Control device of an exhaust gas-conducting section of an exhaust gas turbocharger

A control device of an exhaust gas-conducting section of an exhaust gas turbocharger, comprising:

• a closing device (9) comprising
• a closing element (10) and
• an element lever (11),
• wherein the closing device (9) is configured to pivot about an axis of rotation (19), and
• wherein the closing element (10) is configured to open and close a first flow cross-section (13) of the exhaust gas-conducting section (1),
• wherein the first flow cross-section (13) is formed in a partition wall lying between a first spiral channel (4) of the exhaust gas-conducting section (1) and a second spiral channel (5) of the exhaust gas-conducting section (1), and
• wherein the exhaust gas-conducting section (1) comprises a second flow cross-section (17) of a bypass duct (18) formed in the exhaust gas-conducting section (1), the bypass duct is configured to bypass a flow against a turbine wheel formed in the exhaust gas-conducting section (1), and
• wherein the closing element (10) comprises
• a first element portion (15) configured to close the first flow cross-section (13) and
• a second element portion (16) configured to close the second flow cross-section (17), and
• wherein the element lever (11) comprises a lever end portion (23) engaging into a cavity (20) of the closing element (10), and
• wherein the closing element (10) comprises a holding element (21) fixedly connected thereto and encompassed by the lever end portion (23), and
• wherein the lever end portion (23) comprises
• a first contact surface (26) and
• a second contact surface (27) axially spaced apart from the first contact surface (26) with respect to a longitudinal axis (22) of the closing element (10),
• wherein the first contact surface (26) comprises an axially-extending first partial surface (30) and a radially-extending second partial surface (31),
• wherein the axially-extending first partial surface (30) and the radially-extending second partial surface (31) are connected to one another by a third partial surface (32) formed between the axially-extending first partial surface (30) and the radially-extending second partial surface (31),
• wherein each of the partial surfaces (30, 31, 32) is configured to contact the closing element (10), and
• wherein each of the partial surfaces (30, 31, 32) and a base (29) of the closing element (10) are planar, and
• wherein the three partial surfaces (30, 31, 32) are formed contiguously and opposite an inner wall (28) and the base (29), and
• wherein the lever end portion (23) further comprises
• a first partial portion (33), comprising the first partial surface (30), and
• a second partial portion (34) comprising the second partial surface (31) and the third partial surface (32),
• wherein the second partial portion (34) is frustoconical.