Imperial Innovations Limited

Brunel University London

Apostolos Pesiridis

Ricardo Martinez-Botas

Harminder Flora

Srithar Rajoo

Colin Copeland

Srithar Imperial Innovations Ltd Electrical And Electronic Engineering Bldg Rajoo

A variable flow-restricting turbine assembly for a turbocharger includes a housing, a turbine mounted for rotation in the housing, and a variable flow-restrictor. The variable flow-restrictor includes a first series of angularly-distributed flow-restrictor portions distributed around the turbine wheel and located in an exhaust flow path to the wheel, and a second series of angularly-distributed flow-restrictor portions distributed around the first series and located in the exhaust path. At least one of the first and second series is rotatable in the housing to vary the relative angular positions of the first and second series. The restrictor portions are arranged such that the first portions align with the second portions at each of a plurality of relative angular positions to open flow channels between the portions and such that they misalign between those positions to close the flow channels.

Variable flow-restricting turbine assembly for a turbocharger, corresponding turbocharger engine and vehicle, and operating method

A flow control device for a turbocharger, the flow control device comprising a variably restricting flow restrictor for restricting flow in a turbocharger inlet by a variable amount, the flow control device being arranged such that the flow restrictor position varies flow restriction in response to force acting on a surface of the flow restrictor caused by a pressure pulse in a flow direction, the flow restrictor being biased in a direction opposed to the flow direction.

Passively controlled turbocharger

A flow control device for a turbocharger () includes a flow restrictor () with a variable position for variably restricting flow in a turbocharger inlet. A controller () controls the position of the flow restrictor based on sensed pressure () in the turbocharger inlet ().

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Apostolos Pesiridis