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Towards a Model for Engine Oil Hydrocarbon Particulate Matter: SAE paper number 2010-01-2098
Scania CV.
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Tribologi.ORCID iD: 0000-0003-2489-0688
2010 (English)Conference paper (Refereed)
Abstract [en]

The drive to reduce particle emissions from heavy-duty diesel engines has reached the stage where the contribution from the lubricant can have a major impact on the total amount of particulate matter (PM).

This paper proposes a model to predict the survival rate (unburnt oil divided by oil consumption) of the hydrocarbons from the lubricant consumed in the cylinder. The input data are oil consumption and cylinder temperature versus crank angle.

The proposed model was tuned to correlate well with data from a six-cylinder heavy-duty diesel engine that meets the Euro 5 legislation without exhaust gas aftertreatment.

The measured (and modelled) oil survival shows a strong correlation with engine power. The maximum oil survival rate measured (19%) was at motoring conditions at high speed. For this engine, loads above 100 kW yielded an oil survival rate of nearly zero.

Place, publisher, year, edition, pages
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-25866DOI: 10.4271/2010-01-2098ScopusID: 2-s2.0-79959516712OAI: diva2:360374
QC 20101103Available from: 2010-11-03 Created: 2010-11-03 Last updated: 2011-12-15Bibliographically approved
In thesis
1. Particulate Emissions Associated with Diesel Engine Oil Consumption
Open this publication in new window or tab >>Particulate Emissions Associated with Diesel Engine Oil Consumption
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Particulate emissions from diesel engines have been a key issue for diesel engine developers in recent decades. Their work has succeeded in reducing the exhaust particles from the combustion of fuel, which has led to increasing interest in the contribution of particulates from lubrication oil.

When discussing oil-related particulate emissions, hydrocarbon particles are customarily referred to. This thesis uses a broader definition, in which oil-related particulate emissions are modelled not only by the hydrocarbons, but also include the ash, carbons, and sulphate oil particulate emissions.

The model developed in the project uses input data as oil consumption and oil ash content combined with tuning parameters, such as the oil ash transfer rate (ash emissions divided by oil consumption and oil ash content). Controlled engine tests have been performed to verify assumptions and fill knowledge gaps. The model can be applied to a variety of diesel engines, although the tuning factors might have to be reset. For example, introducing diesel particulate filters would dramatically reduce the oil ash emissions, since oil ash would accumulate in the filter.

Oil consumption has played a central role in the present research. The modelling results indicate that special attention should be paid to oil consumption under running conditions with a low in-cylinder temperature, since the oil survival rate is high there.

Under low-load and motoring conditions, hydrocarbons proved to be the main contributor to oil-related particulate emissions. At high engine load, oil ash emissions were the largest contributor to oil-related particulate emissions.

Place, publisher, year, edition, pages
Stockholm: KTH, 2010. 26 p.
Trita-MMK, ISSN 1400-1179 ; 2010:09
Lubrication oil, Particulate emission, Particulate matter (PM), Oil consumption, Diesel engine
urn:nbn:se:kth:diva-25880 (URN)978-91-7415-759-8 (ISBN)
Public defence
2010-11-26, Sal F3, Lindstedtsvägen 26, KTH, Stockholm, 10:15 (English)
QC 20101103Available from: 2010-11-03 Created: 2010-11-03 Last updated: 2010-11-03Bibliographically approved

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