Abstract: 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 valve (9?) for opening or closing of the through-flow opening (10). According to the invention, the valve (9?) is configured to degressively open a first flow cross section (11) of the through-flow opening (10).

Abstract: An exhaust gas guide section for an exhaust gas turbocharger includes an actuator (1) with a wastegate (9) for opening and closing a bypass channel (31) of the exhaust gas guide section (1), wherein the bypass channel (31) is provided in the exhaust gas guide section (1) that can be flowed through to bypass a turbine wheel of the exhaust gas guide section (1) which is rotatably arranged in the exhaust gas guide section (1) in a wheel chamber of the exhaust gas guide section (1), and wherein the bypass channel (31) has a second flow cross section (33).

Abstract: A base portion of the support ring includes as many joining areas as connection pins. The joining areas respectively surround pin holes through which to insert end portions of the connection pins, and are arranged in a circumferential direction of the support ring. Cuts are formed around each joining area of the support ring in order to allow deformation of an intermediate portion of the support ring relative to the joining area.

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).

Abstract: A base portion of the support ring includes as many joining areas as connection pins. The joining areas respectively surround pin holes through which to insert end portions of the connection pins, and are arranged in a circumferential direction of the support ring. Cuts are formed around each joining area of the support ring in order to allow deformation of an intermediate portion of the support ring relative to the joining area.