Abstract: The invention relates to apparatus (1) for a charging system of an internal combustion engine (31), comprising a housing (2) in which a secondary line (6) of an additional compressor (33) opens at an opening (54) into an air duct (5) of the internal combustion engine (31), a closing device (8) in the housing (2) for closing the air duct (5) upstream of the outlet (54), wherein the closing device (8) is arranged pivotably about a geometric axis of rotation (14), and at least one spring (21) arranged in the housing (2), wherein the spring (21) biases the closing device (8) in the closing direction, and wherein the closing device (8) is moved exclusively by the spring force of the spring (21) and the pressure condition upstream (55) and downstream (56) of the closing device (8).

Abstract: A compressor housing (16) of a radial compressor, in particular of a turbocharger of an internal combustion engine, in particular of a motor vehicle, having at least one housing part (10, 12) is described. A compressor impeller receiving chamber (56) and a spiral channel (46) radially outwardly surrounding said compressor impeller receiving chamber with respect to a rotational axis (18) of a compressor impeller are provided. A separate contour ring (14) is disposed within the at least one housing part (10), which at least radially outwardly surrounds the spiral channel (46). The contour ring (14) forms at least one section (44) of the radially outward inner contour of the spiral channel (46).

Abstract: In a method for manufacturing a plastic housing, in particular a compressor housing, by joining at least two contact surfaces of at least two plastic components, the contact surfaces are joined with each other by a hot gas welding process or by an electromagnetic resistance welding process or by a combination of both.

Abstract: A compressor housing (16) of a radial compressor at least two housing portions (10, 12, 14) at least partially of plastic material and defines compressor impeller installation space (48) and a spiral duct (46) that surrounds it radially on the outside with regard to a rotational axis (18) of an impeller. A securement structure (50) encloses the compressor impeller installation space (48) at least partially in an annular manner and is arranged in radial direction between the impeller installation space (48) and the spiral duct (46). The securement structure includes a separate burst-protection ring (50) with a tubular wall section (34) enclosing the impeller installation space (48) circumferentially.

Abstract: A radial compressor for a turbo charger has a housing with an inflow passage and a spiral passage. A compressor wheel is supported rotatably in the housing. The housing has at least two housing parts between which a cavity is formed. At least one opening is provided in the inflow passage, wherein the at least one opening fluidically connects the cavity with the inflow passage.

Abstract: A method for operating a diesel internal combustion engine having a compressed air source, a diesel particulate filter situated in the exhaust gas system, and a secondary air line and secondary air compressor for introducing secondary air into the exhaust gas system of the internal combustion engine, in which the compressed air source is used to drive the secondary air compressor.

Abstract: A housing for a radial compressor is comprised of at least two housing parts manufactured of plastic material for receiving a compressor wheel and for forming a spiral-shaped compressor passage, wherein into the housing between compressor wheel receptacle and compressor passage an annular space is introduced that annularly surrounds the compressor wheel and into which a stabilization element is introduced.

Abstract: A method for operating a diesel internal combustion engine having a compressed air source, a diesel particulate filter situated in the exhaust gas system, and a secondary air line and secondary air compressor for introducing secondary air into the exhaust gas system of the internal combustion engine, in which the compressed air source is used to drive the secondary air compressor.