Quote:
Originally Posted by XR6 Martin
Piston rings are not only there to provide a seal, but they also scrape the oil back down the cylinder walls.
But their design is frictionless, and thus not oil is required in the cylinders; so somehow they are going to have to seal the cylinders to stop oil getting in there.
Not only that, im not sure what their solution is to stop the cylinder walls from being sooted/carboned up over time.
But sounds like a decent leap forward if they can get it to work in the real World.
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I agree with what you say but am not sure about the assumption in the article about the design being frictionless. I could be wrong, but doesn't the cylinder "lean" on one side of the combustion chamber wall as the piston rises and then lean on the opposite side as the cylinder falls? Taking out the piston ring doesn't stop the cylinders leaning. Or am I missing something?