×

System for emission device control with cylinder deactivation

  • US 20050193719A1
  • Filed: 03/05/2004
  • Published: 09/08/2005
  • Est. Priority Date: 03/05/2004
  • Status: Active Grant
First Claim
Patent Images

1. A method for controlling an engine with first and second set of cylinder, where the first set is coupled to a first upstream emission control device, the method comprising:

  • operating in a first mode with the first set of cylinder combusting an air-fuel mixture that oscillates about stoichiometry and second set of second set of cylinders pumping air without injected fuel; and

    after said first mode, operating in a second mode with both sets of cylinders combusting, where the first set of cylinders continues combustion that oscillates about stoichiometry and the second set combusts a rich air-fuel mixture for at least a selected duration, and then combusts an air-fuel mixture that oscillates about stoichiometry.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×