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Title: Repeatability of High-Pressure Measurement in a Diesel Engine Test Bed
Authors: Skrzek, Tomasz
Rucki, Mirosław
Górski, Krzysztof
Matijošius, Jonas
Barta, Dalibor
Caban, Jacek
Zarajczyk, Janusz
Keywords: high pressure
engine performance
engine test bed
measurement system
measurement uncertainty
repeatability
Issue Date: 2020
Publisher: MDPI
Citation: Skrzek, T.; Rucki, M.; Górski, K.; Matijošius, J.; Barta, D.; Caban, J.; Zarajczyk, J. Repeatability of High-Pressure Measurement in a Diesel Engine Test Bed. Sensors 2020, 20, 3478.
Series/Report no.: 20;12
Abstract: This paper addresses the issue of metrological accuracy of instantaneous in-cylinder pressure measurement in a diesel engine test bed. In studies, the central unit has been the single-cylinder AVL 5402 engine. The pressure measurement was performed with a sensor designed for thermodynamic analysis, and the results were related to the crank angle, where two rotations corresponding to the four-stroke working cycle were denoted as angles between −360° and +360°. The novelty of this paper is the proposition of how to perform a type A uncertainty estimation of the in-cylinder pressure measurement and to assess its repeatability. It was demonstrated that repeatability of the measurement during the ignition process was difficult to estimate because of the phenomena that cannot ensure the repeatability conditions. To solve the problem, two methods were proposed. In one method, the pressure was measured in the subsequent cycles immediately after the ignition was turned off, and in another method, the engine was driven by a starter. The latter method provided maximal pressure values much lower than during usual tests. The obtained repeatability of measured pressure was %EV = 0.4%, which proved high capability of the evaluated measurement system.
Description: This article belongs to the Special Issue Sensors in Experimental Mechanics
URI: http://dspace.vgtu.lt/handle/1/4017
ISSN: 1424-8220
Appears in Collections:Moksliniai straipsniai / Research articles

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