Metering exhaust gas recirculation system for a dual turbocharged engine having a turbogenerator system

An internal combustion engine comprising:

• an engine block for internal combustion;
• a high-pressure (HP) turbocharger having a turbine and a compressor each in communication with the engine block, the turbine being configured for receiving exhaust gas from the engine block, and the compressor being configured for delivering intake air to the engine block;
• a low-pressure (LP) turbocharger having a turbine and a compressor each in communication with the HP turbocharger, the turbine being configured for receiving exhaust gas from the HP turbocharger turbine, and the compressor being configured for delivering intake air to the HP turbocharger compressor;
• a turbogenerator in communication with the LP turbocharger, the turbogenerator configured for receiving exhaust gas from the LP turbocharger turbine and recovering heat energy from the exhaust gas to generate electricity;
• an exhaust gas recirculation (EGR) system having an EGR-pump, an EGR inlet located downstream from the turbogenerator, and an EGR mixer located between the LP turbocharger compressor and the HP turbocharger compressor, the EGR-pump being configured for drawing exhaust gas from the EGR inlet and controllably delivering exhaust gas to the EGR mixer;
• an exhaust filter located between the LP turbocharger turbine and the turbogenerator;
• a NOx reduction device located downstream of the EGR inlet;
• and
• a electronic control unit (ECU) coupled with the EGR-pump and adapted to command the EGR-pump to deliver a desired EGR rate to the engine.