Abstract
—Hydrodynamic lubrication is simulated under the contact conditions that the direction of contact velocity reverses with a sudden high applied load in the contact of piston top ring and cylinder liner. Hydrodynamic lubrication film formation and pressure between piston ring and cylinder liner at the top dead center (TDC) location are investigated in detail because most friction loss and wear damage happen at this location due to the thin-film thickness resulting from the slow-down and reversal contact velocities as well as high applied load. The surface roughness on the cylinder liner by the honing process that is similar scale to the lubrication film thickness at TDC location is considered. Around the TDC location, laser surface textured (LST) surface that is larger scale than the surface roughness is designed for the favorable film formation. These two surface roughness parameters are simulated to study the effects of favorable film formation and less frictional loss of piston top ring at TDC location where most of damage and friction loss occur. Frictional power loss and minimum film thickness of the cylinder surfaces of the honed roughness are compared with those of patterned designs.
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Abbreviations
- A a :
-
asperity contact area, m2
- c :
-
piston ring profile height, m
- d :
-
depth of LST pattern, m
- F fasp :
-
friction of asperity contact, N
- F fhyd :
-
shear resistance of the hydrodynamic lubrication film, N
- F ring tension :
-
piston ring tension, N
- F 2(χ) :
-
statistical function of the lubricant film ratio
- h(x, y, t):
-
lubrication film thickness, m
- h 0(x, y, t):
-
minimum film thickness, m
- h c(x, y, t):
-
lubrication film thickness by the piston ring profile, m
- h d(x, y, t):
-
lubrication film thickness by the LST geometry, m
- h s(x, y, t):
-
lubrication film thickness by surface roughness, m
- L :
-
length of the LST pattern, m
- L p :
-
pitch of the LST pattern, m
- I pr :
-
width of the piston ring, m
- p hyd :
-
hydrodynamic pressure, Pa
- p asp :
-
asperity contact pressure, Pa
- P c :
-
vapor pressure of the lubricant, Pa
- P comb :
-
combustion pressure, Pa
- R a :
-
surface roughness, m
- R c :
-
radius of the crank shaft rotation, m
- U :
-
sliding velocity, ms−1
- W :
-
width of the LST pattern, m
- W a :
-
asperity contact load, N
- x c :
-
coordinate in the ring profile, m
- x d :
-
coordinate in the LST pattern, m
- x p(θ):
-
piston’s displacement, m
- ẋ p(θ):
-
piston’s velocity, ms−1
- z :
-
asperity height, m
- μ :
-
lubricant viscosity, Pa·s
- ρ :
-
lubricant density, kg·m−3
- θ :
-
volume fraction of the fluid
- β :
-
radius of curvature of an asperity, m
- η :
-
asperity density per unit surface area, m−2
- ρ :
-
average asperity height, m
- τ 0 :
-
limiting Eyring shear stress, Pa
- Ϛ :
-
pressure-induced shear strength of asperities
References
Akalin, O. and Newaz, G. M. (2001). Piston ring-cylinder bore friction modeling in mixed lubrication regime: Part I—Analytical results. J. Tribology 123, 1, 211–218.
Carden, P., Bell, D., Priest, M. and Barrell, D. (2006). Piston assembly friction losses: Comparison of measured and predicted data. SAE Paper No. 2006-01-0426.
Chen, H. and Tian, T. (2008). The influences of cylinder liner honing patterns and oil control ring design parameters on the interaction between the twinland oil control ring and the cylinder liner in internal combustion engines. SAE Paper No. 2008-01-1614.
Checo, H. M., Ausas, R. F., Jai, M., Cadalen, J. P., Choukroun, F. and Buscaglia G. C. (2014). Moving textures: Simulation of a ring sliding on a textured liner. Tribology Int., 72, 131–142.
Chong, W. W. F., Teodorescu, M. and Vaughan, N. D. (2011). Cavitation induced starvation for piston-ring/liner tribological conjunction. Tribology Int. 44, 4, 483–197.
Etsion, I. and Sher, E. (2009). Improving fuel efficiency with laser surface textured piston rings. Tribology Int. 42, 4, 542–547.
