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Investigation of Aging Effects on Combustion and Performance Characteristics of Mining Engines
Journal Article
03-16-04-0030
ISSN: 1946-3936, e-ISSN: 1946-3944
Sector:
Topic:
Citation:
Corti, E., Raggini, L., Rossi, A., Brusa, A. et al., "Investigation of Aging Effects on Combustion and Performance Characteristics of Mining Engines," SAE Int. J. Engines 16(4):515-527, 2023, https://doi.org/10.4271/03-16-04-0030.
Language:
English
Abstract:
The sustainability of mines is becoming ever more important to reduce the
greenhouse gas footprint and keep the resources extraction economically
sustainable. Despite the electrification and hybridization trend of mining
equipment, diesel engines are still expected to maintain their importance as a
primary source of power especially for open pit equipment, thanks to their
longer operating range. However, in order to keep high efficiency and minimize
fuel consumption for the entire operating life it is crucial to understand and
tackle the aging effect on the engine performance. In this research a 500-h
durability test was performed on a Liebherr mining engine, with the aim of
better understanding how aging affects the combustion process and engine
performance (power and fuel consumption), and how this effect can be
compensated. Experimental results show a 1% specific fuel consumption increase,
ascribable to injector aging. Moreover, with the objective of emphasizing other
possible opportunities to further reduce fuel consumption, the possibility of
cancelling cylinder-to-cylinder disparities (maximum IMEP variations of 7%
compared to the average value of 12 cylinders) and optimizing the calibration
setting near the reliability limits (BSFC decrease by 0.7%, compared to the base
calibration) were investigated in the article. The role of cylinder
pressure-based closed-loop control systems as enabling technology to seize these
potential benefits is discussed in this article.