VW Käfer Kolbenladermotor piston charger six stroke engine

[Myrtone]

Did the same ideo ever occur to Nicholaus Otto himself, it would surely have been technically possible in his time.

[StructureITA]

This is a quite odd arrangement, but anyhow it seems to behave like a conventional monocylinder two strokes engine with an external induction chamber. Six strokes engines should work in a quite different way