The Pivotal Role of Crankcase Oil in Preventing Soot Wear and Extending Filter Life in Low Emission Diesel Engines

Geehan, J. A. Mc; Alexander, W. R.; Ziemer, J. N.; Roby, S. H.; Graham, John

doi:10.4271/1999-01-1525

Cited by 23 publications

(2 citation statements)

References 31 publications

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“…A previous study of diesel engine oils suggested that considerable gelation may form above -5°C [18,19] and this present study further supports those observations.…”

Section: Discussionsupporting

confidence: 92%

Thermal History of the Engine Oil and Its Effects on Low-Temperature Pumpability and Gelation Formation

Selby

Miiller²

2008

SAE Technical Paper Series

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Low-temperature engine oil pumpability has been a concern for OEMs, engine oil formulators, and additive manufacturers for a number of years particularly since a significant number of air-binding failures in 1980 and '81. On careful investigation of the cause of such field failures, it was found that oil sensitivity to a particular combination of weather conditions was responsible. The experience also suggested that many other lowtemperature weather conditions might produce enginedamaging gelation. Thus, it seemed desirable to develop a bench test that would induce and measure gelation that might form in engine oil by continuously measuring slowly cooling oil over an extensive lowtemperature range. This led to the development of the Scanning Brookfield Technique (SBT) first reported in 1982. Oil supply lines to Atmospheric Pressure 3 Oil pump Oil in sump valve-train and crankshaft 'Air-Binding' Process Oil Screen

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“…A previous study of diesel engine oils suggested that considerable gelation may form above -5°C [18,19] and this present study further supports those observations.…”

Section: Discussionsupporting

confidence: 92%

Thermal History of the Engine Oil and Its Effects on Low-Temperature Pumpability and Gelation Formation

Selby

Miiller²

2008

SAE Technical Paper Series

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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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Lubricants for Internal Combustion Engines

Harperscheid¹,

Omeis²

2006

Lubricants and Lubrication

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The Pivotal Role of Crankcase Oil in Preventing Soot Wear and Extending Filter Life in Low Emission Diesel Engines

Cited by 23 publications

References 31 publications

Thermal History of the Engine Oil and Its Effects on Low-Temperature Pumpability and Gelation Formation

Thermal History of the Engine Oil and Its Effects on Low-Temperature Pumpability and Gelation Formation

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

Lubricants for Internal Combustion Engines

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