Dynamic analysis of friction and wear in forged steel piston for a diesel engine
SUN Chenyuan
CAO Guoshuai
LI Bin
FENG Xiaojing
YUAN Wentao
Abstract：To address the friction and wear issues of the second land of a forged steel piston in a diesel engine,various pin bore offset solutions,and second land profile solutions are designed under the constraint of maintaining piston rigidity.Dynamic analysis software is used to simulate and study the maximum tilt angle,impact kinetic energy,peak contact pressure,cumulative wear load,blow-by,and oil consumption for different solutions.The simulation results indicate that a 0.5 mm pin bore offset toward the major thrust side,combined with a convex cylindrical profile for the second land,the contact pressure and cumulative wear load are minimized,while keeping blow-by gas and oil consumption within design tolerances.Bench tests verify that the wear of the second land under this optimized solution is approximately 0.027 mm,which meets the engine's durability requirements.
Keywords：pistonwearfinite element analysisdynamic analysisprofilepin bore offset
Publication Date：2025-05-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 50-55 )