Patent ID: 7946118
Filing Date: 2011-05-24
Classification: F01M,F01P,F02B,F02C,F05D,Y02T

Abstract:
1. A method of cooling the stator component of an electric motor in an electrically controlled turbocharger, comprising the steps of: providing a housing structured to support a main shaft for rotation and to separately contain components of a turbine, said electric motor and a compressor; mounting said shaft on bearings at either end of said housing that contains said electric motor components to result in said shaft supporting for rotation therewith a turbine blade, and electric motor rotor and a compressor blade; forming oil lubrication passages in said housing for receiving lubricating oil from a separate source and for directing oil to each of said bearings; providing an oil cooling gallery in said housing in communication with said stator component of said electric motor; providing a pressure reduction valve between said passages and said oil cooling gallery to pass oil from said separate source at a relatively reduced pressure to said oil cooling gallery and to provide said oil directly to said stator component to effect cooling thereof; and providing said oil gallery with an apertured wall adjacent said stator component and spraying said oil directly onto said stator component.