Borgwarner Inc.

Vahidin Alajbegovic

Daniel N Ward

John P Watson

Gordon Clark Jenks

Daniel J Van Saun

Abraham C Narehood

Robert S Lerosen

A variable-geometry turbocharger () with a vane lever () that provides a stop function at full open position of the guide vanes (). The integrated vane-open stop controls the full open position of the VTG mechanism. A vane lever () preferably has an integrated protrusion () that functions as a vane-open stop that contacts an adjacent vane lever (), an integrated bolt (), or the upper vane ring () at the full open position to regulate maximum exhaust gas flow to the turbine wheel ().

Integrated vane stops for variable-geometry turbocharger mechanism

The life of an actuator such as a turbocharger VTG actuator is extended by reducing heat conduction from the turbine housing along the control linkage to the actuator link and into the actuator, thereby protecting sensitive electronic components. To this end, the control linkage may be made of a thermal energy retarding material in order to retard heat from the turbine housing assembly reaching the actuator.

Turbocharger control linkage with reduced heat flow

Implementations of the present disclosure are directed to turbine assemblies for turbocharger systems. In some implementations, turbine housings include a body that defines an inlet for fluid communication with a fluid source, and a wall, the wall dividing the inlet into an inner inlet and an outer inlet, and a fluid guide assembly disposed within the housing, the fluid guide assembly including a plurality of vanes that demarcate an inner volute and an outer volute within the housing, the inner volute being in fluid communication with the inner inlet and the outer volute being in fluid communication with the outer inlet, each vane of the plurality of vanes being fixed at a respective angle relative to a radial direction, the plurality of vanes guiding fluid flow from the outer volute to the inner volute.

Double flow turbine housing turbocharger

The life of an actuator such as a turbocharger VTG actuator is extended by reducing heat conduction from the turbine housing along the control linkage to the actuator link and into the actuator, thereby protecting sensitive electronic components. To this end, the control linkage may be equipped with cooling fins, or be made hollow rather than solid, or be made of a thermal energy retarding material in order to retard heat from the turbine housing assembly reaching the actuator.

The flow path of exhaust gas to the turbine wheel () of a turbocharger is influenced by relative motion between two rings of vanes, at least one of which being provided on a vane ring. The outer ring of vanes contains a plurality of vanes (), the inner ring of vanes contains a plurality of vanes (), and the inner and outer vanes in registry forming a single generic vane shape. The aerodynamic effect of relative displacement of the outer ring of vanes to the inner ring of vanes produces a modulate-able control of exhaust flow to the turbine wheel.

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Arden, NC, United States of America

Vahidin Alajbegovic