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Nonlinear model predictive engine airpath control with dual-loop exhaust gas recirculation and variable nozzle turbocharger
journal contribution
posted on 2023-06-10, 04:41 authored by Zihao Liu, Arash Moradinegade DizqahArash Moradinegade Dizqah, Jose M. Herreros, Joschka Schaub, Olivier HaasThe control of engine airpath is a multi-objective tracking problem that aims to achieve a trade-off between emissions and fuel economy. Multiple control variables are simultaneously adjusted to accommodate both fast, slow and coupled nonlinear dynamics. This work proposes a Nonlinear Model Predictive Controller (NMPC) exploiting a convex and multi-rate prediction model to control in real-time the airpath of a compression ignition engine equipped with dual-loop Exhaust Gas Recirculation (EGR) and Variable Nozzle Turbocharger (VNT). Simulation studies and Hardware-in-the-Loop (HiL) implementation of the controller on a 480MHz ARM CortexA7 processor demonstrate reduced tracking error for intake manifold pressure and oxygen concentration by 12% and 21% respectively, whilst showing a 1% improvement in fuel economy. The control algorithm runs in real-time with both average and maximum computational time on HiL, being respectively 1.80 ms and 2.94 ms, below the required control interval of 10 ms.
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Publication status
- Published
File Version
- Accepted version
Journal
SAE International Journal of EnginesISSN
0096-736XPublisher
SAEExternal DOI
Issue
5Volume
16Department affiliated with
- Engineering and Design Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2022-09-12First Open Access (FOA) Date
2023-05-11First Compliant Deposit (FCD) Date
2022-09-09Usage metrics
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