Filter device for a filter system of a motor vehicle

An apparatus for a filter system of a motor vehicle, comprising:

• a filter element which is securable to a filter module by rotating about a central axis in a rotational direction and is releasable from the filter module by rotating about the central axis in an opposite direction to the rotational direction;
• a filter element securing structure disposed on the filter element, wherein the filter element securing structure interacts with a respective securing structure disposed on the filter module to form a bayonet closure;
• wherein the filter element securing structure is an arc-shaped guide groove in a base of the filter element, wherein the arc-shaped guide groove has an insertion opening at a first end and a latching contour at a second end, wherein the respective securing structure disposed on the filter module is a head pin that is receivable in the arc-shaped groove, and wherein an edge region of the arc-shaped guide groove slopes from the insertion opening to the latching contour such that when the filter element is rotated in the rotational direction to secure the filter element to the filter module a contact force is generated in an axial direction from the filter element securing structure disposed on the filter element to the respective securing structure disposed on the filter module and such that the contact force is increased with a progression of the rotation of the filter element;
• and
• a latching cam disposed on the filter element, wherein the latching cam interacts with a respective snap-in tongue disposed on the filter module to secure the filter element on the filter module.

A filter system of a motor vehicle, comprising:

• a filter module;
• and
• a filter element which is securable to the filter module by rotating about a central axis in a rotational direction and is releasable from the filter module by rotating about the central axis in an opposite direction to the rotational direction;
• wherein a filter element securing structure is disposed on the filter element and wherein the filter element securing structure interacts with a respective securing structure disposed on the filter module to form a bayonet closure;
• wherein the filter element securing structure is an arc-shaped guide groove in a base of the filter element, wherein the arc-shaped guide groove has an insertion opening at a first end and a latching contour at a second end, wherein the respective securing structure disposed on the filter module is a head pin that is receivable in the arc-shaped groove, and wherein an edge region of the arc-shaped guide groove slopes upwardly from the insertion opening to the latching contour such that when the filter element is rotated in the rotational direction to secure the filter element to the filter module a contact force is generated in an axial direction by the edge region that slopes upwardly from the filter element securing structure disposed on the filter element to the respective securing structure disposed on the filter module and such that the contact force generated by the edge region that slopes upwardly is increased with a progression of the rotation of the filter element.