Valve assembly for a turbine of an exhaust gas turbocharger, turbine for an exhaust gas turbocharger and motor vehicle

Abstract

Valve assembly (10) for opening and closing at least one opening of a turbine of an exhaust gas turbocharger of an internal combustion engine through which exhaust gas flows, comprising a valve element (12) movable between at least one closed position for closing the opening and at least one open position for opening the opening, comprising a lever (14) formed separately from the valve element (12) and having a retaining area (16) with a hollow cross-section (18), by means of which the valve element (12) mounted on the retaining area (16) and held on the lever (14), which has a pin (24) completely penetrating a through-opening (28) of the retaining area (16), is movable between the closed position and the open position, and comprising a component formed separately from the lever (14) and separately from the valve element (12),a fastening element (22) arranged in the hollow cross-section (18) and on a length (L2) of the pin (24), by means of which the valve element (12) is held on the lever (14) and the lever (14) has a sleeve (39) arranged in the hollow cross-section (18) and limiting the through-opening (28),which is at least partially surrounded along its circumferential direction by a hollow cross-sectional area (Q2) of the hollow cross-section (18) and an end face (S4) of the fastening element (22) facing the axial direction (26) of the pin (24) of the sleeve (39) can be directly supported on an end (E3) of the sleeve (39) and the fastening element (22) is arranged on the length region (L2) of the pin (24) projecting from the sleeve (39) in the hollow cross-section (18) and extends away from the pin (24) in the radial direction (34) of the pin (24) towards a wall (W2) of the holding area (16) that bounds the hollow cross-sectional area (Q2) in the radial direction (34) of the pin (24), characterized in that: , - thereby the fastening element (22) at least predominantly covers the hollow cross-sectional area (Q2) in the axial direction (26) of the pin (24), and - an outer circumferential surface (M) of the fastening element (22) pointing away from the pin (24) in the radial direction (34) of the pin (24) and facing the wall (W2) can be supported or supported directly on the wall (W2) in the radial direction (34) of the pin (24).

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