DUAL FUEL SYSTEMS AND METHODS WITH ADVANCED EXHAUST GAS RECIRCULATION

摘要

Systems and methods for fuelling a plurality of cylinders of an internal combustion engine are disclosed. The system includes an exhaust gas recirculation system for recirculating exhaust gas flow from at least one primary EGR cylinder of an engine into an intake system prior to combustion. The system further includes a fueling system to provide a first flow of a first fuel to each of the plurality of cylinders and a second flow of a second fuel to each of the primary EGR cylinders that is in addition to the first flow of the first fuel.

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 a primary exhaust gas recirculation (EGR) cylinder operably connected to provide exhaust flow to an exhaust gas recirculation (EGR) system and a remaining portion of the plurality of cylinders being operably connected to provide exhaust flow to the exhaust system, and further comprising a first fuel source that is connected to each of the plurality of cylinders and a second fuel source connected at least to the at least one primary EGR cylinder; providing a first fuel flow only from the first fuel source to each of the plurality of cylinders in response to a first load condition of the internal combustion engine; and in response to a second load condition of the internal combustion engine that is one of a low load condition and a high load condition, providing a second fuel flow from the second fuel source to the at least one primary EGR cylinder while providing the first fuel flow to each of the plurality of cylinders, wherein the first load condition is between the low load condition and the high load condition.