Abstract: A valve device for controlling a bypass of an exhaust-gas turbocharger may include a valve disc for opening and closing a bypass opening of a turbine, and the bypass opening may be surrounded by a valve seat. A mandrel may protrude on a rear side of the valve disc. An adjusting lever for pivoting the valve disc may be connected with the mandrel. The adjusting lever may have a through opening that may be pierced by the mandrel. The through opening may be radially limited by an interior surface of the adjusting lever. At least one spring element may be arranged in the through opening, and the at least one spring element may subject the mandrel to a radial force.

Abstract: An actuating device for a valve of an exhaust-gas turbocharger may include a lever arm and a flap plate connected to one another for closing and opening the valve. The flap plate may have a concave recess, and the lever arm may have a spherical region configured in a complimentary manner to the concave recess of the flap plate. A holding device may be disposed on the flap plate and engage around the spherical region of the lever arm to secure the flap plate on the lever arm. The holding device may include at least two holding elements and a connecting element that connects the at least two holding elements.

Abstract: An actuating device for a valve of an exhaust-gas turbocharger may include a lever arm and a flap plate connected to one another for closing and opening the valve. The flap plate may have a concave recess, and the lever arm may have a spherical region configured in a complimentary manner to the concave recess of the flap plate. A holding device may be disposed on the flap plate and engage around the spherical region of the lever arm to secure the flap plate on the lever arm. The holding device may include at least two holding elements and a connecting element that connects the at least two holding elements.

Abstract: A valve device for controlling a bypass of an exhaust-gas turbocharger may include a valve disc for opening and closing a bypass opening of a turbine, and the bypass opening may be surrounded by a valve seat. A mandrel may protrude on a rear side of the valve disc. An adjusting lever for pivoting the valve disc may be connected with the mandrel. The adjusting lever may have a through opening that may be pierced by the mandrel. The through opening may be radially limited by an interior surface of the adjusting lever. At least one spring element may be arranged in the through opening, and the at least one spring element may subject the mandrel to a radial force.