Patent ID: 11879379
Assignee: DAIMLER TRUCK AG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. An actuating device (10) for actuating a valve element of an exhaust gas turbocharger, comprising:
a pressure chamber (18) which is delimited in part by a first housing element (12) and in part by a diaphragm (14) formed separately from the first housing element (12), wherein compressed air is introducible into the pressure chamber (18) and wherein the diaphragm (14) is reversibly deformable in order to actuate the valve element;
wherein the diaphragm (14) is held on the first housing element (12) by a first cooling ring (32), wherein the first cooling ring (32) has a first receiving space (36), and wherein the first receiving space (36) of the first cooling ring (32) is at least partially filled with sodium; and
a second receiving space (22) opposite the pressure chamber (18) and delimited in part by the diaphragm (14) and in part by a second housing element (24), wherein a return spring (26) for resetting the diaphragm (14) is disposed in the second receiving space (22);
wherein the diaphragm (14) is held on the second housing element (24) by a second cooling ring (34), wherein the second cooling ring (34) has a third receiving space (38), and wherein the third receiving space (38) of the second cooling ring (34) is at least partially filled with sodium.