Has anybody heard of this? I've read the website of its inventors, but its
translated from French into English and things are a little confusing. He
claims he has a working version of this engine. Does anyone know more about
it? i.e. efficiency, fuel economy, is it a hoax, etc.
Well, with the reference they give, it appears to be some serious work, even
if the website material lacks of precise figures and diagrams.
Anyway, we made some calculations last year at school (Mechanical master
degree) and the efficiency claimled seems to me reallistic: a photonic
combustion engine would be twice more efficient than a classical internal
combustion engine. At the moment, motor manufacturers (the french ones at
least i can tell you :o) are trying to obtain a "photonic combustion" in a
classical internal combustion engine. As far as I know, the main issue isn't
the combustion control, but to meet the reliability and endurence
requierments with higher temps and pressure in the combustion chamber.
The combustion cycle isn't that revolutionary... For me the engine design is
a little bit more. But I would be really curious to know they achieve the
combustion chamber sealing (is that the word?) properly. I thought it was a
major issue for rotating engines... And one have to tell theses guys that
even with a fixed center of mass, the engine might still vibrate.
Ps Why don't try to retrive more info by emailing the website authors?
I could get by for now without precise or
labled diagrams. Just some curves on an
axis would suffice so I could get an
idea if the compression was adiabatic or
isothermal or if the addition of heat
isobaric or instant, etc.
T-S and P-V diagrams would also help
explain the machinery.
It may be a great invention, but without a
T-S or P-V diagram, there's no quick way
to demonstrate to others that an engine
could have higher efficiency.
All conservatism is based on censorship of
-- Bret Cahill
IIRC this has been discussed at length over the years on
Again, IIRC, it was poo-pooed by the boffins there.
If it compresses fuel and air, it is limited to the chemical antiknock
properties of the fuel, I would have thought, and thus would have a
significant disadvantage over a CI engine.
BTW, that 50% more power/efficiency without a throttle, is a furphy in
I haven't read the site carefully though yet :)
I'll wait till someone with more patience than me finds something
interesting there :)