Valve for a valve device

An internal combustion engine, comprising:

• at least one valve, the at least one valve including:
• a valve stem merging in an axial direction relative to a longitudinal valve stem axis into a valve disc projecting radially from the valve stem, the valve stem including an axial end portion opposite the valve disc, the axial end portion defining an axial face end and a lateral surface;
• and
• a valve cap coupled to the axial end portion of the valve stem, the valve cap including a cup base covering the axial face end of the axial end portion and an cup wall extending axially towards the valve disc;
• wherein the lateral surface includes at least one circumferential groove extending in a circumferential direction, and the cup wall on a radial inside includes at least one radially projecting elevation extending in the circumferential direction engaging into the at least one circumferential groove on the lateral surface;
• and
• wherein the cup wall further includes a fastening strap projecting radially from the radial inside towards the lateral surface of the axial end portion, the fastening strap interrupting the cup wall in the axial direction and engaging into a receiving groove disposed on the lateral surface.

A valve for a valve device, comprising:

• a valve stem merging into a valve disc in an axial direction of a valve stem axis, the valve disc projecting from the valve stem radially;
• a valve cap composed of a metal attached to an axial end portion of the valve stem opposite the valve disc, the valve cap covering a face end of the valve stem facing away from the valve disc and at least partially envelopes a lateral surface of the axial end portion of the valve stem;
• wherein the valve cap is secured to the axial end portion of the valve stem via a clip connection, and the valve cap is at least locally welded to the lateral surface of the axial end portion at a welded connection;
• and
• wherein the valve stem is composed of a metal including the following materials:
• silicon with a volumetric component of 23% to 27%;
• nickel with a volumetric component of 2.5% to 3.5%;
• magnesium with a volumetric component of 0.3% to 0.7%;
• manganese with a volumetric component of 0.3% to 0.7%;
• titanium with a volumetric component of up to 0.5%;
• zirconium with a volumetric component of up to 0.5%;
• chromium with a volumetric component of up to 0.5%;
• and
• a remainder of aluminium.