Seems to me that most free piston engines operate as 2-cycle, so they don't have any moving valves, just ports that are exposed or closed by the moving piston. However, I suspect you could improve efficiency by using moveable valves
In the past I've thought about trying to build a closed loop, solar(CSP) powered freepiston generator. Perhaps using water or something with a lower boiling point. However, PV got cheap so quickly that I lost interest in the idea. My PGP public key: https://vanderwal.us/evdl_pgp.key April 2, 2021 11:00 AM, "Robert Bruninga via EV" <[email protected]> wrote: > I guess I had seen this before, but I dont see why it cannot be really > built efficientloy and haved a great market in the EV range extending > application: > > Could free-piston range extenders broaden the electric-truck horizon? > (greencarreports.com) > <https://www.greencarreports.com/news/1131725_could-free-piston-range-extenders-broaden-the-electric > truck-horizon> > > a free piston flying back and forth with a magnet inside coils sure makes > for a one-moving-part gasoline generator (well plus valves)... And > could be made very modular with the only interfaces a gas-fill line, the > electric connections and an exhaust port. Drop it in and go. > > Bob > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20210402/8240573f/attachment.html> > _______________________________________________ > Address messages to [email protected] > No other addresses in TO and CC fields > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
