Fast Analysis of Crankshaft Bearings with a Database Including Shear Thinning and Viscoelastic Effects

Zhang, Chao; Zhang, Husheng; Qiu, Zugan

doi:10.1080/10402009908982303

Cited by 12 publications

(3 citation statements)

References 9 publications

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“…Table 5 gives another check for the correctness of the algorithm and the computer program by comparing the predicted values of the minimum oil film thickness and maximum film pressure with some results from the literature for both grooved (full circumferential groove) and ungrooved connecting-rod bearings [31][32][33][34][35].…”

Section: Validationmentioning

confidence: 99%

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Analysis of couple-stresses and piezo-viscous effects in a layered connecting-rod bearing

Laouadi

Lahmar

Bou‐Saïd

et al. 2018

Mechanics & Industry

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In this work, the combined effects of couple-stresses and piezo-viscosity on the dynamic behavior of a compression ignition engine big-end connecting-rod bearing with elastic layer are investigated using the V. K. Stokes micro-continuum theory. It is assumed that the journal (crankpin) is rigid and the big-end bearing consists of a thin compressible elastic liner fixed in an infinitely stiff housing. The governing Reynolds' equation and the viscous dissipation term appearing on the RHS of energy equation are modified using the V. K. Stokes micro-continuum theory. The non-Newtonian effect is introduced by a new material constant η, which is responsible for couple-stress property, and the piezo-viscosity effect by the pressure–viscosity coefficient α appearing in the well-known Barus' law. In the proposed model, the nonlinear transient modified Reynolds equation is discretized by the finite difference method, and the resulting system of algebraic equations is solved by means of the subrelaxed successive substitutions method to obtain the fluid-film pressure field as well as the film thickness distribution. The crankpin center trajectories for a given load diagram are determined iteratively by solving the nonlinear equilibrium equations of the journal bearing system with the improved and damped Newton–Raphson method for each time step or crankshaft rotation angle. According to the obtained results, the effects of couple-stresses and piezo-viscosity on the nonlinear dynamic behavior of dynamically loaded bearings with either stiff or compliant liners are significant and cannot be overlooked.

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Section: Validationmentioning

confidence: 99%

“…Note that the discrepancies between the results may be caused partly by the effect of supply pressure. Indeed, our calculations were performed for the grooved bearing configuration by setting the supply pressure in the feeding groove at zero instead of p s = 0.294 MPa as stated in reference [35].…”

Section: Validationmentioning

confidence: 99%

Analysis of couple-stresses and piezo-viscous effects in a layered connecting-rod bearing

Laouadi

Lahmar

Bou‐Saïd

et al. 2018

Mechanics & Industry

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show abstract

“…The good lubrication performance of crankshaft bearing is very important to achieve the reliable operation of internal combustion engine. Currently, more and more actual influence factors being considered, so many important achievements have been gotten in the lubrication analysis of crankshaft bearing for internal combustion engine (Zhang, 1999;Kim, 2001;Lahmar, 2002;Manoharan et al, 2004;Hirani et al, 1998). However, because of its inherent complexity, there are still problems waiting to be solved in order to obtain the better understanding prediction for the lubrication performance of crankshaft bearing.…”

Section: Introductionmentioning

confidence: 99%

On the elastohydrodynamic lubrication performance of crankshaft bearing based on the effect of whole engine block deformation

Sun

Cai

Liu

2012

Industrial Lubrication and Tribology

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Purpose -The elastic deformation of crankshaft bearing surface will be caused when acted by oil film pressure, which will affect the lubrication performance of crankshaft bearing. The model of the single bearing housing was usually used in the calculation of the elastic deformation of bearing surface. In actual internal combustion engine, the main bearing housing is combined together with engine block; deformation of the main bearing surface will be affected by deformation of the engine block. The purpose of this paper is to investigate the effect of deformation of the whole engine block on the hydrodynamic lubrication performance of main bearings. Design/methodology/approach -The loads of main bearings were calculated by the whole crankshaft beam-element finite element method. The lubrication of crankshaft bearings was analyzed by dynamic method. The elastic deformations of bearing surface under oil film pressure were calculated by compliance matrix method. The compliance matrix was established by finite element analysis. Findings -It may be not necessary to consider the effect of elastic deformation of bearing surface under film pressure in the lubrication analyses of main bearings for internal combustion engine when the very high calculating accuracy is not required. Originality/value -The elastohydrodynamic lubrications of crankshaft bearings considering the deformation of engine block were analyzed for the main bearings of an engine. Till now, whether or not the complicated model of the whole cylinder block should be considered to calculate the elastic deformation of main bearing surface in the lubrication analyses of crankshaft main bearings has not been done.

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Scuffing Behavior of Piston-Pin/Bore Bearing in Mixed Lubrication

Zhang

2022

Advances in Engine and Powertrain Research and Technology

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Fast Analysis of Crankshaft Bearings with a Database Including Shear Thinning and Viscoelastic Effects

Cited by 12 publications

References 9 publications

Analysis of couple-stresses and piezo-viscous effects in a layered connecting-rod bearing

Analysis of couple-stresses and piezo-viscous effects in a layered connecting-rod bearing

On the elastohydrodynamic lubrication performance of crankshaft bearing based on the effect of whole engine block deformation

Scuffing Behavior of Piston-Pin/Bore Bearing in Mixed Lubrication

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