Cooling an Electrically Controlled Turbocharger
First Claim
1. An electrically controlled turbocharger comprising a turbine, a compressor and an electric motor, a housing and a main shaft;
- said housing structured to support said main shaft for rotation and to separately contain components of said turbine, said electric motor and said compressor;
said shaft being mounted on bearings at either end of said housing that contains said electric motor components and;
said shaft supports for rotation therewith a turbine blade, and electric motor rotor and a compressor blade;
said housing is formed to contain oil lubrication passages which receive lubricating oil from a separate source and direct oil to each of said bearings;
said housing contains an oil cooling gallery adjacent the stator component of said electric motor;
said oil cooling gallery is in communication with said passages through a pressure reduction valve to receive oil from said passages at a relatively reduced pressure and to provide said oil directly to said stator component to effect cooling thereof.
6 Assignments
0 Petitions
Accused Products
Abstract
An electrically controlled turbocharger has a motor mounted on a shaft in a motor housing between a turbine and compressor. Oil is sprayed onto the motor stator to cool the stator. An oil gallery is disposed above the stator to receive lubricating oil and contains apertures that perform as jets to allow oil to be sprayed directly on the motor stator. A coolant jacket is formed in the turbocharger housing between the turbine and the motor to allow liquid coolant to circulate therein and dissipate heat from the turbine end prior to reaching the motor components. Other embodiments provide for a stator component to be submerged in flowing cooling oil.
90 Citations
21 Claims
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1. An electrically controlled turbocharger comprising a turbine, a compressor and an electric motor, a housing and a main shaft;
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said housing structured to support said main shaft for rotation and to separately contain components of said turbine, said electric motor and said compressor; said shaft being mounted on bearings at either end of said housing that contains said electric motor components and; said shaft supports for rotation therewith a turbine blade, and electric motor rotor and a compressor blade; said housing is formed to contain oil lubrication passages which receive lubricating oil from a separate source and direct oil to each of said bearings; said housing contains an oil cooling gallery adjacent the stator component of said electric motor; said oil cooling gallery is in communication with said passages through a pressure reduction valve to receive oil from said passages at a relatively reduced pressure and to provide said oil directly to said stator component to effect cooling thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electrically controlled turbocharger comprising a turbine, a compressor and an electric motor, a housing and a main shaft;
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said housing structured to support said main shaft for rotation and to separately contain components of said turbine, said electric motor and said compressor; said shaft being mounted on bearings at either end of said housing that contains said electric motor components and; said shaft supports, for rotation therewith, a turbine blade, an electric motor rotor and a compressor blade; said housing is formed to contain a cooling jacket to surround the bearing located between said turbine and said motor and located within a heat conduction path existing in said housing between said turbine and said motor; said cooling jacket configured to receive coolant liquid from an external source and to pass said coolant back to said source; said housing further containing oil lubrication passages to supply lubricating oil from an external source to each of said bearings, a sump for receiving excess oil as it flows through said bearings and a drain for allowing said excess oil to be removed from said housing; said housing contains an oil chamber in communication between said lubrication passages and the stator component of said electric motor to supply lubricating oil directly onto said stator component. - View Dependent Claims (8)
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9. An electrically controlled turbocharger comprising a turbine, a compressor and an electric motor, a housing and a main shaft;
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said housing structured to support said main shaft for rotation and to have portions which separately contain components of said turbine, said electric motor and said compressor; said shaft being mounted on bearings at either end of said housing portion that contains said electric motor components and; said shaft supports a turbine blade, an electric motor rotor and a compressor blade for rotation therewith; said housing is formed to contain oil lubrication passages which receive lubricating oil from a separate source of oil and direct oil to each of said bearings; said housing contains an oil cooling gallery adjacent the stator component of said electric motor; said oil cooling gallery being in communication with said passages through a pressure reduction valve to receive oil from said source of oil at a relatively reduced pressure and to direct said oil onto said stator component. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of cooling the stator component of an electric motor in an electrically controlled turbocharger, comprising the steps of:
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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. - View Dependent Claims (18, 19, 20, 21)
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Specification