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Simplified variable geometry turbocharger with sliding gate and multiple volutes

  • US 8,585,355 B2
  • Filed: 04/13/2010
  • Issued: 11/19/2013
  • Est. Priority Date: 04/20/2009
  • Status: Active Grant
First Claim
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1. A variable geometry turbocharger turbine housing comprising:

  • an exhaust gas inlet (51);

    a volute for channeling exhaust gas from said exhaust gas inlet and defined in part by a radially outer volute wall;

    a turbine wheel chamber adapted for enveloping a turbine wheel (70) mounted for rotation about an axis;

    a vortex zone in which exhaust gas transitions from the volute to the turbine wheel;

    an exhaust gas outlet (52);

    at least first and second divider walls (58, 59;

    58

    , 59

    ), generally parallel to the axis of the turbine wheel, dividing the volute into at least first, second and third volute portions, said first and second divider walls each having a plurality of communicating openings (82, 83), said first and second divider walls each having an upstream end and a downstream end; and

    a sliding gate valve (80), adapted to being moved between positions, wherein in at least one of the positions the sliding gate valve blocks exhaust gas flow to at least one of the volute portions,wherein each volute portion channels exhaust gas to a different circumferential area of the vortex zone.

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