Abstract: A rotating assembly for a turbocharger can include a center housing that includes a through bore having a central axis; a bearing cartridge positioned in the through bore where the bearing cartridge includes an outer race, an inner race and rolling elements disposed between the inner race and the outer race; an anisotropic member positioned in the through bore between the outer race of the bearing cartridge and a surface of the center housing where the surface defines at least part of the through bore of the center housing; and a shaft rotatably supported in the center housing by the bearing cartridge where the inner race is mounted on the shaft and the shaft is connected at one end to a compressor wheel and at another end to a turbine wheel.

Abstract: A rotating assembly for a turbocharger can include a center housing that includes a through bore having a central axis; a bearing cartridge positioned in the through bore where the bearing cartridge includes an outer race, an inner race and rolling elements disposed between the inner race and the outer race; an anisotropic member positioned in the through bore between the outer race of the bearing cartridge and a surface of the center housing where the surface defines at least part of the through bore of the center housing; and a shaft rotatably supported in the center housing by the bearing cartridge where the inner race is mounted on the shaft and the shaft is connected at one end to a compressor wheel and at another end to a turbine wheel.

Abstract: An exemplary anisotropic member supports a semi-floating bearing in a bore and can reduce non-synchronous vibration of the bearing in the bore. An anisotropic member can include an annular body configured to receive a semi-floating bearing and to space the bearing a distance from a bore surface and can be configured to impart anisotropic stiffness and damping terms to the semi-floating bearing when positioned in the bore. Such a member is suitable for use in a rotating assembly for a turbocharger where the bearing may be a semi-floating bearing. Various exemplary members, bearings, housings, assemblies, etc., are disclosed.

Abstract: An turbocharger assembly can include a compressor side ring disposed at least partially in a compressor side annular notch of a bearing, the ring in contact with a bore wall of a housing and the bearing to hinder axial flow of lubricant to a compressor end of the bearing and to reduce variation in a lubricant squeeze film thickness defined by and between the bearing and the bore wall and a turbine side ring disposed at least partially in a turbine side annular notch, the ring in contact with the bore wall and the bearing to hinder axial flow of lubricant to the turbine end of the bearing and to reduce variation in the lubricant squeeze film thickness. Various other springs, bearings, housings, assemblies, etc., are also disclosed.

Abstract: An turbocharger assembly can include a compressor side ring disposed at least partially in a compressor side annular notch of a bearing, the ring in contact with a bore wall of a housing and the bearing to hinder axial flow of lubricant to a compressor end of the bearing and to reduce variation in a lubricant squeeze film thickness defined by and between the bearing and the bore wall and a turbine side ring disposed at least partially in a turbine side annular notch, the ring in contact with the bore wall and the bearing to hinder axial flow of lubricant to the turbine end of the bearing and to reduce variation in the lubricant squeeze film thickness. Various other springs, bearings, housings, assemblies, etc., are also disclosed.

Abstract: An exemplary assembly includes a turbocharger center housing with a bore; a turbocharger bearing with an annular groove having a diameter; and a substantially planar spring, seated at least partially in the annular groove for positioning the turbocharger bearing in the bore of the housing, where the spring includes a first end and a second end, a free standing inner diameter, a plurality of straight sections tangent to the free standing inner diameter and disposed between the first end and the second end and a curved section disposed between two of the straight sections where the spring balances an inward radial bias with an outward radial bias to reduce contact between the bearing and the housing and variation in a squeeze film thickness. Various exemplary springs, bearings, housings, assemblies, etc., are also disclosed.

Abstract: An exemplary anisotropic member supports a semi-floating bearing in a bore and can reduce non-synchronous vibration of the bearing in the bore. An anisotropic member can include an annular body configured to receive a semi-floating bearing and to space the bearing a distance from a bore surface and can be configured to impart anisotropic stiffness and damping terms to the semi-floating bearing when positioned in the bore. Such a member is suitable for use in a rotating assembly for a turbocharger where the bearing may be a semi-floating bearing. Various exemplary members, bearings, housings, assemblies, etc., are disclosed.

Abstract: An exemplary anisotropic member (625, 1200, 1600, 1700, 1800, 1950) supports a bearing in a bore and can reduce non-synchronous vibration (NSV) of the bearing in the bore. An exemplary anisotropic member includes an annular body configured to receive a bearing and to space the bearing a distance from a bore surface and is configured to impart anisotropic stiffness and damping terms to the bearing when positioned in the bore. Such a member is suitable for use in a rotating assembly for a turbocharger where the bearing may be a floating bearing, a semi-floating bearing or a ball bearing. Various exemplary members, bearings, housings, assemblies, etc., are disclosed.

Abstract: An exemplary assembly includes a turbocharger center housing with a bore; a turbocharger bearing with an annular groove having a diameter; and a substantially planar spring, seated at least partially in the annular groove for positioning the turbocharger bearing in the bore of the housing, where the spring includes a first end and a second end, a free standing inner diameter, a plurality of straight sections tangent to the free standing inner diameter and disposed between the first end and the second end and a curved section disposed between two of the straight sections where the spring balances an inward radial bias with an outward radial bias to reduce contact between the bearing and the housing and variation in a squeeze film thickness. Various exemplary springs, bearings, housings, assemblies, etc., are also disclosed.

Abstract: An exemplary spring for positioning a turbocharger bearing in a housing includes a free standing inner diameter, a free standing outer diameter and a substantially sinusoidal shape to provide an inward radial bias and to provide an outward radial bias wherein the spring balances the inward radial bias with the outward radial bias to thereby position a turbocharger bearing in a housing. Various exemplary springs, bearings, housings, assemblies, etc., are also disclosed.

Abstract: An exemplary spring for positioning a turbocharger bearing in a housing includes a free standing inner diameter, a free standing outer diameter and a substantially sinusoidal shape to provide an inward radial bias and to provide an outward radial bias wherein the spring balances the inward radial bias with the outward radial bias to thereby position a turbocharger bearing in a housing. Various exemplary springs, bearings, housings, assemblies, etc., are also disclosed.

Abstract: An exemplary anisotropic member (625, 1200, 1600, 1700, 1800, 1950) supports a bearing in a bore and can reduce non-synchronous vibration (NSV) of the bearing in the bore. An exemplary anisotropic member includes an annular body configured to receive a bearing and to space the bearing a distance from a bore surface and is configured to impart anisotropic stiffness and damping terms to the bearing when positioned in the bore. Such a member is suitable for use in a rotating assembly for a turbocharger where the bearing may be a floating bearing, a semi-floating bearing or a ball bearing. Various exemplary members, bearings, housings, assemblies, etc., are disclosed.

Abstract: An apparatus and method for cooling components associated with turbomachinery by means of one or more venturis placed in the intake flow of air into the compressor with an air inlet upstream of the venturis and an air outlet integral to at least one venturi. The partial vacuum created from the one or more venturis draws air past components that are desired to be cooled.

Abstract: A turbocharger includes a compressor wheel and shaft assembly in which a threaded connection is provided between the shaft and the compressor wheel. A pair of pilot surfaces on the shaft and on the compressor wheel are located on either end of the threaded sections of the shaft and compressor wheel, and are displaced radially from the threads. Accordingly, the piloting functions which assure concentricity between the shaft and compressor wheel are kept entirely separate from the attachment function provided by the threads, thereby permitting the concentricity between the compressor wheel and shaft to be held to tighter tolerances than would be possible if the threads also performed a piloting function.