Gadeschi, G. B., Backhaus, K. and Knoll, G. (2012). Numerical analysis of laser-textured piston-rings in the hydrodynamic lubrication regime. J Tribology 134, 4, 041702.
Greenwood, J. A. and Tripp, J. H. (1970). The contact of two nominally flat rough surface. Proc. Institution of Mechanical Engineers 185, 1, 625–633.
Hu, Y., Meng, X. and Xie, Y. (2018). A new efficient flow continuity lubrication model for the piston ring-pack with consideration of oil storage of the cross-hatched texture. Tribology Int., 119, 443–463.
Jocsak, J., Li, Y., Tian, T. and Wong, V. W. (2006). Modeling and optimizing honing texture for reduced friction in internal combustion engines. SAE Trans., 335–347.
Knopf, M., Eiglmeier, C. and Merker, G. P. (1998). Calculation of unsteady hydrodynamic lubrication and surface contact at the piston-ring/cylinder-liner interface. SAE Paper No. 981402.
Kong, J. and Jang, S. (2020). Temperature analysis of wet clutch surfaces during clutch engagement processes based on friction pad patterns. Int. J. Automotive Technology 21, 4, 813–822.
Krupka, I., Hartl, M., Zimmerman, M., Houska, P. and Jang, S. (2011). Effect of surface texturing on elastohydrodynamically lubricated contact under transient speed conditions. Tribology Int. 44, 10, 1144–1150.
Li, Y., Chen, H. and Tian, T. (2008). A deterministic model for lubricant transport within complex geometry under sliding contact and its application in the interaction between the oil control ring and rough liner in internal combustion engines. SAE Paper No. 2008-01-1615.
Liu, C., Lu, Y., Zhang, Y., Li, S., Kang, J. and Müller, N. (2019). Numerical study on the tribological performance of ring/liner system with consideration of oil transport. J. Tribology 141, 1, 011701.
Ma, M. T., Sherrington, I. and Smith, E. H. (1996). Implementation of an algorithm to model the starved lubrication of a piston ring in distorted bores: Prediction of oil flow and onset of gas blow-by. J. Engineering Tribology 210, 1, 29–44.
Mezghani, S., Demirci, I., Yousfi, M. and El Mansori, M. (2013). Mutual influence of crosshatch angle and superficial roughness of honed surfaces on friction in ring-pack tribo-system. Tribology Int., 66, 54–59.
Morris, N., Rahmani, R., Rahnejat, H., King, P. D. and Howell-Smith, S. (2016). A numerical model to study the role of surface textures at top dead center reversal in the piston ring to cylinder liner contact. J. Tribology 138, 2, 021703.
Patir, N. and Cheng, H. S. (1979). Application of average flow model to lubrication between rough sliding surfaces. J Tribology 101, 2, 220–229.
Turnbull, R., Dolatabadi, N., Rahmani, R. and Rahnejat, H. (2020). An assessment of gas power leakage and frictional losses from the top compression ring of internal combustion engines. Tribology Int., 142, 105991.
Usman, A. and Park, C. W. (2017). Numerical investigation of tribological performance in mixed lubrication of textured piston ring-liner conjunction with a non-circular cylinder bore. Tribology Int., 105, 148–157.
Vlădescu, S., Olver, A., Pegg, I. and Reddyhoff, T. (2015). The effects of surface texture in reciprocating contacts — An experimental study. Tribology Int., 82, 28–12.
Vlădescu, S. C., Ciniero, A., Tufail, K., Gangopadhyay, A. and Reddyhoff, T. (2017), Looking into a laser textured piston ring-liner contact. Tribology Int., 115, 140–153.
Zhan, J. and Yan, M. (2012). Investigation on dimples distribution angle in laser texturing of cylinder—piston ring system. Tribology Trans. 55, 5, 693–697.
Acknowledgement
This work was supported by the Basic Science Program through the National Research Foundation (NRF), Grant No.: 2018R1D1A1B07043950 & BK21(5199990814084).
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Jang, S. Computational Study on the Frictional Power Loss Reduction of Piston Ring with Laser Surface Texturing on the Cylinder Liner. Int.J Automot. Technol. 23, 855–865 (2022). https://doi.org/10.1007/s12239-022-0076-0
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DOI: https://doi.org/10.1007/s12239-022-0076-0