The effect of soot and diesel contamination on wear and friction of engine oil pump

Salehi, Fatemeh; Morina, Ardian; Neville, Anne

doi:10.1016/j.triboint.2017.05.041

Cited by 56 publications

(10 citation statements)

References 41 publications

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“…Maintenance, in general, and the condition monitoring, in particular, aims to combine increase of reliability with the lowest costs possible, being direct or indirect. In this type of maintenance, Some relevant topics about related works on condition monitoring and predictive maintenance based on oil analysis, in urban buses fleets, are mentioned and discussed in [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Condition Monitoring with Prediction Based on Diesel Engine Oil Analysis: A Case Study for Urban Buses

et al. 2019

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This paper presents a case study and a model to predict maintenance interventions based on condition monitoring of diesel engine oil in urban buses by accompanying the evolution of its degradation. Many times, under normal functioning conditions, the properties of the lubricants, based on the intervals that manufacturers recommend for its change, are within normal and safety conditions. Then, if the lubricants’ oil condition is adequately accompanied, until reaching the degradation limits, the intervals of oil replacement can be enlarged, meaning that the buses’ availability increases, as well as their corresponding production time. Based on this assumption, a mathematical model to follow and to manage the oil condition is presented, in order to predict the next intervention with the maximum time between them, which means the maximum availability.

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Section: Introductionmentioning

confidence: 99%

Condition Monitoring with Prediction Based on Diesel Engine Oil Analysis: A Case Study for Urban Buses

et al. 2019

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“…As it has been mentioned, those after treatment devices solve some of the emissions problems but compromise certain aspects related to the engine lubrication. The use of EGR lead to higher levels of soot in the engine oil [23,24] while the DPF regeneration process increases the oil degradation due to the raised temperatures inside the cylinder. In addition, the configuration of late fuel injections also tends to worsen the combustion stability and consequently, to increase both the soot levels in the combustion chamber and the fuel dilution in engine oil.…”

Section: Introductionmentioning

confidence: 99%

Study of the influence of emission control strategies on the soot content and fuel dilution in engine oil

Tormos

Novella

Gómez-Soriano

et al. 2019

Tribology International

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The engine oil contamination by both particulate matter (PM) and fuel is becoming an important problem since strategies to control pollutant emissions in internal combustion engines (ICE) significantly increase their presence in engine oil. As a consequence, the engine oil loses its tribological properties compromising engine lubrication and leading to potential problems in engine such as wear, corrosion, etc. For that reason, the study of the oil degradation and contamination due to these strategies have a special interest to the engine manufacturers and engine oil formulators. In this paper, the engine oil soot content and fuel dilution is analysed under real engine conditions. The study is addressed from two different but complementary points of views. First, on-line measurements at several engine operating conditions are performed in order to further understand how the soot generation correlates with the oil soot content and other derived problems on oil performance. Then, experimental data available after the experimental campaign is used to calibrate a numerical model, based on Computational Fluid Dynamics (CFD), that estimate the amount of soot particles settled in the engine oil. Results show that soot particles are more present in oil when operating high load-speed conditions and during the Diesel Particulate Filter (DPF) regeneration cycles. Regarding the fuel dilution, delayed post-injections are critical since they significantly increase the amount of fuel in the engine oil. Numerical results also show the relationships between the soot particles generated during combustion and the amount of soot in engine oil, giving an enhanced comprehension of soot-in-oil deposition mechanisms.

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“…Despite some differences in aggregate size and surface chemistry, Clague et al [34] found that similarities in the nanostructure enabled the surrogacy, at least for diesel soot. Motamen Salehi et al [35] used carbon black as substitute for diesel soot to assess the effect of engine oil pump wear. Studies by Mabuchi et al [36] used an analogous approach to investigate the wear of hydrogen-free diamond-like carbon coatings for engine applications.…”

Section: Introductionmentioning

confidence: 99%

Comparative nanostructure analysis of gasoline turbocharged direct injection and diesel soot-in-oil with carbon black

Pfau

Rocca

Haffner-Staton

et al. 2018

Carbon

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a b s t r a c tTwo gasoline turbocharged direct injection (GTDI) and two diesel soot-in-oil samples were compared with one flame-generated soot sample. High resolution transmission electron microscopy imaging was employed for the initial qualitative assessment of the soot morphology. Carbon black and diesel soot both exhibit core-shell structures, comprising an amorphous core surrounded by graphene layers; only diesel soot has particles with multiple cores. In addition to such particles, GTDI soot also exhibits entirely amorphous structures, of which some contain crystalline particles only a few nanometers in diameter. Subsequent quantification of the nanostructure by fringe analysis indicates differences between the samples in terms of length, tortuosity, and separation of the graphitic fringes. The shortest fringes are exhibited by the GTDI samples, whilst the diesel soot and carbon black fringes are 9.7% and 15.1% longer, respectively. Fringe tortuosity is similar across the internal combustion engine samples, but lower for the carbon black sample. In contrast, fringe separation varies continuously among the samples. Raman spectroscopy further confirms the observed differences. The GTDI soot samples contain the highest fraction of amorphous carbon and defective graphitic structures, followed by diesel soot and carbon black respectively. The A D1 :A G ratios correlate linearly with both the fringe length and fringe separation.

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The effect of soot and diesel contamination on wear and friction of engine oil pump

Cited by 56 publications

References 41 publications

Condition Monitoring with Prediction Based on Diesel Engine Oil Analysis: A Case Study for Urban Buses

Condition Monitoring with Prediction Based on Diesel Engine Oil Analysis: A Case Study for Urban Buses

Study of the influence of emission control strategies on the soot content and fuel dilution in engine oil

Comparative nanostructure analysis of gasoline turbocharged direct injection and diesel soot-in-oil with carbon black

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