Patent ID: 6955042
Filing Date: 2005-10-18
Classification: F01N,Y02A,Y02T

Abstract:
1. Apparatus for reducing oxides of nitrogen in the exhaust of an internal combustion engine, comprising: an exhaust pipe for containing a stream of engine exhaust; at least one lean NOx trap; an inlet manifold extending between said exhaust pipe and said at least one lean NOx trap, said inlet manifold having baffles for dividing said inlet manifold into a plurality of flow paths; a plurality of thermal reformers, each selected from a CPO, a POX and an ATR, each disposed in one of said flow paths within said inlet manifold; a fuel nozzle extending into each of said flow paths for injecting internal combustion engine fuel into the corresponding flow path upstream of the related one of said thermal reformers; a source of internal combustion engine fuel; and means for selectively causing pulses of fuel from said source to be periodically injected into corresponding ones of said paths repetitively, for periods of time which are a small fraction of the time between pulses in each one of said flow paths.