Distributed Diagnosis of Sensor and Actuator Faults in Air Handling Units in Multi-Zone Buildings: A Model-Based Approach

Papadopoulos, Panayiotis; Lymperopoulos, Georgios; Polycarpou, Marios M.; Ioannou, Pétros

doi:10.1016/j.enbuild.2021.111709

Cited by 12 publications

(1 citation statement)

References 53 publications

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“…Observation of residual values, i.e. differences between values derived from the model and from the real measurement [27], enables conclusions regarding not only the injector's technical state but also the type and size of the damage [41].…”

Section: Introductionmentioning

confidence: 99%

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

Mączak¹,

Więcławski²,

Szczurowski³

2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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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.

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Section: Introductionmentioning

confidence: 99%