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Tribology on Piston Operations

Friction loss accounts for approximately 10% of total energy in fuel for a diesel engine [1]. 40-55% of the
friction loss comes from the power cylinder system. The loss of energy from friction can be diminished
with better understanding of the tribological interactions occurring in the power cylinder system.

A significant portion of the friction loss in the power cylinder system stems from the contact between
the piston skirt and the cylinder liner. The interaction between the piston skirt, lubricant, and cylinder
interfaces is quite complex due to the constant changes in force, temperature, and speed in a real life
engine. Optimizing each factor is key to obtaining optimal engine performance. This study will focus on
replicating the mechanisms causing friction forces and wear at the piston skirt-lubricant-cylinder liner
(P-L-C) interfaces.

Click to Learn about Piston Tribology!

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