Borgwarner Inc.

Matthew Carson Colley

Dominic William DePaoli

Sean N Hastings

Craig Andrew Colont

Greg Williams

A variable turbine geometry assembly for controlling flow of exhaust gas to a turbine wheel of a turbocharger includes an adjustment ring extending about an axis and rotatable about the axis, at least one vane lever coupled to the adjustment ring, and at least one vane coupled to the at least one vane lever. The at least one vane is moveable with respect to the adjustment ring when the adjustment ring rotates about the axis. The variable turbine geometry assembly further includes a wave spring operably in contact with at least one of the at least one vane lever and the adjustment ring. The wave spring is configured to bias one of the at least one vane lever and the adjustment ring toward the other of the at least one vane lever and the adjustment ring.

Variable turbine geometry assembly

High cycle fatigue (HCF) in a turbine wheel of a sector-divided dual volute turbocharger, particularly a turbocharger where the tongue-to-blade gap is as small as from 1-3% of the wheel diameter, is reduced, and energy extraction is optimized, using a turbine wheel with (blade stiffness/backwall stiffness&#xd7;100) between 41 and 44.

Method of reducing turbine wheel high cycle fatigue in sector-divided dual volute turbochargers

A wastegate assembly for a turbocharger includes a valve element having a valve body and a shaft extending away from the valve body. A spindle is coupled to the shaft for moving the valve element between a first and a second position to control the flow of exhaust gas to a turbine housing interior of the turbocharger. A washer is coupled to the shaft such that the spindle is disposed between the valve body and the washer for retaining the spindle to the shaft. A biasing member is disposed between the spindle and the washer, has a trough portion extending toward the spindle, and has a crest portion extending toward the washer. At least one of the spindle and the washer define a seating groove and the biasing member extends at least partially into the seating groove to seat and prevent rotation of the biasing member.

Wastegate assembly and turbocharger including the same

High cycle fatigue (HCF) in a turbine wheel of a sector-divided dual volute turbocharger, particularly a turbocharger where the tongue-to-blade gap is as small as from 1-3% of the wheel diameter, is reduced using a turbine wheel with (blade stiffness/backwall stiffness&#xd7;100) between 41 and 44.

Growing community of inventors

Arden, NC, United States of America

Matthew Carson Colley