Modeling
Control and Adaptation of Lean Aftertreatment Systems
University
of Michigan
Department of Naval
Architecture and Marine Engineering
Advanced technology engines, such as lean burn
port fuel injection and stratified charge direct injection engines, require
much more sophisticated and control intensive aftertreatment to meet stringent
government regulations and demanding customer expectation. Lean NOx trap (LNT),
which provides high NOx conversion efficiency during engine lean operation, has
been investigated as a primary candidate for lean burn technology powertrain.
In this talk, several control challenges in integrating the LNT into advanced
powertrain system will be discussed. Lack of on-board emission measurement has
motivated the application of model-based control. Sensitivity of the trap
characteristics to aging and sulfur poisoning has necessitated control system
adaptation. Recent results on modeling, control and adaptation will be
presented, based on the published work that the speaker has done with her Ford
colleagues.
3:30 – 4:30
p.m.