Apparatus, system, and method for reducing emission of nitrogen oxides

A method for reducing emissions of nitrogen oxides, the method comprising:

• providing first and second exhaust gas recirculation subsystems;
• storing, in an exhaust gas storage volume of the second exhaust gas recirculation subsystem, exhaust gas discharged from an internal combustion engine, the exhaust gas being compressed by an exhaust gas compressor, the exhaust gas storage volume being downstream of the exhaust gas compressor;
• determining that at least one exhaust gas insertion enablement condition is being met;
• and
• if it is determined that the at least one exhaust gas insertion enablement condition is being met, inserting compressed exhaust gas stored in the exhaust gas storage volume into the internal combustion engine to reduce the emission of nitrogen oxides.

A computer program product, embodied in a tangible, non-transitory computer-readable medium, comprising computer executable instructions configured to cause a system to:

• provide first and second exhaust gas recirculation subsystems;
• store, in an exhaust gas storage volume of the second exhaust gas recirculation subsystem, exhaust gas discharged from an internal combustion engine, the exhaust gas being compressed by an exhaust gas compressor, the exhaust gas storage volume being downstream of the exhaust gas compressor;
• determine that at least one exhaust gas insertion enablement condition is being met;
• and
• if it is determined that the at least one exhaust gas insertion enablement condition is being met, insert compressed exhaust gas stored in the exhaust gas storage volume into the internal combustion engine to reduce emissions of nitrogen oxides.