Turbocharger bearing housing oil groove

摘要

A turbocharger for an internal combustion engine includes a bearing housing and a bearing bore defined by the bearing housing. The bearing bore has an annular bearing groove configured to receive a fluid. A journal bearing is disposed within the bore such that the annular bearing groove encircles the journal bearing and feeds the fluid thereto. The turbocharger also includes a rotating assembly having a shaft with a turbine wheel and a compressor wheel. The shaft has a longitudinal axis and is supported by the journal bearing for rotation within the bore about the axis. The annular bearing groove is characterized by a trapezoidal shape in a cross-sectional view of the bearing bore taken along and through the longitudinal axis. The trapezoidal shape is configured to generate Taylor vortices in the fluid for capturing debris carried by the fluid and keeping the debris from being fed to the journal bearing.

主权项

1. An internal combustion engine comprising:
an engine block defining a combustion chamber configured to receive an air-fuel mixture for combustion therein and configured to exhaust post-combustion gasses therefrom; and a turbocharger configured to receive an airflow from an ambient and the post-combustion gasses from the combustion chamber, the turbocharger including:
a bearing housing;a bearing bore defined by the bearing housing and having an annular bearing groove configured to receive a fluid;a journal bearing disposed within the bearing bore such that the annular bearing groove encircles the journal bearing and feeds the fluid thereto; anda rotating assembly having a shaft with a turbine wheel configured to be driven by the post-combustion gasses and a compressor wheel configured to pressurize the airflow for delivery to the combustion chamber;wherein:
the journal bearing includes a first surface defined by an inner diameter, a second surface defined by an outer diameter, and a passage that connects the first and second surfaces;the shaft has a longitudinal axis and is supported by the journal bearing for rotation within the bearing bore about the longitudinal axis;the annular bearing groove is characterized by a trapezoidal shape in a cross-sectional view of the bearing bore taken along and through the longitudinal axis and positioned to align with and feed the fluid through the passage; andthe trapezoidal shape is configured to generate Taylor vortices in the fluid for capturing debris carried by the fluid and keeping the debris from being fed to the journal bearing.