Piston ring lubrication theory and experiment




Greater Copenhagen area

A test rig at DTU-Mechanical Engineering has been modified so that oil film thickness can be measured with laser induced fluorescence (LIF). In a two-stroke diesel engine the lubricating oil for the cylinder is injected through the cylinder liner. After injection the piston rings distribute the oil along the liner surface. The lube oil is expensive and it is important to ensure that the injected oil is utilized optimally. If the lube oil accumulates at one end of the liner this indicates that the oil is injected in an in-appropriate manner. 

A numerical model accounting for ring shape, pressure drop across rings, injected amount of oil etc. is used to study the oil distribution.The test rig is used to very the theoretical/numerical findings.

Industrial partner: MAN Diesel and Turbo.

In collaboration with

MAN Diesel and Turbo


Required background 41524 Tribology

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Company / Organization

DTU Mekanik


Peder Klit




Supervisor info

MSc in Engineering, Mechanical Engineering


Peder Klit

ECTS credits

30 - 35


MSc thesis

Technical University of Denmark

For almost two centuries DTU, Technical University of Denmark, has been dedicated to fulfilling the vision of H.C. Ørsted – the father of electromagnetism – who founded the university in 1829 to develop and create value using the natural sciences and the technical sciences to benefit society.

Today, DTU is ranked as one of the foremost technical universities in Europe, continues to set new records in the number of publications, and persistently increases and develops our partnerships with industry, and assignments accomplished by DTU’s public sector consultancy.

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