Fuel injection control system significantly affects the fuel efficiency and emissions from diesel engine of a commercial truck. For electronic diesel fuel injection control (EDC) systems, e.g., Bosch PE-EDC, possible faults include rack deformation, solenoid valve failure, and rack-travel sensor malfunction. Among these problems, solenoid valve failure is most likely to occur for in-use diesel engines. Since the solenoid valve is mounted inside the diesel fuel pump, it is hard to access for diagnosis. Therefore, this paper is intended to study the characteristics of the failure, and then study the possibility of developing a method for its diagnosis. A method was developed using feed-forward and feedback control algorithms. Through the studies of this paper, it is found that the solenoid failure is caused by the wear between its plunger and sleeve, and the symptom is the variation of Coulomb frictional force. A series of experiments were carried out to show and characterise the symptoms. The proposed method is also validated through these experiments.
Characterisation of solenoid valve failure for electronic diesel fuel injection system of commercial trucks
International Journal of Heavy Vehicle Systems (IJHVS) (Internet) ; 13 , 3 ; 180-193
2006
14 Seiten, 8 Bilder, 9 Quellen
Aufsatz (Zeitschrift)
Englisch
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