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Variable valvetrain turbocharged engine

  • US 8,833,058 B2
  • Filed: 04/16/2012
  • Issued: 09/16/2014
  • Est. Priority Date: 04/16/2012
  • Status: Active Grant
First Claim
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1. An engine system comprising:

  • a first cylinder including two exhaust ports coupled to a turbocharger via an integrated exhaust manifold;

    a second cylinder including a first exhaust port coupled to the turbocharger via the integrated exhaust manifold and a second exhaust port coupled to a catalyst and not the turbocharger; and

    a system including a camshaft with profiles and configured to;

    only allow the second exhaust port to open during a first condition, andallow each exhaust port to open during a second condition.

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