Abstract
Idle Control of Internal Combustion Engines (ICEs) is one of the most important modules of Engine Management Systems (EMS) due to its effects on fuel consumption (FC) and pollutions produced in urban traffics. PID controllers are usually used for idle speed regulation. In this paper a PID like fuzzy controller is used to control the idle speed. The aim of this research is to introduce the selection method of membership functions for nonlinear processes which have unsymmetrical behaviors around working point. Also a simple yet useful graphical base approach to optimize fuzzy like PID controller is introduced. In order to design the controller a mean value model of a 1.6 turbocharged diesel engine is applied. In this model the effects of injection timing, injected fuel mass, ambient conditions and cycle by cycle torque generation variations are taken into account. The model also predicts the engine behavior in warm-up period. Two main manipulated variables of injection timing and injected fuel mass per cycle are handled to control the engine speed under different sources of engine speed variation such as external loads made by A/C, steering hydraulic pump or alternator and also the internal loads e.g. variable internal friction. The designed controller shows high robustness in response to change in ambient conditions.
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Kamyar Nikzadfar (1984) received his B.Sc. in Mechanical Engineering/Heat and Fluid from Ferdowsi University of Mashhad, (FUM), Mashhad, Iran in 2006, M.Sc. in Automotive Engineering/Powertrain Systems from Iran University of Science and Technology (IUST), Tehran, Iran in 2009 and is currently Ph.D candidate in Mechanical Engineering in K.N. Toosi University of Technology (KNTU), Tehran, Iran with concentration on powertrain control and mechatronic systems. He is head and also instructor of Automotive Engineering department in Iran-Khodro University of Applied Science and Technology (IKCO-UAST) and founder of automotive mechatronics lab in IKCO-UAST. He’s also a member of Iranian Society of Mechatronics and IFAC-Automotive association. His field of research interest is mechatronic systems and control.
Alireza Noorpoor (1974) received his B.Sc. in Mechanical Engineering from Mazandaran University, Babol, Iran in 1998, M.Sc. and Ph.D in Mechanical Engineering from Iran University of Science and Technology (IUST), Tehran, Iran at 2000 and 2006 respectively. He was an Assistant Professor of Automotive Engineering Faculty in Iran University of Science and Technology since 2006 till 2011. Now he is an Assistant Professor in Graduate Faculty of Environment in Tehran University. His field of research is energy and environment, CFD, heat transfer and system identification.
Amir H. Shamekhi (1970) received his B.Sc. in Mechanical Engineering from University of Tehran, Tehran, Iran in 1994, M.Sc. and Ph.D in Mechnical Engineering from K.N. Toosi University of Technology (KNTU), Tehran, Iran at 1997 and 2004 respectively. He is an Assistant Professor of Mechanical Engineering Faculty of K.N. Toosi University of Technology since 2006. His field of research is automotive control systems, mechatronics systems and internal combustion engines.
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Nikzadfar, K., Noorpoor, A. & Shamekhi, A.H. Design of an optimal idle speed controller for a turbocharged diesel engine using fuzzy logic method. J Mech Sci Technol 26, 2325–2336 (2012). https://doi.org/10.1007/s12206-012-0611-4
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DOI: https://doi.org/10.1007/s12206-012-0611-4