[drmiller100]

Originally Posted by IamIan

Have you seen the work being done at LiquidPiston?

interesting engine.

with ceramics, it seems like a fellow could make a combustion chamber which was fairly well insulated. then use a poppet valve to push the pressurized gas in.

I'm a little puzzled how they are going to "overexpand" down to atmospheric pressures, unless they leave the exhaust valve open on the compression stroke?

For that matter, they could run this thing as a 2 stroke with a separate combustion chamber.