Wastegate arrangement for a turbine, turbine for an exhaust gas turbocharger, exhaust gas turbocharger, motor vehicle and method for operating an exhaust gas turbocharger

摘要

The present invention relates to a wastegate arrangement 1 for a turbine 2, in particular for an exhaust gas turbocharger 3, with a wastegate valve 4, which is designed to guide exhaust gas past the turbine 2, with a wastegate shaft 5 with a first bearing point 6 and with a second bearing 7, which are used for the rotatable mounting of the wastegate shaft 5, with a lever arm 8, which is attached to the wastegate shaft 5 in a rotationally fixed manner and is designed in this way, the wastegate shaft when a lever arm force 9 is applied to the lever arm 8 5 to be set in rotation and with a wastegate flap 10 which is attached to the wastegate shaft 5 in a rotationally fixed manner and which controls an amount of exhaust gas flowing through the wastegate valve 4 and which is arranged in relation to the first and second bearing points 6, 7 such that in at least one of the bearing points 6, 7 when the wastegate valve 4 opens O and / or closes S a normal lever arm force resulting from the lever arm force 9 t 11 and an exhaust gas normal force 13 resulting from an exhaust gas force 12 acting on the wastegate flap 10 have opposite force action directions. The present invention further relates to a turbine 2, an exhaust gas turbocharger 3, a motor vehicle with such an exhaust gas turbocharger 3 and a method for operating such an exhaust gas turbocharger 3.