Borgwarner Inc.

Mike Ausbrooks

Brock Fraser

Thomas A Grissom

A product for use in a turbocharger system. A turbine housing may define a center core that is circular in shape with a circumference. The turbine housing may define a first volute that extends for a length around only a part of the circumference of the center core, and a second volute that may be positioned radially outside the first volute and that may extend entirely around the circumference of the center core. The first volute and the second volute may define first and second exhaust gas passages through the turbine housing that may be asymmetric. All points of the second volute may be radially outside the first volute from the center core over the entire length of the first volute.

Dual volute turbocharger to optimize pulse energy separation for fuel economy and EGR utilization via asymmetric dual volutes

A turbocharger with a turbine () having a turbine wheel () in a turbine housing () with an associated manifold () having individual ports () corresponding to unobstructed passageways () from each cylinder of an engine. The ports () are substantially equally spaced around a face of the turbine wheel () to preserve benefits of pulses without interference.

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Candler, NC, United States of America

Mike Ausbrooks