| 20100050613 | PROCESS FOR REDUCING NOX EMISSIONS FROM ENGINE EXHAUST USING LNT AND SCR COMPONENTS - A method of reducing NOx in a vehicle exhaust operating by alternating exhaust flow between two lean NOx traps and directing the emerging exhaust to a downstream SCR catalyst system. While exhaust predominantly flows through one of the lean NOx traps, a reductant is provided to the other NOx trap so as to produce ammonia that is also directed to the SCR catalyst system. An exhaust system implementing the method of the invention is also provided. | 03-04-2010 |
