Borgwarner Inc.

Andrew Richardson

Andrew John Taylor

James Mawer

Steve Birnie

Sanjit Chaggar

Malcolm Carr

Simon Slater

A method of assembling and retaining a noise attenuation device () within an air inlet () of a compressor cover () includes inserting the noise attenuation device () into the air inlet () and applying a rolling compressive force to the air inlet () using a forming tool (). As a result, the air inlet terminal end () is deformed radially inward so as to form a radially-inwardly protruding lip (b) about the air inlet terminal end (). The radially-inwardly protruding lip () is configured to retain the noise attenuation device () within the air inlet (). The forming tool () used to form the radially-inwardly protruding lip () is also described.

Compressor cover assembly method and forming tool

A product is disclosed for inhibiting oil from entering a turbocharger compressor. A compressor wheel may be disposed in a wheel chamber of a housing to rotate at a range of speeds. The compressor wheel may be surrounded by a collection volute with a diffuser channeling air from the wheel chamber to the collection volute. A shaft may extend through the housing and may be connected to the compressor wheel. The shaft may be supported by a bearing that may be lubricated through an oil circuit. A pressure differential between the wheel chamber and the oil circuit inhibits oil from entering the wheel chamber. The pressure differential may be maintained during rotation of the compressor wheel at a low end of the range of speeds by a collar disposed near a tip of the compressor wheel at an entrance to the diffuser.

Turbocharger compressor active diffuser

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Huddersfield, United Kingdom

Andrew Richardson