Abstract: An exhaust-gas module A for an internal combustion engine, which exhaust-gas module has a base housing having a first side wall, at least one second side wall, an inlet for connection to the internal combustion engine and at least one outlet, wherein the inlet is arranged in the first side wall, and having multiple exhaust-gas purification components which are arranged in the base housing, wherein at least one SCR and/or one DOC are/is provided, wherein the at least one outlet is arranged in the second side wall and serves for the connection of an exhaust tailpipe of the internal combustion engine and/or alternatively for the coupling of an attachment housing, wherein the rest of the base housing, with the exception of the second side wall, is formed without outlets, wherein a connection contour with a circumferential contour U1 which has a basic shape G1 is provided for the connection of the attachment housing, wherein the connection contour delimits the second side wall at the edge, wherein at least one of

Abstract: A valve flap device having at least one valve housing having a shaft comprising a bearing surface and a valve axis, the shaft being rotationally supported about the valve axis by means of the bearing surface in the valve housing. A bearing element having a sliding bearing surface, wherein the bearing surface of the shaft contacts the sliding bearing surface. A bearing housing provided on the valve housing, in which the bearing element is supported at least in the radial direction to the valve axis, wherein the bearing element has an outer surface contacting the bearing housing. The support of the shaft is intended to be sufficiently tightly sealed, even for gaseous media, while simultaneously ensuring precise and statically determinate support.

Abstract: An exhaust-gas module A for an internal combustion engine, which exhaust-gas module has a base housing having a first side wall, at least one second side wall, an inlet for connection to the internal combustion engine and at least one outlet, wherein the inlet is arranged in the first side wall, and having multiple exhaust-gas purification components which are arranged in the base housing, wherein at least one SCR and/or one DOC are/is provided, wherein the at least one outlet is arranged in the second side wall and serves for the connection of an exhaust tailpipe of the internal combustion engine and/or alternatively for the coupling of an attachment housing, wherein the rest of the base housing, with the exception of the second side wall, is formed without outlets, wherein a connection contour with a circumferential contour U1 which has a basic shape G1 is provided for the connection of the attachment housing, wherein the connection contour delimits the second side wall at the edge, wherein at least one of

Abstract: An exhaust-gas heat exchanger for an exhaust system for cooling an exhaust-gas flow, having an inner pipe and an outer pipe, wherein the two pipes are indirectly or directly welded to one another in sealing fashion at the inlet side, a jacket pipe is arranged around the outside of the outer pipe and an annular gap for coolant is arranged between the outer pipe and the jacket pipe, and the inner pipe has an axial flow cross section (A2) at the end as viewed in the flow direction (S) and has a perforation (P2), which forms a radial flow cross section, in a direction at right angles to a flow direction (S). Between the inner pipe and the outer pipe there is formed an exhaust-gas duct for the exhaust-gas flow, wherein an intermediate pipe which is mounted in displaceable and/or rotatable fashion on the inner pipe is provided with a perforation (P4) by which the axial flow cross section (A2) of the inner pipe can be at least partially closed off.

Abstract: A valve flap device for an exhaust system of a motor vehicle, having at least one tubular valve housing with a flow cross section running perpendicular to a central axis and being formed by the inner geometry and a shaft which can turn about a valve axis with a valve flap mounted on the shaft, being mounted in the valve housing to close the flow cross section. The valve flap device can be made with low material input and at the same time with low fabrication expense at low costs. For this, the valve housing is made from a tubular blank of sheet metal with a tube diameter that is calibrated to the flow cross section at least partially by mechanical, plastic forming.

Abstract: An exhaust-gas heat exchanger for an exhaust system for cooling an exhaust-gas flow, having an inner pipe and an outer pipe, wherein the two pipes are indirectly or directly welded to one another in sealing fashion at the inlet side, a jacket pipe is arranged around the outside of the outer pipe and an annular gap for coolant is arranged between the outer pipe and the jacket pipe, and the inner pipe has an axial flow cross section (A2) at the end as viewed in the flow direction (S) and has a perforation (P2), which forms a radial flow cross section, in a direction at right angles to a flow direction (S). Between the inner pipe and the outer pipe there is formed an exhaust-gas duct for the exhaust-gas flow, wherein an intermediate pipe which is mounted in displaceable and/or rotatable fashion on the inner pipe is provided with a perforation (P4) by which the axial flow cross section (A2) of the inner pipe can be at least partially closed off.

Abstract: A valve flap device having at least one valve housing having a shaft comprising a bearing surface and a valve axis, the shaft being rotationally supported about the valve axis by means of the bearing surface in the valve housing. A bearing element having a sliding bearing surface, wherein the bearing surface of the shaft contacts the sliding bearing surface. A bearing housing provided on the valve housing, in which the bearing element is supported at least in the radial direction to the valve axis, wherein the bearing element has an outer surface contacting the bearing housing. The support of the shaft is intended to be sufficiently tightly sealed, even for gaseous media, while simultaneously ensuring precise and statically determinate support.

Abstract: A valve flap device for an exhaust system of a motor vehicle, having at least one tubular valve housing with a flow cross section running perpendicular to a central axis and being formed by the inner geometry and a shaft which can turn about a valve axis with a valve flap mounted on the shaft, being mounted in the valve housing to close the flow cross section. The valve flap device can be made with low material input and at the same time with low fabrication expense at low costs. For this, the valve housing is made from a tubular blank of sheet metal with a tube diameter that is calibrated to the flow cross section at least partially by mechanical, plastic forming.