Abstract: A forced induction device for an internal combustion engine is provided, which includes a shaft, and a compressor wheel that is threadably mounted to the shaft, and a tool that is configured to engage one or more through bores in the compressor wheel to thread and unthread the compressor wheel onto and off of the shaft. The compressor wheel has a plurality of blades with leading edges that converge at an apex. The apex is aligned with a centerline of the shaft. The tool allows a technician to rotate the compressor wheel relative to the shaft to install or remove the compressor wheel from the shaft without applying any pressure to the blades of the compressor wheel. An associated assembly method is also provided.

Abstract: A turbocharger assembly including a housing, a shaft, and turbine and compressor wheels mounted on opposite ends of the shaft. The shaft is rotatably supported within the housing by a bearing cartridge that includes turbine-side and compressor side ball-bearing assemblies that are longitudinally spaced by a spacer. There are two times as many rows of ball-bearings included in the turbine-side ball-bearing assembly compared to the compressor-side ball-bearing assembly. The spacer slides over and rotates with the shaft and has at least one flat. An optical sensor extends through the housing and an optical sensor opening in the bearing cartridge to prevent the bearing cartridge from rotating within the housing. The optical sensor detects rotational speed of the spacer by counting the number of times the flat(s) passes by the optical sensor during a pre-determined time interval.

Abstract: A forced induction device for an internal combustion engine is provided, which includes a shaft, and a compressor wheel that is threadably mounted to the shaft, and a tool that is configured to engage one or more through bores in the compressor wheel to thread and unthread the compressor wheel onto and off of the shaft. The compressor wheel has a plurality of blades with leading edges that converge at an apex. The apex is aligned with a centerline of the shaft. The tool allows a technician to rotate the compressor wheel relative to the shaft to install or remove the compressor wheel from the shaft without applying any pressure to the blades of the compressor wheel. An associated assembly method is also provided.

Abstract: A turbocharger for an internal combustion engine is provided, where the turbocharger includes a housing, a shaft, a turbine wheel, and a compressor wheel. The shaft is rotatable with respect to the housing and defines a centerline. The turbine wheel is mounted to the shaft and is disposed within the housing. The compressor wheel is threadably mounted to the shaft and is disposed within the housing. The turbine wheel and/or the compressor wheel has a plurality of blades with leading edges that converge at an apex. The apex is aligned with the centerline. A temporary fixation mechanism allows a technician to temporarily lock rotation of the compressor wheel relative to the housing to install or remove the compressor wheel from the shaft. A method of constructing a turbocharger is also provided.

Abstract: A turbocharger for an internal combustion engine is provided, where the turbocharger includes a housing, a shaft, a turbine wheel, and a compressor wheel. The shaft is rotatable with respect to the housing and defines a centerline. The turbine wheel is mounted to the shaft and is disposed within the housing. The compressor wheel is also mounted to the shaft and is disposed within the housing. The turbine wheel and/or the compressor wheel has a plurality of blades with leading edges that converge at an apex. The apex is aligned with the centerline. A method of constructing a turbocharger is also provided, where the method includes the step of performing a finishing operation on the turbine wheel and/or the compressor wheel to form an apex where the leading edges of the blades converge.

Abstract: A turbocharger for an internal combustion engine is provided, where the turbocharger includes a housing, a shaft, a turbine wheel, and a compressor wheel. The shaft is rotatable with respect to the housing and defines a centerline. The turbine wheel is mounted to the shaft and is disposed within the housing. The compressor wheel is threadably mounted to the shaft and is disposed within the housing. The turbine wheel and/or the compressor wheel has a plurality of blades with leading edges that converge at an apex. The apex is aligned with the centerline. A temporary fixation mechanism allows a technician to temporarily lock rotation of the compressor wheel relative to the housing to install or remove the compressor wheel from the shaft. A method of constructing a turbocharger is also provided.

Abstract: A turbocharger for an internal combustion engine is provided, where the turbocharger includes a housing, a shaft, a turbine wheel, and a compressor wheel. The shaft is rotatable with respect to the housing and defines a centerline. The turbine wheel is mounted to the shaft and is disposed within the housing. The compressor wheel is also mounted to the shaft and is disposed within the housing. The turbine wheel and/or the compressor wheel has a plurality of blades with leading edges that converge at an apex. The apex is aligned with the centerline. A method of constructing a turbocharger is also provided, where the method includes the step of performing a finishing operation on the turbine wheel and/or the compressor wheel to form an apex where the leading edges of the blades converge.