compressor to four-stroke engine build. The video posted by [Let’s Learn ...

A patent for a six-stroke engine would normally go directly into our crackpot-engine file, but when the patent filer is Porsche, we feel obligated to examine it further. Unlike a four-stroke ...

Ilmor says the next step is to build another working prototype with targets of 10% better fuel efficiency and 20% less engine weight compared to an equivalent four-stroke engine.

Porsche has patented a revolutionary six-stroke internal combustion system. Contrast to all modern combustion engines that run the four-stroke Otto cycle that typically features one compression ...