Patterns-Based Coating of Piston Skirt for Added Benefits during Hydrodynamic Lubrication in Internal Combustion Engines

Ali, Usman; Liwicki, Marcus; Almqvist, Andreas; Park, Cheol Woo

doi:10.1007/s12239-022-0096-9

Cited by 1 publication

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, the surface coated with optimized patterns had 7.98 6 0.34% reduced energy loss per engine cycle as compared with the surface coated without a pattern. 19 Asoyan A.R. et al considers the possibility of reducing the wear of piston skirts by reducing the contact surface in conjugation and providing an oil film in the friction zone, regardless of engine operating conditions.…”

Section: Improvement Of Piston Structure Of Internal Combustion Enginementioning

confidence: 99%

Study on lubrication performance of engine piston skirt with bionic design

Bo,

Song,

Weijun

et al. 2023

Advances in Mechanical Engineering

View full text Add to dashboard Cite

As the main friction pair of engine, the friction loss of piston-cylinder liner assembly in the working process has become the main reason of engine friction power consumption. Many species in the biological world have formed non-smooth forms of resistance reduction after thousands of years of survival and evolution. Many people have applied this non-smooth shape of drag reduction on organisms to the surface of friction pairs in construction machinery. Based on LX108 engine, the wear and erosion resistance of Scapharca subcrenata surface is applied to the piston skirt, which is the main friction pair in the engine. Nine test schemes were designed according to orthogonal test. This design selects three factors, namely, groove distribution type, groove depth and width, groove spacing, and each factor includes three levels. The macroscopic fluid lubrication state of the whole piston skirt with bionic shape is studied. Through the change of oil film thickness caused by thermal-mechanical coupling deformation of skirt, combined with the average Reynolds equation, the hydrodynamic pressure of lubricating oil, shear stress, and skirt friction force are obtained to verify the contribution of bionic shape to piston drag reduction, wear reduction, wetting increase, and friction power consumption. The simulation and test results show that the lubrication of all parts of the bionic groove piston skirt is better than that of the standard piston; When the depth and width of groove is 0.8 mm and the spacing is 10°, the thicker the oil film thickness of skirt is; The bionic piston whose oil film bearing area is 74%–87% of the standard piston has the smallest normal pressure and friction; When the upper end of the skirt is arranged with groove shape and the lower end is arranged with narrow groove shape between wide grooves, the lubrication effect is better.

show abstract

Section: Improvement Of Piston Structure Of Internal Combustion Enginementioning

confidence: 99%