Abstract: A control device for an exhaust gas turbocharger includes a closing device with a closing element and an element lever, pivoting around an axis. The closing element is designed to open and close a first flow cross-section formed by a partition wall between two spiral channels in the exhaust gas-conducting section. Additionally, there is a second flow cross-section associated with a bypass duct designed to direct flow around a turbine wheel. The closing element comprises two parts: one for the first flow cross-section and another for the second flow cross-section. The element lever features an arm that fits into a cavity in the closing element. This cavity has an inner surface, and the arm's outer surface matches the cavity's shape but with differing dimensions. The arm's peripheral surface includes multiple distinct sections, enhancing the engagement with the closing element's cavity.

Abstract: A control device of an exhaust gas-conducting section of a turbocharger includes a pivotable closing device with a closing element and an element lever. A first element portion thereof opens and closes a first flow cross-section of a flow connection and a second element portion opens and closes a second flow cross-section of a bypass duct of the exhaust gas-conducting section. The element lever includes a lever end portion engaging into a cavity of the closing element. A holding element is fixedly connected to the closing element. The lever end portion includes a first contact surface and, axially spaced apart, a second contact surface. The first contact surface includes an axially-extending first partial surface and a radially-extending second partial surface connected to one another by a third partial surface. The partial surfaces are designed to be able to effect contact with the closing element.

Abstract: An exhaust gas-conducting section of an exhaust turbocharger comprises a duct with a through-flow opening which can be fully or at least partially blocked or released by a closure element of a control device. The closure element is designed as a poppet valve. The closure element can be moved by an actuator can be disposed in a wall of the exhaust gas-conducting section. The closure element has a closure body with an annular section surface on its bottom surface which faces the through-flow opening. The section surface corresponds to an element seat formed in the wall. Its top surface faces away from the bottom surface and is designed in a profiled manner in order to produce a top surface at least partially corresponding to another element seat and/or to achieve flow-optimized circulation.

Abstract: The invention relates to a regulating device for a turbocharger. The regulating device (8) is received in a turbocharger (2) exhaust gas conducting section (1) through which exhaust gas can flow, and a fluid flow to a turbine wheel which is rotatably received in the exhaust gas conducting section (1) can be conditioned using the regulating device (8). A flow channel (10; 31) which is formed in the exhaust gas conducting section (1) is to be opened and closed using a cover element (9) of the regulating device (8), and the cover element (9) is arranged on a regulating device (8) pivot arm (38) which can be pivoted about a rotational axis (34). According to the invention, the cover element (9) is designed to open and close a flow channel designed as a bypass channel (31) for bypassing the turbine wheel and/or for opening and closing a flow channel, which is designed as a through-flow opening (10), between a first spiral channel (4) and a second spiral channel (5) of the exhaust gas conducting section (1).

Abstract: The invention relates to an exhaust gas guide section for an exhaust gas turbocharger, with a control device, comprising a cover element (9) for opening and closing a bypass duct (31) of the exhaust gas guide section (1), wherein the bypass duct (31) is provided in the through-flow exhaust gas guide section (1) for bypassing a turbine wheel which is rotatably accommodated in a wheel chamber of the exhaust gas guide section (1), and wherein the bypass duct (31) comprises a second flow cross section (33). According to the invention, the second flow cross section (33) may be degressively opened by means of the cover element (9) at least starting from a closed position into an intermediate position.

Abstract: The invention relates to an exhaust gas guide section for an exhaust gas turbocharger, with a first spiral channel (4) and a second spiral channel (5) for the inflow of a turbine wheel which is rotatably accommodated in the through-flow exhaust gas guide section, wherein a through-flow opening (10) is provided between the first spiral channel (4) and the second spiral channel (5), which is formed for inducing an overflow of exhaust gas from the first spiral channel (4) into the second spiral channel (5) and vice versa, and wherein the through-flow opening (10) comprises a movable covering element (9?) for opening or closing of the through-flow opening (10). According to the invention, the covering element (9?) is configured to degressively open a first flow cross section (11) of the through-flow opening (10).