Abstract: A turbocharger includes a turbine and compressor housing attached by a circumferential clamp with circumferentially staggered contact points between the clamp and the housings to reduce heat transfer from the turbine housing to the compressor housing. The mass of the turbine housing is reduced and the mass of the compressor housing is increased to reduce the transfer of heat from the turbine housing to the compressor housing from the thermal flux of the turbine side heat energy. The compressor housing mass is increased by incorporating a heat-transfer interface between the compressor housing and the oil reservoir cover, which oil reservoir extends circumferentially around the axis of the turbocharger rotor shaft. Concentricity between the components of the turbocharger is achieved by creating the radial junction between the turbine and compressor backwalls on the smallest feasible diameter to minimize the effects of thermally induced distortion on component concentricity.

Abstract: A device for generating rotating shaft power from atmospheric air includes an airfoil. A partition is disposed within the airfoil along the length thereof. The partition forms an upper chamber and a lower chamber within the airfoil. The partition includes an aperture creating a fluid communication path between the upper and lower chambers. The leading edge of the airfoil includes an aperture disposed adjacent to the lower chamber. The top surface of the airfoil includes an aperture disposed adjacent to the upper chamber. A turbine is disposed within the partition aperture, and is adapted to be driven by fluid pressure entering the leading edge aperture of the airfoil and exiting the top surface aperture of the airfoil.

Abstract: A turbocharger compressor housing unit includes an outer housing and a wall insert for engagement with the outer housing. The outer housing has a compressor inlet port, a wall transverse to the inlet port and extending outwardly therefrom and a circumferential chamber attached to the transverse wall spaced from the inlet port. The chamber has an opening substantially in the plane of the transverse wall. The wall insert is formed with a tubular throat having a disc attached at one end of the tubular throat transverse thereto. The disc has an aperture corresponding to an opening defined through the throat. Rivet protrusions are integrally formed and extend from the disc and correspond to apertures in the transverse wall of the compressor housing. The rivet protrusions engage the apertures in the transverse wall to join the insert to the outer housing with the disc in engagement with the transverse wall. The disc partially encloses the opening in the plane of the wall of the circumferential chamber.

Abstract: The invention provides a turbocharger (20), compressor (170) and turbine (172) rotors mounted on a shaft (160) supported by ball bearing assemblies (162, 164) such that the compressor rotor (172) and turbine rotor (170) are overhung to one side of the bearing assemblies with the turbine rotor separated from the bearing assemblies by the compressor rotor. The turbocharger (20) includes a turbine nozzle area (230) having a plurality of nozzle vanes (234) spaced circumferentially about the turbine rotor and in the nozzle area through which exhaust air from the engine is received into the turbine. A control linkage (228) is positioned intermediate of the compressor rotor and turbine rotor and controls the position of the nozzle vanes to vary the flow of exhaust gases to the tubine rotor. A concentrically positioned cylindrical module (60) is supported within the compressor inlet by struts (62) extending from the inlet wall (64) to the module (60) thereby dividing the inlet into more than one inlet passage.

Abstract: A retainer for securing the compressor rotor (172) to the compressor-turbine shaft (160) of a turbocharger includes a retaining sleeve (180) having an aperture therethrough for mounting the sleeve onto the shaft adjacent the compressor rotor to prevent movement of the rotor on the shaft in the direction of the sleeve. The sleeve has an inner bore (180a) having a diameter forming an interference fit on the shaft such that the sleeve prevents movement of the compressor rotor on the shaft. In one embodiment, a lug (300) extends from the sleeve (180) and engages the compressor rotor to transmit a rotational force from the shaft to the rotor through the sleeve and lug.

Abstract: The invention provides a turbocharger for use with an internal combustion engine and includes a compressor for supplying air to the engine and a turbine for receiving driving exhaust gas from the engine. The turbine has a shaft integrally attached thereto with which the turbine rotates. The compressor is fitted on the turbine shaft for rotation with the turbine. The shaft is rotatively supported by ball bearing assemblies such that the compressor and turbine are overhung to one side of the bearing assemblies with the turbine separated from the bearing assemblies by the compressor. As a result of this arrangement, the bearing assemblies are removed from the turbine and the intense heat to which the turbine is subjected. This makes possible the use of limited lubrication for the bearing assemblies. The use of ball bearings also provides better control over the radial and axial movement of the turbine and compressor and permits reduced blade tip clearances.