Patent ID: 7240483
Filing Date: 2007-07-10
Classification: F01N,F02D,F23G,Y02T

Abstract:
1. A system comprising: an engine operative to produce exhaust; a fuel injector configured to inject fuel into a stream of the exhaust from the engine; a pre-combustor comprising an oxidation catalyst and configured to receive the exhaust stream together with fuel injected by the fuel injector; a fuel combustor comprising a fuel reforming catalyst and configured to receive the exhaust stream from the pre-combustor; a lean NOx trap configured to receive the exhaust stream from the fuel combustor; wherein the pre-combustor is operative to combust a first portion of the injected fuel and to vaporize another portion of the injected fuel; the fuel combustor is operative to form an effective amount of H the lean NOx trap is functional to adsorb and store NOx from the exhaust stream when the exhaust stream is overall lean and to reduce and release stored NOx when the exhaust stream is overall rich.