70% of energy is wasted in any Internal combustion engine. Piston or Wankel. 50% in Jet engines.
There is huge family of engines, not known for most people/engineers. Which promises much higher thermal and mechanical efficiency.
This Family of engines I calle Circular Engines, they promises to give 100% mechanical efficiency.
Bringing up over all thermal efficiency of Internal Combustion Engines to an estimated 60% to 90%.
They have no connecting Arm or rod between piston and crank . The piston runs in a perfectly circular path / chamber.
Converting the pressure generated by the burnt gases directly into Circular torque ,orbital torque, toroidal torque.
Putting or mounting the Piston directly on the Axial power shaft , so that they act directly on it (i.e. main
power shaft) there will be no mechanical convertion loss , since the torque arm if set to full , or complete steady value, unlike Wankel and Piston which have changing Effective Legth of Torque Arm (ELTA),while the circular engines ELTA is continually complete.
Search words
Toroidal Torque , toroidal engine, Circular engine, Circular Torque , Piston-less Engine , Cam less Engine