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US 10,590,946 B2Granted
Turbocharger having thrust bearing with biased oil flow
AssigneeBorgWarner Inc.
InventorAndrew Day
Life of this patent
Estimating the term…
Abstract
A turbocharger includes a turbine wheel, a compressor wheel, a shaft coupled to the turbine wheel and the compressor wheel, and a thrust bearing. The thrust bearing includes a loaded side and an unloaded side. The loaded side bears a majority of axial loading caused by force imbalances between the turbine wheel and the compressor wheel during engine startup. The thrust bearing restricts oil flow to the unloaded side as compared to the loaded side during engine startup.
Claims14
A turbocharger comprising:
- a turbine wheel, a compressor wheel, and a shaft coupled to the turbine wheel and the compressor wheel;
- and
- a thrust bearing having a loaded side and an unloaded side, the loaded side bearing a majority of axial loading caused by force imbalances between the turbine wheel and the compressor wheel during engine startup, wherein the thrust bearing restricts oil flow to the unloaded side as compared to the loaded side during engine startup wherein the thrust bearing includes an oil inlet, one or more loaded side outlets, a loaded side circumferential channel configured to distribute oil from the oil inlet to the loaded side outlets, one or more unloaded side outlets, and an unloaded side circumferential channel configured to distribute oil from the oil inlet to the unloaded side outlets, wherein the unloaded side circumferential channel is a flow restricting channel.
Dependencies are inferred from the claim text.