New approach of model based detection of early stages of fuel injector failures

• Published in: Eksploatacja i niezawodność
• Main Authors: Mączak, Jędrzej, Więcławski, Krzysztof, Szczurowski, Krzysztof
• Format: Journal Article
• Language: English
• Published: 01-01-2023
• ISSN: 1507-2711; 2956-3860
• DOI: 10.17531/ein.2023.1.6

The aim of the work was to develop a method of real time diagnosing
electromagnetic fuel injectors using the observation of electric current
parameters available in the engine control unit. Performing this task
required finding a precise criterion for assessing the correct operation of
an electromagnetic injector. For this purpose, a mathematical model
describing the individual phases of the injector's operation was used,
allowing the simulation of the occurrence of typical failures. On its basis,
symptoms of particular failures were determined based on the
observation of electric current parameters in the control circuit.
Observation of voltage and current waveforms allows to locate both
electrical and mechanical damages to the injectors and to assess the
correctness of the power system components. The presented diagnostic
method allows the detection of the described damages in the early stages
of their development, which prevents damage to the catalytic converter
and other engine systems (valves, piston rings or cylinder surfaces), i.e.
damages resulting from an incorrect fuel mixture.