Filter system and filter element

1. A filter system for filtering a fluid, comprising:

at least one filter element;

a filter housing having

at least one first housing part; and

a second housing part forming a lid of the filter housing;

a coupling device, comprising

at least one first coupling part; and

at least one second coupling part configured to engage and removably couple the at least one filter element to the second housing part;

wherein the first coupling part comprises

at least one first latching member and control surfaces;

wherein the at least one second coupling part comprises

at least one second latching member configured to operatively connect to respective ones of the at least one first latching member and control surfaces;

wherein the at least the first latching member and the at least one second latching member are configured to functionally connect to each other when joined and the control surfaces and the at least one second latching member are brought into operative connection when released from the second housing part and filter element;

wherein the at least one second latching member each have three bevels;

wherein at least two of the bevels cooperate with the control surfaces to release the second housing part from the filter element upon a relative rotation of the filter element around a longitudinal axis counter to the second housing part;

wherein the bevels each comprise

at least one axially oriented axial bevel pointing in radial direction, one axially oriented lateral axial bevel pointing in circumferential direction and a tangentially oriented tangential bevel, and

wherein, in the relative rotation of the filter element around the longitudinal axis (L) counter to the second housing part by the cooperation of the tangential bevels with the control surfaces of the first coupling part, a disengaging deformation of the at least one second latching member in the radial direction and, by means of the cooperation of the lateral axial bevels with the control surfaces, a release movement in the axial direction can be achieved.

2. The filter system according to claim 1 , wherein

the second latching member comprises latching lugs.

3. The filter system according to claim 2 , wherein

the axial bevel, the lateral axial bevel and the tangential bevel pointing in radial direction are available in a corner region of the latching lug.

4. The filter system according to claim 1 , wherein

the first latching member and the second latching member are configured such that, by a relative axial movement from the second housing part and filter element in the mounting direction, the second latching member can be latched to the first latching member, wherein the axial bevels in conjunction with the control surfaces of the first latching member effect a latching deformation of the second latching member in the radial direction.

5. The filter system according to claim 1 , wherein

the first coupling part is arranged on the second housing part; and

the second coupling part is arranged on the filter element; or

wherein the first coupling part is arranged on filter element; and

the second coupling part is arranged on the second housing part.

6. The filter system according to claim 1 , wherein

the coupling device is arranged on an outside of regions with mechanical clamping points of the second housing part.

7. The filter system according to claim 1 , wherein

the control surfaces include

at least one axially oriented bevel; and

at least one tangentially oriented bevel.

8. The filter system according to any of claim 1 , wherein

the axially oriented axial bevel pointing in radial direction and the axially oriented lateral axial bevel pointing in a circumferential direction are inclined at an angle of at least 90 degrees to one another.

9. The filter system according to claim 1 , wherein

the first latching member includes openings and/or recesses.

10. The filter system according to claim 1 , wherein

the first coupling part is formed as a sleeve-shaped section;

wherein the first latching member is arranged in a wall of the sleeve-shaped section;

wherein the first latching member is embodied as windows penetrating the wall, or as recesses that do not penetrate the wall.

11. The filter system according to claim 2 , wherein

the second coupling element is arranged in the radial direction inside the first coupling element;

wherein the latching lugs are arranged pointing radially outward.

12. The filter system according to any of claim 2 , wherein

the filter element can be inserted and extracted together in unison with the second housing part along a longitudinal axis (L) in the filter housing when the latching members are engaged and latched.

13. A filter element for installation in a filter system according to any of claim 1 , comprising:

at least one end plate arranged on an end face of a filter bellows of a filter medium and a coupling part; and configured to engage with a corresponding, housing-side coupling part of a coupling device;

wherein the coupling part of the filter element has one or a plurality of latching members;

wherein the latching members comprise

bevels, which are formed to effect a release of the housing part from the filter element when there is a relative rotation of the filter element around its longitudinal axis (L) counter to a housing part;

wherein the bevels comprise

at least one axially oriented axial bevel pointing in radial direction;

one axially oriented lateral axial bevel pointing in circumferential direction; and

one tangentially oriented tangential bevel;

wherein a loosening deformation of the latching member in radial direction can first be effected via the tangential bevel and a disengaging movement in axial direction can be effected via the lateral axial bevels.

14. The filter system according to claim 13 , wherein

the latching member comprises

latching lugs.

15. The filter system according to claim 13 , wherein

the axial bevel, the lateral axial bevel and the tangential bevel pointing in radial direction are available in a corner region of the latching lug.