Effect of Worn Top Compression Ring and Lubricant Degradation Towards Engine In-Cylinder Frictional Losses
Friction occurs in the internal combustion engine especially at the interface between piston ring and cylinder liner. This causes an increase in fuel consumption required to overcome these frictional losses. Piston ringcylinder interface is one of the primary sources. This study is imperative t...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Penerbit UTM Press
2025
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/48691/1/3_244_%2816-23%29%20%281%29.pdf http://ir.unimas.my/id/eprint/48691/ https://jtse.utm.my/index.php/jtse/article/view/244 https://doi.org/10.11113/jtse.v12.244 |
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| Summary: | Friction occurs in the internal combustion
engine especially at the interface between
piston ring and cylinder liner. This causes an
increase in fuel consumption required to
overcome these frictional losses. Piston ringcylinder interface is one of the primary sources.
This study is imperative to understand the
effects of lubrication degradation and worn top
compression ring towards engine frictional
losses. A mathematical model with the
integration of 1-D Reynold’s equation is derived
to investigate the lubrication film and pressure
generation. This study further incorporates
velocity, surface roughness, combustion
pressure, lubrication degradation and presence
of worn top compression ring to demonstrate
the frictional losses. It was found that
lubrication degradation significantly affects the
lubrication film formation, impacting friction at
the piston ring-cylinder liner interface.
Increased lubricant viscosity increases viscous
friction while reducing boundary friction.
Similarly, a worn top compression ring leads to
higher viscous friction due to a thicker film and
larger load-bearing area, decreasing boundary
friction. It is concluded that both lubrication
degradation and worn top compression rings
have detrimental effects on frictional power
losses |
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