Hybrid system comprising a supercharging system and method for operation

A method for operating a hybrid propulsion system of a vehicle having an internal combustion engine (1), the hybrid propulsion system comprising:

• a supercharging system for the internal combustion engine (1) including an exhaust gas propelled turbo supercharging system, a mechanical supercharging system, and an electrical supercharging/regenerating system;
• wherein the exhaust gas propelled turbo supercharging system includes a turbo charging device (6);
• the turbo charging device comprising a turbine (7) and a compressor (8), the compressor being arranged on a compressor shaft (9);
• the exhaust gas propelled turbo supercharging system coupling the turbine (8) to at least one exhaust outlet of the internal combustion engine (1), the electrical supercharging/regenerating system coupling an electric motor/generator (20) to the compressor shaft via a planetary gear (25), and the mechanical supercharging system coupling a crank shaft of the engine (1) to the electric motor via a clutch (18a),
• the method comprising operating the hybrid propulsion system in at least one of a plurality of different operating modes;
• the plurality of operating modes comprising:
• an operating mode E where exhaust gas energy is regenerated to electrical energy;
• an operating mode F where exhaust gas energy is regenerated to mechanical energy;
• an operating mode G comprising electrically driven supercharging of the internal combustion engine (1);
• and
• an operating mode H comprising mechanically driven supercharging of the internal combustion engine (1).