Oil sump for an internal combustion engine

1. An oil pan for an internal combustion engine, in which an oil suction space is formed by the arrangement of a baffle wall provided with several through-openings and at least one flap, wherein at least one retaining device, on which the flap is supported and/or fastened, is provided on the baffle wall, wherein several fastening openings of different cross sections are provided in the flap to attach the flap to the retaining device, and compensate for thermal expansion of the flap.

2. An oil pan according to claim 1 , wherein the fastening openings are arranged next to each other, wherein the cross section of at least one centrally located fastening opening is smaller than that of at least one of the other fastening openings.

3. An oil pan according to claim 2 , wherein at least one fastening opening that is spaced from the centrally located fastening opening is designed in the form of a slot.

4. An oil pan according claim 3 further comprising a plurality of fastening openings that are spaced from the centrally located fastening opening, wherein the spaced fastening openings are slots of different lengths.

5. An oil pan according to claim 1 , wherein the retaining device comprises a contact section on which the flap is supported, wherein the cross section of each fastening opening is larger than the cross section of the contact section.

6. An oil pan according to claim 1 , wherein the retaining device comprises a retaining section at the end of the contact section, the distance between the retaining section and the baffle wall being greater than a thickness of the flap.

7. An oil pan according to claim 1 further comprising several retaining devices provided along the baffle wall, the retaining sections of the retaining devices comprising different cross sections.

8. An oil pan according to claim 1 , wherein the retaining device is an integral part of the baffle wall.