Somebody, think this thru....
Something must create the steam. Use gas, and you have a less efficient total system that still polutes.
Diesel, same.
Use Propane to make the steam to run the car? Why not just use propane powered engines to reduce emissions, skip the steam step (which would deliver fewer advantages than than just burning propane in an I.C.E.). So just burn Propane in an engine - all the advantages, less chance of explosive scalding.
Oh. Wait. That has been done already.
This is NGH technology - Never Gonna Happen
Something must create the steam. Use gas, and you have a less efficient total system that still polutes.
Diesel, same.
Use Propane to make the steam to run the car? Why not just use propane powered engines to reduce emissions, skip the steam step (which would deliver fewer advantages than than just burning propane in an I.C.E.). So just burn Propane in an engine - all the advantages, less chance of explosive scalding.
Oh. Wait. That has been done already.
This is NGH technology - Never Gonna Happen