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Methods and Systems for Variable Displacement Engine Control

  • US 20110265454A1
  • Filed: 05/12/2011
  • Published: 11/03/2011
  • Est. Priority Date: 05/12/2011
  • Status: Active Grant
First Claim
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1. A method of operating an engine including a first and second cylinder group, comprising,selecting either the first or second cylinder group for deactivation;

  • andclosing a valve coupled between the selected cylinder group and a downstream catalyst based on the selection.

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