Patent ID: 6925982
Filing Date: 2005-08-09
Classification: F01N,F02D,Y02T

Abstract:
1. A system comprising: an engine having a first and second bank, and a first group of cylinders and a second group of cylinders, with said first group having at least one cylinder from the first bank and one cylinder from the second bank, and said second group having a least one cylinder from the first bank and one cylinder from the second bank; an exhaust manifold coupled to said first and second group of cylinders; an emission control device coupled to said exhaust manifold, said device storing oxidants during lean operation and reacting said stored oxidants during stoichiometric or rich operation; a controller that operates the engine in a first mode where the first group of cylinders operates with substantially no injected fuel and the second group operates combusting a air-fuel mixture, and during said first mode, periodically operates both the first and second groups to combust a stoichiometric or rich air-fuel ratio.