Piston of an internal combustion engine

1. A piston of an internal combustion engine, comprising

a piston upper part;

a piston lower part connected to the piston upper part;

a piston pin, which is mounted in the piston lower part and configured to connect the piston to a connecting rod of the internal combustion engine;

at least one transfer bore;

a first cooling space formed between the piston upper part and the piston lower part for cooling oil for cooling the piston;

a second cooling space, formed between the piston upper part and the piston lower part, connected to the first cooling space via the at least one transfer bore;

a cooling oil conduction sleeve arranged only in the piston lower part, configured to conduct cooling oil, conducted through a bore in the connecting rod, towards the first cooling space, wherein a guiding surface of the cooling oil conduction sleeve adjoins a support face of the piston lower part; and

at least one groove circulating in a circumferential direction introduced into the guiding surface of the cooling oil conduction sleeve.

2. The piston according to claim 1 ,

wherein the cooling oil conduction sleeve is formed as slit sleeve with a slit extending in an axial direction, which with the guiding surface spring-elastically presses against the support face of the piston lower part, and

wherein lubricating oil, via the slit, enters the respective groove of the cooling oil conduction sleeve and/or of the piston lower part.

3. The piston according to claim 1 , further comprising:

at least one oil pocket delimited in a circumferential direction is introduced into the guiding surface of the cooling oil conduction sleeve and/or into the support face of the piston lower part.

4. The piston according to claim 1 , further comprising:

at least one oil pocket delimited in a circumferential direction is introduced into the guiding surface of the cooling oil conduction sleeve and/or into the support face of the piston lower part.

5. The piston according to claim 4 , wherein the cooling oil conduction sleeve is formed as slit sleeve with a slit extending in an axial direction, which with the guiding surface spring-elastically presses against the support face of the piston lower part.

6. The piston according to claim 4 , further comprising:

at least one recess, which extends in a radial direction and penetrates the cooling oil conduction sleeve, introduced into the cooling oil conduction sleeve and configured to feed lubricating oil to a region between the cooling oil conduction sleeve and the piston lower part.

7. The piston according to claim 4 , further comprising:

at least two recesses, which extend in a radial direction and penetrate the cooling oil conduction sleeve introduced into the cooling oil conduction sleeve and configured to feed lubricating oil to a region between the cooling oil conduction sleeve and the piston lower part.

8. The piston according to claim 7 , wherein lubricating oil is fed to a respective oil pocket of the cooling oil conduction sleeve and/or of the piston lower part via a respective recess.

9. The piston according to claim 1 , further comprising:

at least one recess, which extends in a radial direction and penetrates the cooling oil conduction sleeve, introduced into the cooling oil conduction sleeve and configured to feed lubricating oil to a region between the cooling oil conduction sleeve and the piston lower part.

10. The piston according to claim 1 , wherein the at least one groove circulating in the circumferential direction is introduced into the guiding surface of the cooling oil conduction sleeve and into the support face of the piston lower part.

11. The piston according to claim 1 , wherein the at least one groove circulating in the circumferential direction is introduced into the support face of the piston lower part.

12. The piston according to claim 1 , wherein the first cooling space and the second cooling space are each open uninterrupted spaces.

13. The piston according to claim 1 , further comprising at least one groove circulating in a circumferential direction introduced into the support face of the piston lower part.

14. A piston of an internal combustion engine, comprising:

a piston upper part;

a piston lower part connected to the piston upper part;

a piston pin, which is mounted in the piston lower part and configured to connect the piston to a connecting rod of the internal combustion engine;

at least one transfer bore

a first cooling space formed between the piston upper part and the piston lower part for cooling oil for cooling the piston;

a second cooling space, formed between the piston upper part and the piston lower part, connected to the first cooling space via the at least one transfer bore;

a cooling oil conduction sleeve, configured to conduct cooling oil, conducted through a bore in the connecting rod, towards the first cooling space, wherein a guiding surface of the cooling oil conduction sleeve adjoins a support face of the piston lower part; and

at least one groove circulating in a circumferential direction introduced into the guiding surface of the cooling oil conduction sleeve and/or into the support face of the piston lower part; and

at least two recesses, which extend in a radial direction and penetrate the cooling oil conduction sleeve, introduced into the cooling oil conduction sleeve and configured to feed lubricating oil to a region between the cooling oil conduction sleeve and the piston lower part.

15. The piston according to claim 14 ,

wherein, the lubricating oil can be fed to a respective groove of the cooling oil conduction sleeve and/or of the piston lower part via a respective recess.