Borgwarner Inc.

Robert Thomas Race

Erwin Perry Ellwood, Iii

Jonathan Reid Williams

Jason W Chekansky

Allan Douglas Kelly

Augustine Cavagnaro

Zachary Ashton

Raj Chandramohanan

E Perry Ellwood

Erwin Perry Ellwood Iii

A bearing housing for a turbocharger is disclosed. The bearing housing includes a first end proximate to a turbine wheel of the turbocharger and a second end proximate to a compressor wheel of the turbocharger. The bearing housing further includes a central chamber disposed between the first end and the second end and configured to house, at least, the shaft. The bearing housing further includes an oil drain disposed radially outward of the shaft and configured for directing oil out of the bearing housing and an oil core disposed radially outward of the shaft and radially inward of the oil drain, the oil core configured for communicating oil towards the oil drain and having an inner wall. The bearing housing includes one or more strakes protruding radially inward from the inner wall, the one or more strakes configured to direct oil within the oil core towards the oil drain.

Flow strakes for turbocharger bearing housing oil core

In a turbocharger for receiving exhaust gas from an internal combustion engine and for delivering compressed air to the internal combustion engine, a backplate may include a lubricant stall protrusion, such as a rib, may be placed in recirculation or collection recesses of the backplate to stall recirculating lubricant flow and direct the lubricant into a bearing housing lubricant core and drain to reduce an amount of lubricant proximate piston rings and leaking into a compressor housing of the turbocharger. When an lubricant deflector is used, the lubricant stall protrusion stalls recirculating lubricant that is outboard of the lubricant deflector, and may have an outer protrusion edge closely matching the outboard contour of the lubricant deflector to minimize a flow gap there between.

Recirculation stall in compressor insert or backplate

A heat shield () and method for assembling such is disclosed. The heat shield () may comprise an outer wall () and an inner wall (). The outer wall () includes a first member (), a flange () extending outward from the first member () and a first inner edge (). The first member () extends from the flange () to the first inner edge (). The inner wall () includes a second member (), a rim () extending outward from the second member () and a second inner edge (). The second member () extends from the rim () to the second inner edge (). The inner wall () is spaced apart from the outer wall (), the first and second edges form an air gap () between them, and the inner wall () and the outer wall () form a cavity ().

Heat shield

A turbocharger rotating assembly () includes a shaft () rotatably supported in a bearing housing () via bearings (), a compressor impeller () mounted on the shaft (), and an oil flinger () disposed on the shaft () between the bearings () and the compressor impeller (). The turbocharger () further includes an insert () disposed in the shaft-receiving axial bore () so as to surround the oil flinger (), and a purge seal () operatively positioned in an interface () between the insert () and the oil flinger (), whereby the purge seal () is configured to minimize oil passage from the bearing housing () into the interface (). An annular cavity () encircles the radially outward-facing surface () of the insert (), the cavity () forming a portion of a fluid path configured to deliver pressurized fluid to the interface ().

Turbocharger purge seal including axisymmetric supply cavity

A venting system for a turbocharger may include a bearing housing. The bearing housing may include an inner member. A housing wall may extend from the inner member and may include at least one vent disposed therethrough. A partition may be sealed to the housing wall and the inner member. The partition, the housing wall, and the inner member may collectively form a thermal dam.

Venting system for a bearing housing thermal dam of a turbocharger

A rotor assembly () is provided for a switched reluctance motor () in which nonmetallic, nonconductive pins () pass through a stack () of magnetic laminate plates ().

High speed switch reluctance motor on a turbocharger

A bearing housing () for a turbocharger () includes a split () defining a first bearing housing segment () and a second bearing housing segment (). At least one channel () for transporting fluid within the bearing housing () crosses the split () such that the channel () extends within the first bearing housing segment () and the second bearing housing segment (). A dowel () having a hollow interior is inserted in the channel () to align the first and second bearing housing segments () and allows fluid to flow through the channel ().

Growing community of inventors

Arden, NC, United States of America

Robert Thomas Race