US 11,879,379 B2
Actuating device for actuating a valve element of an exhaust gas turbocharger
Sven Skorupa, Walddorfhaeslach (DE); and Martin Pfeiffer, Winnenden (DE)
Assigned to Daimler Truck AG, Leinfelden-Echterdingen (DE)
Appl. No. 17/616,027
Filed by Daimler AG, Stuttgart (DE)
PCT Filed May 14, 2020, PCT No. PCT/EP2020/063416
§ 371(c)(1), (2) Date Dec. 2, 2021,
PCT Pub. No. WO2020/244897, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 10 2019 003 909.2 (DE), filed on Jun. 3, 2019.
Prior Publication US 2022/0316390 A1, Oct. 6, 2022
Int. Cl. F02B 37/18 (2006.01)
CPC F02B 37/186 (2013.01) [F05D 2220/40 (2013.01)] 2 Claims
OG exemplary drawing
 
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.