Efficient control of the electromechanical throttle body of internal combustion engines allows one to properly regulate the additional air flow provided to the engine in idle speed conditions. The behavior of the throttle is highly nonlinear, due to its mechanical characteristics and to significant friction forces. The systematic design of the control strategy calls for the availability of a reliable model, and of a related simulation tool. This paper presents the model and the simulation enviromnent developed for and currently used by Magneti Marelli in order to characterize new throttle bodies, and to design the associated control algorithms. It is shown that due to the nonlinearities of the system it is necessary to use a dynamic simulator based on a reliable model of the mechanical device and of its electric actuator for development and testing of efficient control strategies. Special effort is made to describe the identification of the unkown model parameters und the responses of the simulator in significant cases of the real system.
Modeling and identification of an electromechanical internal combustion engine throttle body
Modellierung und Identifikation der elektromechanischen Drosselklappe eines Verbrennungsmotors
Control Engineering Practice ; 5 , 9 ; 1253-1259
1997
7 Seiten, 11 Bilder, 7 Quellen
Aufsatz (Zeitschrift)
Englisch
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