 Cycle-to-cycle variations in diesel enginesPanagiotis Kyrtatos, Clemens Brückner and Konstantinos Boulouchos Applied Energy, 2016, vol. 171, issue C, 120-132 Abstract: Cyclic variations in diesel engines are undesirable since they are understood to lead to lower efficiency and higher emissions, as well as power output limitations. This work aims to improve the understanding of the source of cycle-to-cycle variations of in-cylinder pressure in conventional diesel engines and the implications these have for measurement and simulation best practices. Measurements in a single-cylinder diesel engine employing single injection, under low temperature end-of-compression conditions and variable charge O2 concentration have shown that in-cylinder pressure fluctuations – i.e. excitation of the first radial mode of vibration of the cylinder gases, caused in single cycles by the rapid premixed combustion – result in increases in diffusion heat release rate. The average intensity of the pressure fluctuations was shown to increase with increasing amount and reactivity of the premixed combustion. This results in higher cycle-to-cycle variations under these conditions, revealed by greater cyclic deviations of maximum pressure. Keywords: Cycle-to-cycle variations; Diesel combustion; Ignition delay; Pressure fluctuations; Diffusion combustion (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:171:y:2016:i:c:p:120-132 Ordering information: This journal article can be ordered from DOI: 10.1016/j.apenergy.2016.03.015 Access Statistics for this article Applied Energy is currently edited by J. Yan More articles in Applied Energy from Elsevier |
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