Electric Current Waveform of the Injector as a Source of Diagnostic Information

Więcławski, Krzysztof; Mączak, Jędrzej; Szczurowski, Krzysztof

doi:10.3390/s20154151

Cited by 9 publications

(11 citation statements)

References 32 publications

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“…The hall-effect current sensors are designed as a separate chips or components, which interrupt current lines or use hole-through technologies. They have internal amplification and compensation circuits and output more stable and precise signal [57], which makes implementation of additional protection algorithms possible [58,59], however these sensors need additional space and significantly increase cost of the power converter, which restricts their usage in low-cost drives. Simultaneously, shunt-based current sensors are small, cheap and suitable for low-cost solutions, but their amplification circuits are placed distantly, which increase noise to signal ratio.…”

Section: Classificationmentioning

confidence: 99%

Phase Loss Detection Using Current Signals: A Review

Dianov

Anuchin

2021

IEEE Access

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This paper discusses open phase faults, which can happen in a system grid-converter-motor drive, and measures to properly handle this type of fault. The authors of this paper provide classification of algorithms used for the detection of the loss of phase and explain the distinctive features of each group of methods. They review existing algorithms, which are based on the analysis of the current signals, discuss their pros and cons and suggest possible areas of usage for each group of methods. The authors also propose one novel method for detection of open phase, which was developed for low-cost systems with low resolution analog-to digital converters (ADC). This paper mainly considers methods for three-phase motors as the most popular machines, however some algorithms can be used in multiphase drives. The authors of the paper also share their more than 20 years' experience combined, in this area, which was obtained by developing industrial and commercial drives, and focus on the requirements of the IEC/UL 60730 safety standard, where the phase-loss detection algorithm is one of the essential parts of control system.

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Section: Classificationmentioning

confidence: 99%

Phase Loss Detection Using Current Signals: A Review

Dianov

Anuchin

2021

IEEE Access

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“…The hardware-in-the-loop simulation links a portion of the real system equipment to the computer, simulates a portion of the real system equipment using the mathematical model, and simultaneously assures the function of the whole system. Krzysztof Wiecławski et al [ 31 , 32 ] introduced a model of an injector in the form of a current waveform that describes the changes in current and voltage during its operation. The actual start time and duration of injection can be determined using a mathematical model that describes the voltage-current phenomenon during the injector operation.…”

Section: Related Workmentioning

confidence: 99%

A Segmentation Model of ECU Excitation Signal Based on Characteristic Parameters

Zheng

Wang

2021

Sensors

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According to the basic structure and working principle of the excitation signal sensors of a diesel engine electronic control unit (ECU), a segmentation model of an ECU excitation signal based on characteristic parameters (ESCP-SM) is proposed. In the ESCP-SM, the ECU excitation signal is divided into several parts, and each part has its characteristic parameters model. By using the same global parameters and strictly controlling each part’s proportional parameters, the ESCP-SM can achieve signal alignment and dynamic frequency modulation. Based on the simulation experiment, spectrum analysis proves that this modeling method ensures that the original signal’s effective information is not lost. Pearson similarity analysis shows that the similarity between the simulation signal and practical signal reaches 74%, exhibiting strong correlation. In addition, we set up a physical testing environment. ESCP-SM is realized based on virtual instrument technology, and provides excitation signals for a Komatsu 8 ECU. By modifying the parameter configuration, the ECU can drive the injector to work correctly.

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“…It has been determined that the geometry of the needle and of the nozzle channel affects the delay in the actuator’s operation. What causes the above is also the electric current phenomena such as the increase in the current intensity and in the resultant magnetic flux around the injector core [ 2 ]. The work of Sun et al [ 3 ] discussed the developed algorithm for recognition of the characteristics of the opening and shutting off the fuel flow; the method of auto-adaptation of the flow characteristics was proposed as well as the method for compensation in the width of the injection control impulse on the basis of the negative-loop signal of the voltage controlling the injector.…”

Section: Introductionmentioning

confidence: 99%

“…One of the important directions of research on their development is the elaboration of systems for automatic diagnosing of the condition of actuator valves as components that have a significant impact on the operation of engines, fuel consumption, and emissions of toxic exhaust components. The authors’ previous research into analyzing current signals of internal combustion engines [ 2 , 8 , 32 , 33 ], especially fuel injectors, has led to a conclusion that in the considered case of injector research, there is an unambiguous lack of software of this type for analyzing the current values of injectors in an automatic manner during their operation on the engine. The development of these systems may contribute to the emergence/expansion of self-adjustment or adaptive systems relative to their momentary technical condition in the future.…”

Section: Introductionmentioning

confidence: 99%

Recognizing Significant Components of Electrical Waveforms of Actuators Operated by Vehicle Controllers

Więcławski

Antkowiak

Figlus

2022

Sensors

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This work discusses the proposition of the identification of electrical waveforms resulting from the executive systems’ operation, controlled by the vehicle electronic modules. This proposition results from the fact that the electric current powering the actuator has two functions: to supply and to control. Observation of such waveforms enables the ongoing control as well as the diagnostics of the state of the executive elements. This work focused on the fundamentals of the method implementation in the vehicle controller. The algorithm for detecting the model values of the waveform has been developed and described, allowing for an efficient control of the system. The algorithm, after being used in the memory of the control module and having the measuring subassemblies (gauging the voltage and electric current) added, will enable the automatic detection of the essential values. The developed code, after the optimization, can support the control performed by the ECU, which is damage-orientated. The paper presents examples of the operation of a computational program developed on the basis of the adopted algorithm. Tests were performed on an electromagnetic valve—fuel injector—of a spark-ignition engine for different cases of its operation. The effectiveness of the program was demonstrated when detecting changes occurring in the current signals of fuel injectors corresponding to different engine speeds (time of 4 and 8 ms) and different loads (pressure of 0.2 and 0.4 MPa).

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Electric Current Waveform of the Injector as a Source of Diagnostic Information

Cited by 9 publications

References 32 publications

Phase Loss Detection Using Current Signals: A Review

Phase Loss Detection Using Current Signals: A Review

A Segmentation Model of ECU Excitation Signal Based on Characteristic Parameters

Recognizing Significant Components of Electrical Waveforms of Actuators Operated by Vehicle Controllers

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