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Twin scroll turbocharger with EGR takeoffs

  • US 9,506,396 B2
  • Filed: 09/10/2015
  • Issued: 11/29/2016
  • Est. Priority Date: 06/14/2010
  • Status: Active Grant
First Claim
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1. A turbocharged in-line engine system comprising:

  • a first scroll and a second scroll fluidically coupled to a turbine, the first scroll coupled to a first set of inner engine cylinders, the second scroll coupled to a second set of outer engine cylinders;

    a first EGR takeoff including a first valve, the first EGR takeoff fluidically coupled to the first scroll;

    a second EGR takeoff including a second valve, the second EGR takeoff fluidically coupled to the second scroll, the first and second valves coupled in a common housing, the first and second valves being dual butterfly valves where the dual butterfly valves are coupled to a common rotating shaft;

    a turbine wastegate coupled around the turbine; and

    an EGR conduit coupled to the first and second EGR takeoffs.

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