SYSTEMS AND METHOD FOR CONTROLLING DIESEL ENGINE EMISSIONS

摘要

System and method for controlling diesel engine emissions, incl uding, for example, oxides of nitrogen emissions, particulate matter emissions, and the like. The emission control (1) system according to this invention is provided in the exhaust passageway of a diesel engine (5) and includes a catalyst-based particulate filter(15); and first and second lean NOx trap systems (10,20) coupled to the catalyst-based particulate filter (15). The first and second lean NOx trap systems (10,20) are arranged in a parallel flow configuration with each other. Each of the first and second lean NOx trap systems include a carbon monoxide generating catalyst device (12,22), a sulfur trap device (14,24), a lean NOx device (16,26), a supplemental fuel injector device, and a plurality of flow diverter devices.