A small R&D company, nemes-invent srl, patented and try to find developers and investors for his special hydro-pneumatic driven powertrain.The technology is very simple but very efficent too : some hydro-pneumatic accumulators around the IC engine have fitted some heat-exchangers in the gas area. During the compression in one tank , the gas is simultaneous cooled by heat exchangers and the cold side of a heat pump achieving an isotherme ; the derived compression heat is pumped to heat the already compressed gas (in prior cycle) in the next tank.Further, the heated compressed gas is overheated in the next tank by an extra hot heater circulated by hot exhaust gas in order to expand and push the hydraulic liquid to the hydraulic powered wheels.The heat pump itself is driven by the cooling fluid of the IC engine,adding its own heat to the compression heat and push both heats back into the thermodynamic cycle to heat the compressed gas and improving the thermodynamic efficiency . The accumulators don't work just as passive buffers anymore but, act as genuine heat engines inside the thermodynamic cycle like Stirling engines somehow.The result is a hugh efficiency improvement , a drastic fuel consumtion sink and a sensitive reduction of CO2 emission. The technology is 10 times better as the hydro-lunch made by EPA and Eaton for UPS trucks.Nobody interested ? nemes.invent@gmail.com