Optimizing the Parameters of the Partial Textures of the Crankpin
Bearing to Enhance the Lubrication Performance of an Engine 03-15-05-0040
This also appears in
SAE International Journal of Engines-V131-3EJ
To enhance the lubrication performance of the crankpin bearing (CB) at the
elastic hydrodynamic lubrication regime (EHLR), the spherical dimples (SD) of
the partial textures (PT) is designed on the EHLR of the CB. Based on a
hydrodynamic model of the slider-crank mechanism (SCM) combined with the CB
lubrication and a multi-objective optimization program of the genetic algorithm
(MOGA), the initial design parameters of PT including the depth
hsij and the diameter Dij of each SD defined as chromosomes in the MOGA are then optimized to
further enhance the CB’s lubrication performance. Three indexes of the oil film
pressure p, friction force Ff, and friction coefficient μ of the CB are chosen
as the objective functions. The research results indicate that based on the
optimal approach of the MOGA with its good stability and repeatability, the CB’s
lubrication performance is remarkably improved by the optimal parameters in
comparison with the initial parameters of the SD. Particularly, at the EHLR of
the CB, both the maximum values of the p and Ff are significantly reduced by 7.7% and 14.6% compared to the initial
parameters of the PT; and by 8.6% and 19.9% in comparison with the initial
parameters of the full textures (FT) designed on the bearing surface. Thus the
application of the MOGA to optimize the SD design parameters can better improve
the lubrication performance and durability of the CB of an engine.
Citation: Zhang, B., Ren, G., Nguyen, V., Wang, Y. et al., "Optimizing the Parameters of the Partial Textures of the Crankpin Bearing to Enhance the Lubrication Performance of an Engine," SAE Int. J. Engines 15(5):743-754, 2022, https://doi.org/10.4271/03-15-05-0040. Download Citation