Bearing system for turbocharger

摘要

A thrust bearing for a turbocharger includes a main body portion which defines a central bore for receipt of a thrust collar, an oil reservoir in the shape of a blind, oblong slot disposed in the main body portion and an oil passageway connecting the oil reservoir with the central bore. As oil is drained from the turbocharger by a siphoning action as the engine oil level drops, oil which is stored in the oil reservoir will remain and after the engine has completely stopped this stored oil is available to drain into the interface between the thrust collar and central bore of the thrust bearing in order to provide lubricating oil to this interface upon restart of the engine. Oil is also provided by the reservoir to the turbine and compressor journal bearings where it is held in small clearances on the inner and outer surfaces of the journal bearings.