System for protecting a turbo-supercharging unit (T, C), in particular for preventing a respective damage when a pressure of a respective lubrication oil is insufficient, comprising first exhaust gas bypass means (OV, GB), wherein said first exhaust gas bypass means comprise a minimum pressure valve controlled as a function of a pressure of the lubricating oil of the turbo-supercharging unit (T, C), in order to allow to at least a part of said exhaust gas to bypass the turbine when said pressure is below a first predetermined threshold, wherein the system further comprises second bypass means of exhaust gas, controlled as a function of a pressure of fresh air measured at a respective intake manifold and wherein said second bypass means comprise a waste gate valve, wherein said waste gate valve and said minimum pressure valve are integrated in a single body defining a double driving inlet valve, said double driving inlet valve comprising - an external case, - a first inlet intended to be operatively connected with an intake manifold of an internal combustion engine, - a first expansible chamber, wherein said first inlet opens, made between the external case and a first movable part, - a first spring, placed between the first movable part and a first fixed point within the external case, opposing to an expansion of the first chamber, - a second inlet, intended to be operatively connected with the lubricating oil circuit of the turbo-supercharging unit, the system being characterized in comprising - a second expansible chamber, wherein said second inlet opens, made between the internal case and a second movable part, - a second spring, placed between the second movable part and a second fixed point within the external case, opposing to an expansion of the second chamber, - a single shaft, movable between a retracted and an extended position, connected with said movable parts (D1, D2) to control the bypass of the turbine wherein said first and second fixed points (SF1, SF2) and the first and second movable parts (D1, D2) are reciprocally arranged so that the said movable parts (D1, D2) move in a reciprocal opposite way, the one with respect to the other, when respective thresholds of the pressure generated in the respective first and second chambers (R1, R2) are reached. - an external case, - a first inlet intended to be operatively connected with an intake manifold of an internal combustion engine, - a first expansible chamber, wherein said first inlet opens, made between the external case and a first movable part, - a first spring, placed between the first movable part and a first fixed point within the external case, opposing to an expansion of the first chamber, - a second inlet, intended to be operatively connected with the lubricating oil circuit of the turbo-supercharging unit, - a second expansible chamber, wherein said second inlet opens, made between the internal case and a second movable part, - a second spring, placed between the second movable part and a second fixed point within the external case, opposing to an expansion of the second chamber, - a single shaft, movable between a retracted and an extended position, connected with said movable parts (D1, D2) to control the bypass of the turbine wherein said first and second fixed points (SF1, SF2) and the first and second movable parts (D1, D2) are reciprocally arranged so that the said movable parts (D1, D2) move in a reciprocal opposite way, the one with respect to the other, when respective thresholds of the pressure generated in the respective first and second chambers (R1, R2) are reached.