20.500.12556/RUL-175825 A method for determining the high-frequency in-cylinder pressure of an internal combustion engine using a pressure sensor dynamically calibrated with a shock tube A key parameter for determining the different dynamic parameters of an internal combustion engine (ICE) is the high-frequency pressure in the combustion chamber. The uncertainty of these parameters is dominated by the dynamic accuracy of pressure sensors (PSs). However, PSs used in dynamic applications are typically calibrated quasi-statically with conventional static standards, which limits their accuracy. To address this limitation, this paper proposes and evaluates a method for determining the high-frequency in-cylinder pressure of an ICE using a PS dynamically calibrated with a shock tube (ST). The method reconstructs the in-cylinder pressure by applying an inverse discrete Fourier transform to the ratio of the frequency spectrum of the PS voltage output response and the complex frequency response function of the PS obtained with a dynamic calibration using a ST. The method was tested on a diesel ICE over a wide range of operating conditions using a piezoelectric PS calibrated in a diaphragmless ST. The Monte Carlo uncertainty analysis shows that the proposed method improves the accuracy of high-frequency in-cylinder pressure determination. Consequently, it significantly improves the accuracy of other dynamic ICE parameters, such as the rate of pressure rise, the average in-cylinder gas temperature and the rate of heat release. high-frequency pressure frequency response piezoelectric pressure sensor rate of pressure rise temperature rate of heat release Monte Carlo uncertainty analysis true false true Angleški jezik Ni določen Članek v reviji 2025-11-10 12:27:29 2025-11-10 12:27:35 2026-06-13 04:29:36 0000-00-00 00:00:00 2025 0 0 24 str. Vol. 241, art. 113534 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 536 0888-3270 10.1016/j.ymssp.2025.113534 256539395 1-s2.0-S088832702501235X-main.pdf 1-s2.0-S088832702501235X-main.pdf 1 F06EBA28D16FF6F96BE04D92404B3C68 575d81a2d6abcb6f96b5429266702ede6625cd5289c1e67dcef95f650f8f5fe1 bfe6b51e-665f-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=235478 https://www.sciencedirect.com/science/article/pii/S088832702501235X 1 ef363039-be27-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=221710 Fakulteta za strojništvo 0 0 0