Years ago, I was sitting looking at a V-8 block in the shed trying to work out if I could do an "internal combustion stirling" arrangement...drew some stuff up, ran some numbers, and it stayed in my head, but entirely not practical.
Found this yesterday
http://www.greencarcongress.com/2016/06/20160623-ricardo.html
It's a lot like the pictures I did, but vastly different in actuality.
Sort of combines a bunch of cycles (they say Erickson and diesel, but I think a bit of brayton there too).
V-configuration, although that's not as important as it was with stirling concept, a couple (two) of full time compression cyclinders, and 6 expanders. A heat exchanger to transfer heat from exhaust into the fresh air charge, then diesel added to the expanders...expansion ratio much greater than compression which is good for thermodynamics.
Technically a two stroke, but separating the functions.
Reminiscent really of the Ricardo Dolphin in some ways too...
http://www-g.eng.cam.ac.uk/millennium/achievements/ricardo/index.htm
Found this yesterday
http://www.greencarcongress.com/2016/06/20160623-ricardo.html
It's a lot like the pictures I did, but vastly different in actuality.
Sort of combines a bunch of cycles (they say Erickson and diesel, but I think a bit of brayton there too).
V-configuration, although that's not as important as it was with stirling concept, a couple (two) of full time compression cyclinders, and 6 expanders. A heat exchanger to transfer heat from exhaust into the fresh air charge, then diesel added to the expanders...expansion ratio much greater than compression which is good for thermodynamics.
Technically a two stroke, but separating the functions.
Reminiscent really of the Ricardo Dolphin in some ways too...
http://www-g.eng.cam.ac.uk/millennium/achievements/ricardo/index.htm