Enhanced supercharging system and an internal combustion engine having such a system

1. A method for operating a supercharging system for an internal combustion engine including an exhaust gas propelled turbo supercharging system, a mechanical supercharging system, and an electrical supercharging/regenerating system, wherein, said exhaust gas propelled turbo supercharging system includes a turbine and a compressor, said compressor being arranged on a compressor shaft, said mechanical supercharging system coupling a crank shaft of the engine to said compressor, and said electrical supercharging/regenerating system coupling an electric motor to said compressor, said exhaust gas propelled turbo supercharging system, mechanical supercharging system, and electrical supercharging/generating system are arranged on a common axis including said compressor shaft and a drive shaft, said compressor shaft and said drive shaft being connected via a planet gear, which electric motor/generator is connected to said drive shaft and a power transmission connects a crankshaft of the internal combustion engine to said drive shaft via an one way clutch unit, comprising the steps of:

operating the supercharger/regenerating system in a first operating mode where said compressor in the supercharger/regenerating system is driven from said crankshaft and before said turbine has reached a speed of working area;

operating the supercharger/regenerating system in a second operating mode where said compressor in the supercharger/regenerating system is driven from said turbine,

wherein said generator receives power from said turbine when said turbine generates an excessive energy; and

operating the supercharger/regenerating system in a third operating mode where said compressor in the supercharger/regenerating system is driven from said electrical motor,

wherein when the internal combustion engine is operating in at least one of at low engine speeds and fast speed transients, the electric motor is generated to maintain boost pressure of compressed air to be delivered into said internal combustion engine.

2. A supercharging system for an internal combustion engine, comprising:

a turbocharging device including an exhaust gas propelled turbine and a compressor,

wherein said compressor is arranged on a compressor shaft;

a planet gear coupled to said compressor shaft and a drive shaft;

a one way clutch;

a power transmission connecting a crankshaft of the combustion engine to said drive shaft via the one way clutch unit; and

an electric motor/generator,

wherein an additional transmission connects a drive shaft of said electric motor/generator to said drive shaft, and

wherein the compressor of the turbocharging device delivers compressed air to the internal combustion engine during engine operation.

3. The supercharging system according to claim 2 , wherein,

said compressor shaft is connected to a sun gear of said planet gear, and

said drive shaft is connected to a ring gear of said planet gear.

4. The supercharging system according to claim 2 , wherein, said turbine and said compressor are arranged along a common axis with an inlet of the turbine subjected to exhaust gases, the exhaust gases causing a wheel of the turbine to rotate and thereby cause an impeller of the compressor to rotate at the speed of the turbine wheel, thereby compressing ambient air for delivery to an engine air intake, and

the power transmission connecting the crankshaft to said drive shaft functions as a driving device for transferring rotation to the common axis associated with the compressor before the turbine has reached a lowest working area.

5. The supercharging system according to claim 4 , wherein,

said electric motor/generator is an electric generator, and

said electric generator is connected to said drive shaft via said additional transmission for regenerating overflow energy from the exhaust gas driven turbine into electric power.

6. A supercharging system for an internal combustion engine, comprising:

an exhaust gas propelled turbo supercharging system;

a mechanical supercharging system; and

an electrical supercharging/regenerating system,

wherein,

said exhaust gas propelled turbo supercharging system includes a turbine and a compressor, said compressor being arranged on a compressor shaft,

said mechanical supercharging system couples a crankshaft of the engine to said compressor,

said electrical supercharging/regenerating system couples an electric motor/generator to said compressor,

said exhaust gas propelled turbo supercharging system, mechanical supercharging system, and electrical supercharging/regenerating system are arranged on a common axis including said compressor shaft and a drive shaft,

said compressor shaft and said drive shaft is connected via a planet gear,

said electric motor/generator is connected to said drive shaft,

a power transmission connects the crankshaft of the internal combustion engine to said drive shaft via a one way clutch unit,

wherein said compressor of said exhaust gas propelled turbo supercharging system delivers compressed air to the internal combustion engine during engine operation.

7. The supercharging system according to claim 6 , wherein,

said compressor shaft is connected to a sun gear of said planet gear, and

said drive shaft is connected to a ring gear of said planet gear.

8. An internal combustion engine, comprising:

an air intake manifold for supply of combustion air to at least one combustion chamber;

an exhaust manifold for discharge of exhaust gases from the at least one combustion chamber;

a supercharging system including:

i) a turbocharging device with a turbine wheel and a compressor, said turbine wheel and compressor being arranged along a common shaft,

ii) a planet gear coupled to said common shaft and to a drive shaft, and

iii) an electric motor/generator connected to said drive shaft, wherein,

a turbine inlet is connected to the exhaust manifold for being subjected to exhaust gases, causing the turbine wheel to rotate and thereby, via the common shaft, causing an impeller of the compressor to rotate at the speed of the turbine wheel, thereby compressing ambient air for delivery to the engine air intake manifold; and

a rotating engine crankshaft, wherein said rotating engine crankshaft, via a transmission, is connectable via a one way clutch unit to said drive shaft for transfer of rotation force for driving the compressor before the turbine has reached a lowest working area,

wherein the compressor of the turbocharging device delivers compressed air to the internal combustion engine during engine operation.

9. The internal combustion engine according to claim 8 , wherein the transmission connecting the rotating engine crankshaft to said drive shaft is a belt drive.