The invention relates to an ambient temperature
thermal energy cryogenic engine with
constant pressure with continuous ''cold''
combustion at
constant pressure and with an active chamber operating with a cryogenic fluid (A2) stored in its
liquid phase, and used as a work gas in its gaseous phase and operating in a closed cycle with return to its
liquid phase. The initially liquid cryogenic fluid is vaporized in the gaseous phase at very low temperatures and supplies the inlet (A4) of a gas
compression device (B), which then discharges this compressed work gas, still at low temperature, and through a
heat exchanger with the ambient temperature (C), into a work tank or external
expansion chamber (19) fitted or not fitted with a heating device, where its temperature and its volume will considerably increase in order to then be preferably let into a relief device (D) providing work and for example comprising an active chamber according to international
patent application WO 2005 / 049968. Application to land vehicles, motor vehicles, buses, motorcycles, boats, aircraft, standby generators,
cogeneration sets, stationary engines.