×

System and Methods for Skip Fire Engine with a Lean NOx Trap

  • US 20120042633A1
  • Filed: 08/18/2011
  • Published: 02/23/2012
  • Est. Priority Date: 08/20/2010
  • Status: Abandoned Application
First Claim
Patent Images

1. A method for operating a spark ignition internal combustion engine, wherein the internal combustion engine includes a plurality of cylinders, each of the plurality of cylinders being capable of operating in a succession of combustion cycles, the method comprising:

  • substantially regulating the control of fuel to and firing an activated subset of the plurality of cylinders according to a firing pattern;

    substantially deactivating the fueling and firing of a deactivated subset of the plurality of cylinders;

    channeling exhaust emissions from at least one of the cylinders of the deactivated subset of the plurality of cylinders and at least one of the activated subset of the plurality of cylinders through a lean NOx trap, wherein the lean NOx trap chemically absorbs NOx emissions within the exhaust emissions; and

    regenerating the lean NOx trap in accordance to an NOx regeneration protocol.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×