Patent ID: 9388707
Filing Date: 2016-07-12
CPC Classification: F01D,F05D

Claim Text:
1. A passive flow control device for a passively-controlled turbocharger, the passive flow control device comprising a variably restricting flow restrictor for restricting flow in a turbocharger inlet by a variable amount, the flow restrictor positioned at least partially within a volute of the passively-controlled turbocharger and comprising a plurality of vanes pivotable between a plurality of flow restrictor positions around an axial direction, the passive flow control device being arranged such that the flow restrictor position varies flow restriction in response to force acting on a surface of the plurality of vanes caused by a pressure pulse in a flow direction, a biasing component arranged to bias the plurality of vanes in a bias direction opposed to the flow direction, and a damper arranged to dampen the force acting on the flow restrictor, the biasing component and the damper arranged to cause opening of the flow restrictor during the peak of the pressure pulse and closing of the flow restrictor during a trough of the pressure pulse.