Abstract: A boost control device for a turbocharger, assembled at room temperature, may not be geometrically optimal at turbocharger operating temperature. The geometric deviation in the boost control device introduced by the heating of the turbocharger to operating temperature, or during welding of the boost control device, is corrected by producing a first turbocharger at room temperature, determining the geometry of the deviation at operating temperature, producing a distance element that will introduce an equal and opposite deviation, introducing the equal and opposite deviation via the distance element in second and subsequent turbochargers, whereby thermal deviation and corrective deviation offset so that the turbocharger is geometrically accurate at operating temperature.

Abstract: A control arrangement (1) of an exhaust-gas turbocharger (4) which has a charger housing (2), the control arrangement (1) having a spindle (15) which has a first end region (24) arranged outside the charger housing (2) and a second end region (25) arranged within the charger housing (2) and having a valve disk (18) which is connected to the spindle (15), wherein the valve disk (18) and the spindle (15) are separate components, and wherein the spindle (15) is connected by way of its second end region (25) to the valve disk (18) by means of a connecting means (26).

Abstract: An exhaust-gas turbocharger (1) having a compressor (2) which has a compressor housing (3); a turbine (4) which has a turbine housing (5); and a compressor-side and/or turbine-side charge pressure regulating device (6) which has a shut-off element (7) which opens or closes a flow opening (9). The shut-off element (7) is in the form of a slide which is mounted on a guide (8) so as to be longitudinally displaceable along a longitudinal central line (LM8) of the guide (8), and the flow opening (9) is arranged at least substantially at a right angle (?) with respect to the longitudinal central line (LM8) of the guide (8).

Abstract: An exhaust-gas turbocharger (1), with a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and which has a wastegate duct (45) between the turbine housing inlet (8) and the turbine housing outlet (9), and a flap arrangement (33) comprising a pivotable flap lever (35), a flap plate (34), which is connected to the flap lever (35), for opening and closing the wastegate duct, and having a spring element (37) which is arranged between the flap lever (35) and a disc (36) fastened to the flap plate (34). The spring element (17) has an outer circumferential region (23) which is supported on a sliding contact surface (42), which is of curved form, of the disc (36).

Abstract: A compact flow control valve capable of providing long service life in a very hostile environment. The valve is a mono or dual coaxial slider valve capable of controlling two different functions sequentially, at least one of the functions being controlled progressively. The flow control valve controls the fluid connection between two volutes (6, 7) of a turbine housing (2) of a turbocharger as well as the fluid connection between the two volutes (6, 7) of the turbine housing (2) of the turbocharger and a waste gate port (9).

Abstract: A boost control device for a turbocharger, assembled at room temperature, may not be geometrically optimal at turbocharger operating temperature. The geometric deviation in the boost control device introduced by the heating of the turbocharger to operating temperature, or during welding of the boost control device, is corrected by producing a first turbocharger at room temperature, determining the geometry of the deviation at operating temperature, producing a distance element that will introduce an equal and opposite deviation, introducing the equal and opposite deviation via the distance element in second and subsequent turbochargers, whereby thermal deviation and corrective deviation offset so that the turbocharger is geometrically accurate at operating temperature.

Abstract: An exhaust-gas turbocharger (1), with a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and which has a wastegate duct (45) between the turbine housing inlet (8) and the turbine housing outlet (9), and a flap arrangement (33) comprising a pivotable flap lever (35), a flap plate (34), which is connected to the flap lever (35), for opening and closing the wastegate duct, and having a spring element (37) which is arranged between the flap lever (35) and a disc (36) fastened to the flap plate (34). The spring element (17) has an outer circumferential region (23) which is supported on a sliding contact surface (42), which is of curved form, of the disc (36).

Abstract: An exhaust-gas turbocharger (1), with: a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and which has a wastegate duct between the turbine housing inlet (8) and the turbine housing outlet (9), and a flap arrangement (10) comprising a pivotable flap lever (12), a flap plate (11), which is connected to the flap lever (12), for opening and closing the wastegate duct, and having a spring element (17) which is arranged between the flap lever (12) and a disc (18) fastened to the flap plate (11). The spring element (17) has an outer circumferential region (23) which is supported on a sliding contact surface (20), which is of curved form, of the flap lever (12).

Abstract: A compact flow control valve capable of providing long service life in a very hostile environment. The valve is a mono or dual coaxial slider valve capable of controlling two different functions sequentially, at least one of the functions being controlled progressively. The flow control valve controls the fluid connection between two volutes (6, 7) of a turbine housing (2) of a turbocharger as well as the fluid connection between the two volutes (6, 7) of the turbine housing (2) of the turbocharger and a waste gate port (9).

Abstract: A control arrangement (1) of an exhaust-gas turbocharger (4) which has a charger housing (2), the control arrangement (1) having a spindle (15) which has a first end region (24) arranged outside the charger housing (2) and a second end region (25) arranged within the charger housing (2) and having a valve disk (18) which is connected to the spindle (15), wherein the valve disk (18) and the spindle (15) are separate components, and wherein the spindle (15) is connected by way of its second end region (25) to the valve disk (18) by means of a connecting means (26).

Abstract: An exhaust-gas turbocharger (1) having a compressor (2) which has a compressor housing (3); a turbine (4) which has a turbine housing (5); and a compressor-side and/or turbine-side charge pressure regulating device (6) which has a shut-off element (7) which opens or closes a flow opening (9). The shut-off element (7) is in the form of a slide which is mounted on a guide (8) so as to be longitudinally displaceable along a longitudinal central line (LM8) of the guide (8), and the flow opening (9) is arranged at least substantially at a right angle (?) with respect to the longitudinal central line (LM8) of the guide (8).

Abstract: An exhaust-gas turbocharger (1), with: a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and which has a wastegate duct between the turbine housing inlet (8) and the turbine housing outlet (9), and a flap arrangement (10) comprising a pivotable flap lever (12), a flap plate (11), which is connected to the flap lever (12), for opening and closing the wastegate duct, and having a spring element (17) which is arranged between the flap lever (12) and a disc (18) fastened to the flap plate (11). The spring element (17) has an outer circumferential region (23) which is supported on a sliding contact surface (20), which is of curved form, of the flap lever (12).

Abstract: A bypass valve (1), in particular a compressor bypass valve, having a valve housing (2); a valve guide body (3), which is fixed in the valve housing (2); and a valve disk (4), which is guided between a closed position and an open position by the valve guide body (3) in the valve housing (2). The the valve guide body (3) and the valve disk (4) are in the form of plastic parts.