APPARATUS, SYSTEM, AND METHOD FOR CONTROLLING EXHAUST EMISSIONS USING A PRE-FILTER

摘要

According to one embodiment, an apparatus for controlling exhaust emissions using a pre-filter includes an intake charge module (200) and EGR system module (210) respectively configured to determine a desired air intake flow rate (202) and desired EGR gas flow rate (212) into an engine (11) based at least partially on a desired oxygen concentration in the engine. Additionally, the apparatus includes a pre-filter module (230) configured to modify the desired air intake flow rate and the desired EGR gas flow rate based at least partially on predetermined transient response characteristics of an air handling system (50) of the engine. The desired air intake flow rate is achievable by commanding a fresh air regulator (51) to achieve the modified air intake flow rate (232) and the desired EGR gas flow rate is achievable by commanding an EGR regulator (32) to achieve the modified EGR gas flow rate (234).