TY - JOUR
TI - Analysis of the effect of piezoelectric sensor ageing on indicated parameters
AU - Mrđa Predrag D
AU - Popović Slobodan J
AU - Miljić Nenad L
AU - Kitanović Marko
AU - Bukušić Nemanja
JN - Thermal Science
PY - 2026
VL - 30
IS - 1
SP - 453
EP - 465
PT - Article
AB - The research examines the ageing behavior of piezoelectric pressure sensors  for internal combustion engine studies while concentrating on their  declining sensitivity as time progresses. Reliable measurement of  in-cylinder pressure demands precise monitoring of sensor performance to  support both thermodynamic analysis and evaluation of engine performance.  Research experiments performed with a single-cylinder research engine (SCRE)  determine how the working cycle operational parameters relate to sensor  properties, especially the indicated mean effective pressure (IMEP) and  polytropic coefficients of the compression/expansion phase of the engine  working process. The study demonstrates that monitoring polytropic  coefficients provides an efficient technique for detecting sensitivity  degradation without needing continuous pressure sensor recalibration,  improving both accuracy and efficiency during prolonged engine testing. The  approach allows researchers to detect sensor degradation on time, which  helps maintain data integrity throughout lengthy research campaigns.
DO - 10.2298/TSCI250407122M
ER -