Apparatus, System, and Method for Reducing Emission of Nitrogen Oxides

摘要

An apparatus, system and method for reducing the emission of nitrogen oxides in an internal combustion engine system. Exhaust gas directly or indirectly downstream of the internal combustion engine is at least selectively stored in an exhaust gas storage region. Upon the occurrence of at least one enablement condition, indicative of a potential period where the emission of nitrogen oxides (NOx) will increase, the stored exhaust gas is inserted into the internal combustion engine to assist in reducing the emission of the nitrogen oxides. The exhaust gas storage volume regularly, or the exhaust gas storage volume may be filled during strategic periods when the emissions of nitrogen oxides are low and/or there is a low need for the recirculation of exhaust gas.

主权项

1. A system for reducing the emission of nitrogen oxides, the system comprising:
an internal combustion engine; an exhaust gas recirculation subsystem including an exhaust gas storage volume therein; and a controller apparatus in electrical communication with the exhaust gas recirculation subsystem, the controller apparatus configured to control the insertion of exhaust gas from the exhaust gas storage volume to the internal combustion engine, thereby reducing the emission of nitrogen oxides.