Fuel injector diagnostics based on observations of magnetic flux changes
More details
Hide details
Institute of Vehicles, Warsaw University of Technology.
Institute of Vehicles, Warsaw University of Technology
Online publish date: 2018-08-07
Publish date: 2018-08-07
Submission date: 2018-05-10
Final revision date: 2018-07-30
Acceptance date: 2018-08-07
Diagnostyka 2018;19(3):89–93
The article discusses mutual relations of the dosage characteristics, current intensity characteristics, and voltage characteristics in the fuel injector electromagnet. Changes in current in the electromagnet’s coil were monitored in the course of dosage by means of the Hall sensor. Change in the Hall voltage is proportional to the changes in density of the magnetic flux generated around the injector coil during its work. The model of the current dependencies was used to determine the injector technical state in the actual time. The presented diagnostics proposition was created on the basis of the injector dosage characteristics obtained due to experimental research. Change in characteristic values, recorded during generation of the fuel dose allows for determination of the injector technical state, regarding both, the current-related and the mechanical parameters. Controlling in the actual time enables corrections in control parameters as a response to changes, as well as quick detection of damage resulting in switching the injector off the operation. This prevents the faulty operation of the injector, which may result in damage to subsequent components depending on its operation, such as the catalytic reactor.
Krzysztof Więcławski   
Institute of Vehicles, Warsaw University of Technology., Narbutta, 84, 02-524 Warszawa, Polska
1. Ferguson CR, Kirkpatrick AT. Internal combustion engines: applied thermosciences. John Wiley & Sons. 2015.
2. Zhou LY, Dong F, Cui HF, Wu XW, Xue FY, Luo FQ. Measurements and analyses on the transient discharge coefficient of each nozzle hole of multi-hole diesel injector. Sensors and Actuators A: Physical. 2016; 244(15): 198-205. https://doi.org/10.1016/j.sna.....
3. Moran KD. Method for controlling fuel injector valve solenoid current. 04 September 2003. Espacenet (European Patent Office).
4. Erfan I, Chitsaz I, Ziabasharhagh M, Hajialimohammadi A, Fleck B. Injection characteristics of gaseous jet injected by a single-hole nozzle direct injector. Fuel. 2015; 160(15): 24-34, https://doi.org/10.1016/j.fuel....
5. Szpica D. The influence of selected adjustment parameters on the operation of LPG vapor phase pulse injectors. Journal of Natural Gas Science and Engineering. 2016; 34: 1127-1136.https://doi.org/10.1016/j.jngs....
6. Mitukiewicz G, Dychto R, Leyko, J. Relationship between LPG fuel and gasoline injection duration for gasoline direct injection engines. Fuel; 2015; 153: 526-534 https://doi.org/10.1016/j.fuel....
7. Merola S, Tornatore C, Sementa P. Optical investigation of the fuel injector influence in a PFI spark ignition engine for two-wheel vehicles. Journal of Mechanical Science and Technology. 2012; 26(1):223-233.
8. Czarnigowski J, Jakliński P, Zyska T, Duk M. An empirical model of current in the pulse gas injector’s circuit model. Przegląd Elektrotechniczny, 2014; 90(3): 195-198.
9. Czarnigowski J. Effect of calibration method on gas flow through pulse gas injector: Simulation tests (Combustion Engines. 2013; 154(3): 383-392.
10. Chai B, Gao W. Simulation on Fuel Injection System for EUP Based on AMESim. 2010. Second International Conference on Computer Modeling and Simulation. 2010 IEEE http://doi.ieeecomputersociety....
11. Yezerets A, Prasad P, Zhang Y, Wilhelm D, Currier N. System, method and apparatus for fuel injector. Diagnostics. Cummins Inc. 03 April 2012. Espacenet patent.
12. Cinpinski KJ, Lee B, Dibble DL, Lucido MJ, Carr MD. Fuel injector diagnostic system and method for direct injection engine. 19 July 201. Espacenet patent.
13. Padala S, Le M K, Kook S, Hawkes E R. Imaging diagnostics of ethanol port fuel injection sprays for automobile engine applications. Applied Thermal Engineering 2013; 52(1): 24-37.
14. Jianmina L, Yupenga S, Xiaominga Z, Shiyongb X, Lijunac D. Fuel Injection system fault diagnosis based on cylinder head vibration signal. Procedia Engineering. 2011; 16: 218-223.
15. Sarwar A, Sankavaram C, Lu X. Diagnosis and prognosis of fuel injectors based on control adaptation. The Prognostics and Health Management Society. 2010.
16. Wierzbicki S, Smieja M. Visualization of the parameters and changes of signals controlling the operation of common rail injectors. Solid State Phenomena, 2014; 210:136-141. https://doi.org/10.4028/www.sc....