NOVELTY - The charger (1) has a compressor (4) for compressing sucked combustion air, which is connected to air intake (2) of the internal combustion engine (3) via switchable mechanical coupling (6). The circulation system (9) is provided with expansion section (7) which is driven by waste heat of engine. The expansion section is connected to electric machine (8) for driving the compressor. The electric machine is connected to battery (12) through electrical operative connection (10).    USE - Charger for internal combustion engine of motor car.    ADVANTAGE - The energy recovery can be enabled during dragging operation of the internal combustion engine and charging of the internal combustion engine can be enabled even with a low charge of battery and low drive power from the circulation system. Thus, the efficiency of the internal combustion engine can be improved, so that appropriate ride comfort of the motor car can be achieved. The mechanical coupling of electric machine with the internal combustion engine can be achieved, so that the energy recovery can be achieved in certain driving conditions of the motor car. Thus, the charging of internal combustion engine can be performed, even if the necessary power input is not obtained from the battery and circulation system. The driving power necessary for charging the engine can be provided, without accessing the electrical power from the battery in a low charge condition or the thermal energy from the circulating system at low waste heat utilization state. An effective electrical connection between the battery and electric machine can be provided, so that the electrical energy generated by electric machine can be used for driving compressor reliably.    DESCRIPTION OF DRAWING(S) - The drawings show schematic views of the charger for internal combustion engine.    Charger (1)    Air intake (2)    Internal combustion engine (3)    Compressor (4)    Mechanical coupling (6)    Expansion section (7)    Electric machine (8)    Circulation system (9)    Electrical operative connection (10)    Battery (12)