Modeling, Estimation and Control Problems in Direct Injection
Dr. Ilya Kolmanovsky
Ford Research Laboratory
Modern gasoline and Diesel engines combine sophisticated
combustion chamber design, advanced air and fuel
delivery systems and novel aftertreatment components that are
required to meet stringent emission, fuel economy and
driveability targets. The control technology figures
prominently as a key enabler for these advanced
technology powertrains. The talk will overview some of the control
problems for advanced technology direct injection Diesel engines and, at
will touch upon similar developments for direct injection
gasoline engines. Specifically, a control problem
for a variable geometry turbocharger (VGT) and exhaust
gas recirculation (EGR) will be addressed first.
The numerical solution of an optimal control problem
will be shown to yield useful information about proper
ways of operating EGR and VGT actuators during
transients and suggest a feedback controller
architecture. The interplay between closed loop stability,
performance, set-point selection and feedback controller architecture
will be discussed.
Second, an air-charge estimation problem
will be treated by combining an open-loop
observer and a disturbance-input observer. The results will
be applied to a fueling rate limiter design.
Third, cylinder-balancing algorithms using different
sensor sets will be described.