Baza Publikacji Pracowników Politechniki Lubelskiej

Status:
Autorzy:	Sen Asok K., Litak Grzegorz, Finney C.E.A. , Wagner Robert M.
Rok wydania:	2010
Wersja dokumentu:	Drukowana \| Elektroniczna
Język:	angielski
Numer czasopisma:	5
Wolumen/Tom:	87
Strony:	1736 - 1743
Impact Factor:	3,915
Web of Science® Times Cited:	49
Scopus® Cytowania:	59
Bazy:	Web of Science \| Scopus
Efekt badań statutowych	NIE
Materiał konferencyjny:	NIE
Publikacja OA:	NIE
Abstrakty:	angielski
	In this paper we analyze data from previously reported experimental measurements of cycle-to-cycle combustion variations in a lean-fueled, multi-cylinder spark-ignition (SI) engine. We characterize the changes in the observed combustion dynamics with as-fed fuel–air ratio using conventional histograms and statistical moments, and we further characterize the shifts in combustion complexity in terms of multifractals and wavelet decomposition. Changes in the conventional statistics and multifractal structure indicate trends with fuel–air ratio that parallel earlier reported observations. Wavelet decompositions reveal persistent, non-stochastic oscillation modes at higher fuel–air ratios that were not obvious in previous analyses. Recognition of these long-time-scale, non-stochastic oscillations is expected to be useful for improving modelling and control of engine combustion variations and multi-cylinder balancing.

Analysis of heat release dynamics in an internal combustion engine using multifractals and wavelets