% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @PHDTHESIS{Ritter:1009590, author = {Ritter, Dennis}, othercontributors = {Abel, Dirk and Pitsch, Heinz}, title = {{O}ptimierungsbasierte {R}egelung von multimodalen {B}rennverfahren für kompressionsgezündete {M}otoren}, school = {Rheinisch-Westfälische Technische Hochschule Aachen}, type = {Dissertation}, address = {Aachen}, publisher = {RWTH Aachen University}, reportid = {RWTH-2025-03556}, pages = {1 Online-Ressource : Illustrationen}, year = {2024}, note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen University 2025; Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2024}, abstract = {This dissertation addresses the optimization-based control of multimodal combustion processes for compression-ignition engines. The focus is on two engine applications: Natural gas diesel dual-fuel engines and diesel engines. In this work, multi-mode combustion processes are defined as combustion processes that combine different combustion modes. These can typically only be used in parts of the operating map and can differ considerably in terms of their combustion and system characteristics. Specifically, this refers to the combined operation of (conventional) high and low-temperature combustion processes.Low-temperature combustion makes it possible to reduce pollutant emissions while maintaining a high level of efficiency. However, these advantages are accompanied by increased complexity in process control - the full potential can therefore only be exploited using suitable control algorithms. General challenges are the strong non-linearity of the process, the coupled multiple-input-multiple-output (MIMO) characteristic, existing constraints and the fast dynamics. Optimization-based control methods are used for process control in this dissertation. These are based on a mathematical model of the process to be controlled, which is used for real-time optimization of the manipulated variables. This allows non-linearities and MIMO systems to be controlled and constraints to be taken into account directly. A linear time-variant model predictive controller is developed for the control of the natural gas diesel dual-fuel engine. The concept is based on the control of cycle-integral variables and a data-driven combustion model. Experimental validation on the engine test bench shows that the control concept is capable of stabilizing transient operating conditions. Direct combustion rate shaping control is implemented for the diesel engine in order to control the crank angle-resolved pressure or combustion rate profile to a specified target profile using a fully variable multiple injection strategy. From a control system point of view, quasi-continuous manipulated and controlled variables are used. To solve this control problem, a non-linear iterative learning model predictive controller is developed, which specifically utilizes the cyclic process characteristics. For this purpose, a physically motivated model with low complexity is designed, which is structurally suitable for real-time optimization. The control concept is successfully validated in both simulation and experiment.}, cin = {416610}, ddc = {620}, cid = {$I:(DE-82)416610_20140620$}, pnm = {DFG project G:(GEPRIS)277012063 - FOR 2401: Optimierungsbasierte Multiskalenregelung motorischer Niedertemperatur-Brennverfahren (277012063) / BMWK 03SX375C - Verbundprojekt: JB-X-Clean - Entwicklung eines neuen DUAL-FUEL-Konzepts für sicheren, emissionsarmen und flexiblen Binnen- und Küstenschiffsantrieb; Vorhaben: Modellbasierte Regelung der Dual Fuel Verbrennung (03SX375C)}, pid = {G:(GEPRIS)277012063 / G:(BMWK)03SX375C}, typ = {PUB:(DE-HGF)11}, doi = {10.18154/RWTH-2025-03556}, url = {https://publications.rwth-aachen.de/record/1009590}, }