There are increasing pressures upon the automotive industry to reduce harmful emissions as well as meeting the key objective of enhanced fuel efficiency, while improving or retaining the engine output power. The losses in an internal combustion (IC) engine can be divided into thermal and parasitic as well as due to gas leakage because of untoward compression ring motions. Frictional losses are particularly of concern at low engine speeds, assuming a greater share of the overall losses. Piston–cylinder system accounts for nearly half of all the frictional losses. Loss of sealing functionality of the ring pack can also contribute significantly to power losses as well as exacerbating harmful emissions. The dynamics of compression ring is inexorably linked to its tribological performance, a link which has not been made in many reported analyses. A fundamental understanding of the interplay between the top compression ring three-dimensional elastodynamic behavior, its sealing function and contribution to the overall frictional losses is long overdue. This paper provides a comprehensive integrated transient elastotribodynamic analysis of the compression ring to cylinder liner and its retaining piston groove lands' conjunctions, an approach not hitherto reported in the literature. The methodology presented aims to aid the piston ring design evaluation processes. Realistic engine running conditions are used which constitute international drive cycle testing conditions.
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June 2017
Research-Article
On the Transient Three-Dimensional Tribodynamics of Internal Combustion Engine Top Compression Ring
C. Baker,
C. Baker
Wolfson School of Mechanical, Electrical
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: christopher_baker@outlook.com
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: christopher_baker@outlook.com
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S. Theodossiades,
S. Theodossiades
Wolfson School of Mechanical, Electrical
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: S.Theodossiades@lboro.ac.uk
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: S.Theodossiades@lboro.ac.uk
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R. Rahmani,
R. Rahmani
Wolfson School of Mechanical, Electrical
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: R.Rahmani@lboro.ac.uk
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: R.Rahmani@lboro.ac.uk
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H. Rahnejat,
H. Rahnejat
Wolfson School of Mechanical, Electrical
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: H.Rahnejat@lboro.ac.uk
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: H.Rahnejat@lboro.ac.uk
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B. Fitzsimons
B. Fitzsimons
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C. Baker
Wolfson School of Mechanical, Electrical
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: christopher_baker@outlook.com
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: christopher_baker@outlook.com
S. Theodossiades
Wolfson School of Mechanical, Electrical
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: S.Theodossiades@lboro.ac.uk
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: S.Theodossiades@lboro.ac.uk
R. Rahmani
Wolfson School of Mechanical, Electrical
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: R.Rahmani@lboro.ac.uk
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: R.Rahmani@lboro.ac.uk
H. Rahnejat
Wolfson School of Mechanical, Electrical
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: H.Rahnejat@lboro.ac.uk
and Manufacturing Engineering,
Loughborough University,
Loughborough LE11 3TU, UK
e-mail: H.Rahnejat@lboro.ac.uk
B. Fitzsimons
1Corresponding author.
Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received June 15, 2016; final manuscript received October 12, 2016; published online January 24, 2017. Assoc. Editor: Stani Bohac.
J. Eng. Gas Turbines Power. Jun 2017, 139(6): 062801 (12 pages)
Published Online: January 24, 2017
Article history
Received:
June 15, 2016
Revised:
October 12, 2016
Citation
Baker, C., Theodossiades, S., Rahmani, R., Rahnejat, H., and Fitzsimons, B. (January 24, 2017). "On the Transient Three-Dimensional Tribodynamics of Internal Combustion Engine Top Compression Ring." ASME. J. Eng. Gas Turbines Power. June 2017; 139(6): 062801. https://doi.org/10.1115/1.4035282
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