Abstract
The article discusses the method of evaluation of the fuel injector operation based on the observation of the electric current parameters, which were measured with a current transducer using the Hall effect, during the dosing process. This method relies on comparison of the electric current-related values of the examined injector with the model characteristics, which are representing the properly functioning injector. A model of the fuel injector in the form of the electric current waveform that describes the changes in the electric current and voltage during its work is presented in this article. Complex equations describing the fuel injector model under discussion account for the characteristics of the current variations, with no damage-induced modifications. Due to these, the modeled electric current/voltage waveform mirrors the real conditions. The use of a mathematical model describing the voltage–current phenomena occurring during the injector operation allows determining the actual beginning and duration of the injection. The model can also be used to develop new injector diagnostic methods that can be implemented in the engine controller (ECU).
Highlights
IntroductionThis article article discusses discusses the the method method of of evaluation evaluation of of the the fuel fuel injector injector operation operation based based on on the theThis observation of the electric current parameters during the dosing process.This method relies on observation of the electricThis method relies on comparison ofofthethe electric current-related valuesvalues of the examined injector with the model comparison electric current-related of the examined injector withcharacteristic, the model representing the properly functioning injector
A correctly identified model of the fuel injector in the form of an electric current waveform representing a properly working injector, after being implemented in the engine controller, allows the determination of characteristic quantities that can be treated as reference values for comparison with the actual values recorded during the injector engine operation
A mathematical model of the injector was presented based on the analysis of the electric current and voltage waveforms in the injector circuit
Summary
This observation of the electric current parameters during the dosing process. This method relies on comparison ofofthethe electric current-related valuesvalues of the examined injector with the model comparison electric current-related of the examined injector withcharacteristic, the model representing the properly functioning injector. 1 showsFigure a cross-section an electromagnetic characteristic, representing the properly functioning. 1 shows of a cross-section of an fuel injector
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