Miller cycle (IIRC) was a bit different. It simply kept the intake valves open longer and used boost from it's supercharger to emulate a valve "closing". It

Miller cycle (IIRC) was a bit different. It simply kept the intake valves open longer and used boost from it's supercharger to emulate a valve "closing". It used a boost level that was significantly higher than a supercharged Otto cycle would use. Volkswagen is doing something similar with the EA888.3B (B cycle) motor that is in the most recent Tiguans. https://www.motortrend.com/features/inside-volkswagen-ea888-b-cycle-2-0-tsi-i4/ https://www.motortrend.com/features/inside-volkswagen-ea888-... This six stroke is doing something a bit more complex...more impressive, IMHO. Similar in complexity to what Nissan is doing with their variable compression engine they are currently using https://www.nissan-global.com/EN/INNOVATION/TECHNOLOGY/ARCHIVE/VC_TURBO_ENGINE/ https://www.nissan-global.com/EN/INNOVATION/TECHNOLOGY/ARCHI... There was also a 6 stroke diesel a while back that injected water into the empty cylinder after the exhaust stroke to gain an extra compression stroke from waste heat...Bruce Crower (Crower Cams fame) built one years ago but I never heard anything more about it. https://www.autoweek.com/news/a2063201/inside-bruce-crowers-six-stroke-engine/ https://www.autoweek.com/news/a2063201/inside-bruce-crowers-...