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Closed-Loop Control of HCCI Engine Dynamics

Bengtsson, Johan LU (2004) In PhD Theses TFRT-1070.
Abstract (Swedish)
Popular Abstract in Swedish

Avhandlingen behandlar reglering av Homogeneous Charge Compression Ignition (HCCI) motor dynamik. HCCI erbjuder möjligheten att kombinera hög effektivitet med väldigt låga emissioner. Återkopplad reglering är ett sätt att uppnå dessa mål.



Avhandlingen diskuterar sensorer, återkopplingsvariabler och aktuatorer för sluten-loop reglering av HCCI förbränningen. Det är demonstrerat att jonström kan användas för reglering av HCCI förbränning.



Modeller av HCCI dynamiken vilka är lämpliga för reglerdesign är framtagna. Resultat visas att lägre ordningens modeller är tillräckliga för att beskriva HCCI dynamiken. Modellerna har blivit framtagna både med system... (More)
Popular Abstract in Swedish

Avhandlingen behandlar reglering av Homogeneous Charge Compression Ignition (HCCI) motor dynamik. HCCI erbjuder möjligheten att kombinera hög effektivitet med väldigt låga emissioner. Återkopplad reglering är ett sätt att uppnå dessa mål.



Avhandlingen diskuterar sensorer, återkopplingsvariabler och aktuatorer för sluten-loop reglering av HCCI förbränningen. Det är demonstrerat att jonström kan användas för reglering av HCCI förbränning.



Modeller av HCCI dynamiken vilka är lämpliga för reglerdesign är framtagna. Resultat visas att lägre ordningens modeller är tillräckliga för att beskriva HCCI dynamiken. Modellerna har blivit framtagna både med system identifiering och med fysikalisk modellering.



Regleringen har skett på en sexcylindring 12 liter lastbilsmotor och regleringen har skett antingen genom ett variabelt cylinder ventilsystem eller med ett två bränslesystem.



Regleringen av förbränningsfasningen är en begränsande faktor för lastregleringen och emissionsregleringen. Ett system där HCCI förbränningen är reglerad på cylinder individuell cykel-till-cykel bas är presenterat och implementerat. Olika reglermetoder för att reglera HCCI förbränningen är presenterade och demonstrerade. Modelbaserade metoder såsom LQG och MPC och PID reglering gav tillfredställande reglerprestanda. En MPC regulator föreslås som lösning på problemet med lastreglering och samtidig minimering av bränsleförbrukningen och emissionerna. Dessutom måste cylindertrycket begränsas. (Less)
Abstract
The topic of the thesis is control of Homogeneous Charge Compression Ignition (HCCI) engine dynamics. HCCI offers a potential to combine high efficiency with very low emissions. In order to fulfill the potential benefits, closed-loop control is needed.



The thesis discusses sensors, feedback signals and actuators for closed-loop control of the HCCI combustion. Closed-loop control of the HCCI combustion using ion current is demonstrated.



Models of the HCCI dynamics suitable for purposes of control design are presented. It is shown that low-order models are sufficient to describe the HCCI dynamics. Models of HCCI combustion have been determined both by system identification and by physical... (More)
The topic of the thesis is control of Homogeneous Charge Compression Ignition (HCCI) engine dynamics. HCCI offers a potential to combine high efficiency with very low emissions. In order to fulfill the potential benefits, closed-loop control is needed.



The thesis discusses sensors, feedback signals and actuators for closed-loop control of the HCCI combustion. Closed-loop control of the HCCI combustion using ion current is demonstrated.



Models of the HCCI dynamics suitable for purposes of control design are presented. It is shown that low-order models are sufficient to describe the HCCI dynamics. Models of HCCI combustion have been determined both by system identification and by physical modeling.



Different methods for characterizing and controlling the HCCI combustion are outlined and demonstrated. In cases where the combustion phasing in a six-cylinder heavy-duty engine was controlled, either by a Variable Valve Actuation system using the inlet valve or a dual-fuel system, results are presented.



Combustion phasing is a limiting factor of the load control and emission control performance. A system where control of HCCI on a cycle-to-cycle basis is outlined and cylinder individual cycle-to-cycle control on a six-cylinder heavy duty engine is presented. Various control strategies are compared. Model-based control, such as LQG and Model Predictive Control MPC, and PID control are shown to give satisfactory controller performance. An MPC controller is proposed as a solution to the problem of load-torque control with simultaneous minimization of the fuel consumption and emissions, while satisfying the constraints on cylinder pressure. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Professor Gerdes, Christian, USA.
organization
publishing date
type
Thesis
publication status
published
subject
keywords
robotteknik, Automatiska system, reglerteknik, Automation, robotics, control engineering
in
PhD Theses
volume
TFRT-1070
pages
184 pages
publisher
Department of Automatic Control, Lund Institute of Technology (LTH)
defense location
M-building, Lund Institute of Technology
defense date
2004-11-26 10:15
ISSN
0280-5316
language
English
LU publication?
yes
id
4538257b-083f-4076-af25-295e60cf8cca (old id 21692)
date added to LUP
2007-05-28 14:17:50
date last changed
2016-09-19 08:44:55
@phdthesis{4538257b-083f-4076-af25-295e60cf8cca,
  abstract     = {The topic of the thesis is control of Homogeneous Charge Compression Ignition (HCCI) engine dynamics. HCCI offers a potential to combine high efficiency with very low emissions. In order to fulfill the potential benefits, closed-loop control is needed.<br/><br>
<br/><br>
The thesis discusses sensors, feedback signals and actuators for closed-loop control of the HCCI combustion. Closed-loop control of the HCCI combustion using ion current is demonstrated.<br/><br>
<br/><br>
Models of the HCCI dynamics suitable for purposes of control design are presented. It is shown that low-order models are sufficient to describe the HCCI dynamics. Models of HCCI combustion have been determined both by system identification and by physical modeling.<br/><br>
<br/><br>
Different methods for characterizing and controlling the HCCI combustion are outlined and demonstrated. In cases where the combustion phasing in a six-cylinder heavy-duty engine was controlled, either by a Variable Valve Actuation system using the inlet valve or a dual-fuel system, results are presented.<br/><br>
<br/><br>
Combustion phasing is a limiting factor of the load control and emission control performance. A system where control of HCCI on a cycle-to-cycle basis is outlined and cylinder individual cycle-to-cycle control on a six-cylinder heavy duty engine is presented. Various control strategies are compared. Model-based control, such as LQG and Model Predictive Control MPC, and PID control are shown to give satisfactory controller performance. An MPC controller is proposed as a solution to the problem of load-torque control with simultaneous minimization of the fuel consumption and emissions, while satisfying the constraints on cylinder pressure.},
  author       = {Bengtsson, Johan},
  issn         = {0280-5316},
  keyword      = {robotteknik,Automatiska system,reglerteknik,Automation,robotics,control engineering},
  language     = {eng},
  pages        = {184},
  publisher    = {Department of Automatic Control, Lund Institute of Technology (LTH)},
  school       = {Lund University},
  series       = {PhD Theses},
  title        = {Closed-Loop Control of HCCI Engine Dynamics},
  volume       = {TFRT-1070},
  year         = {2004},
}