SYSTEMS AND METHODS FOR DEDICATED EXHAUST GAS RECIRCULATION AND CONTROL

摘要

Systems and methods for exhaust gas recirculation are provided. The system includes a dedicated exhaust gas recirculation loop for recirculating exhaust gas flow from at least one dedicated cylinder of an engine into an intake system prior to combustion. The system further includes a low pressure exhaust gas recirculation loop for increasing the exhaust gas recirculation amount above that provided by the dedicated exhaust gas recirculation loop.

主权项

1. A method, comprising:
operating an internal combustion engine including a plurality of cylinders, an exhaust system, and an intake system, at least one of the plurality of cylinders being operably connected to provide exhaust flow to a dedicated exhaust gas recirculation system and a remaining portion of the plurality of cylinders being operably connected to provide exhaust flow to the exhaust system; determining an amount of recirculated exhaust gas to include in a charge flow to the internal combustion engine during operation; providing a first portion of the amount of recirculated exhaust gas with exhaust flow from the dedicated exhaust gas recirculation system; and providing a remaining portion of the amount of recirculated exhaust gas from exhaust flow in the exhaust system through a low pressure exhaust gas recirculation loop connecting the exhaust system to the intake system.