Abstract: A turbocharger comprises a shaft connecting a turbine wheel, which is disposed in a turbine housing, to an impeller wheel. Between the two is a bearing system having a bearing housing and bearings for the shaft disposed therein. The shaft is fitted with at least one heat insulation between the turbine wheel and the bearing system, of which the heat conductivity is lower than that of the portions of the shaft which are adjoining said insulation and which hampers heat transmission through the shaft.

Abstract: The invention relates to an exhaust gas turbocharger (1) having a housing and having a shaft (2) which is arranged so as to be capable of rotating about its longitudinal axis in the housing and on which a turbine wheel (4) and a compressor wheel (3) are seated and which is guided in radial bearings (5, 6) which are embodied as magnetic bearings and in at least one axial bearing (9), the bearings (5, 6, 9) each having a bearing plate (12, 14, 16) which is seated on the shaft (2) and at least one stator (19, 20, 21, 22, 49, 50) which lies axially opposite said axial bearing (9) on at least one side, forming a gap. In order to cool the bearings, it is proposed according to the invention that at least one flow duct (62, 65), via which at least one bearing gap can have an air stream applied to it, is formed in the housing.

Abstract: The invention concerns an exhaust gas turbocharger (1) having a shaft (2) on which a turbine wheel (4) and a compressor wheel (3) sit and which is guided in radial bearings (5, 6) and in at least one axial bearing (9), which is characterized in that the radial bearings (5, 6) are embodied as passive magnetic bearings having permanent magnets (23 through 31) generating axial magnetic fluxes; and the axial bearing (9) is embodied as an active magnetic bearing having an electromagnet (55), an axial sensor, and a controller for controlling the electrical current impinging upon the electromagnet (55).

Abstract: A turbocharger comprises a shaft connecting a turbine wheel, which is disposed in a turbine housing, to an impeller wheel. Between the two is a bearing system having a bearing housing and bearings for the shaft disposed therein. The shaft is fitted with at least one heat insulation between the turbine wheel and the bearing system, of which the heat conductivity is lower than that of the portions of the shaft which are adjoining said insulation and which hampers heat transmission through the shaft.

Abstract: The invention concerns an exhaust gas turbocharger (1) having a shaft (2) on which a turbine wheel (4) and a compressor wheel (3) sit and which is guided in radial bearings (5, 6) and in at least one axial bearing (9), which is characterized in that the radial bearings (5, 6) are embodied as passive magnetic bearings having permanent magnets (23 through 31) generating axial magnetic fluxes; and the axial bearing (9) is embodied as an active magnetic bearing having an electromagnet (55), an axial sensor, and a controller for controlling the electrical current impinging upon the electromagnet (55).

Abstract: A charged internal combustion engine (1) having at least one stage of charging by a turbocharger (3), in which at least one supplemental compressor (4) is connected parallel to or in series with the turbocharger, and in which the supplemental compressor (4) has a drive independent from the working medium cycle of the internal combustion engine.

Abstract: A charged internal combustion engine (1) having at least one stage of charging by a turbocharger (3), in which at least one supplemental compressor (4) is connected parallel to or in series with the turbocharger, in which the supplemental compressor (4) has a drive independent form the working medium cycle of the internal combustion engine.

Abstract: A charged internal combustion engine (1) having at least one stage of charging by a turbocharger (3), in which at least one supplemental compressor (4) is connected parallel to or in series with the turbocharger, and in which the supplemental compressor (4) has a drive independent from the working medium cycle of the internal combustion engine.

Abstract: The invention relates to an exhaust gas turbocharger (1) having a housing and having a shaft (2) which is arranged so as to be capable of rotating about its longitudinal axis in the housing and on which a turbine wheel (4) and a compressor wheel (3) are seated and which is guided in radial bearings (5, 6) and in at least one axial bearing (9), the radial bearings (5, 6) being embodied as passive, permanent-magnetic bearings which each have a bearing plate (12, 16) which is seated on the shaft (2) as a rotor, and at least one stator (19, 20, 21, 22) which is disposed axially opposite to said rotor. In order to achieve a radial oscillation damping of the shaft (2) in a simple manner, it is proposed according to the invention that a resilient element (60, 61) is disposed between the stator (19, 20, 21, 22) and a part (37, 38) which is fixed to the housing.

Abstract: Electric motor driveable compressor (1), in which the electric motor includes a rotor with rotor shaft (20), which acts in cooperation with a stator (50) provided in the motor housing (52, 56, 58, 60), the rotor shaft (20) being mounted on the motor housing (56, 58, 60) via at least two bearings (46) and connected fixed against rotation with the compressor wheel (10) at an axial receiving segment (30), wherein the rotating components, comprised essentially of the rotor with rotor shaft (20) and compressor wheel (10), are so designed, that their first critical bending fundamental frequency w1 lies above the maximal operationally occurring rotation speed nmax.

Abstract: The invention relates to an exhaust gas turbocharger (1) having a housing and having a shaft (2) which is arranged so as to be capable of rotating about its longitudinal axis in the housing and on which a turbine wheel (4) and a compressor wheel (3) are seated and which is guided in radial bearings (5, 6) which are embodied as magnetic bearings and in at least one axial bearing (9), the bearings (5, 6, 9) each having a bearing plate (12, 14, 16) which is seated on the shaft (2) and at least one stator (19, 20, 21, 22, 49, 50) which lies axially opposite said axial bearing (9) on at least one side, forming a gap. In order to cool the bearings, it is proposed according to the invention that at least one flow duct (62, 65), via which at least one bearing gap can have an air stream applied to it, is formed in the housing.

Abstract: An exhaust gas-driven turbocharger (1) exhibits an adjustable radial turbine (2) which powers a compressor (3) by way of a common shaft (4), whereby a turbine housing (5) designed with a multiplicity of scrolls surround the turbine wheel (6) and exhibits at least two afflux ports (7a, 7b) annularly encompassing the turbine wheel (6), whose outlets (8a, 8b) at least partly surround the wheel approach (9) of the turbine wheel (6) and which are at an axial distance from one another. An annular, axially displaceable coupler (15) is provided for opening and closing the outlet (8a, 8b) of at least one afflux port (7a, 7b), so that the boost pressure of the turbine can be influenced thereby.

Abstract: The invention relates to an exhaust gas turbocharger (1) having a housing and having a shaft (2) which is arranged so as to be capable of rotating about its longitudinal axis in the housing and on which a turbine wheel (4) and a compressor wheel (3) are seated and which is guided in radial bearings (5, 6) and in at least one axial bearing (9), the radial bearings (5, 6) being embodied as passive, permanent-magnetic bearings which each have a bearing plate (12, 16) which is seated on the shaft (2) as a rotor, and at least one stator (19, 20, 21, 22) which is disposed axially opposite to said rotor. In order to achieve a radial oscillation damping of the shaft (2) in a simple manner, it is proposed according to the invention that a resilient element (60, 61) is disposed between the stator (19, 20, 21, 22) and a part (37, 38) which is fixed to the housing.

Abstract: The invention concerns a charged internal combustion engine (1) with at least one stage of charging by a turbocharger (3).

Abstract: The invention concerns a charged internal combustion engine (1) with at least one stage of charging by a turbocharger (3). The invention is characterized by the fact that at least one supplemental compressor (4) is connected parallel to or in series with the turbocharger, where the supplemental compressor (4) has a drive independent form the working medium cycle of the internal combustion engine.

Abstract: The invention concerns a charged internal combustion engine (1) with at least one stage of charging by a turbocharger (3).

Abstract: The invention concerns a charged internal combustion engine with at least one stage of charging by a turbocharger.