Incorporation of deformation in a lubrication analysis for automotive piston skirt–liner system

Ning, Lipu; Meng, Xianghui; Xie, Youbai

doi:10.1177/1350650112466768

Cited by 19 publications

(14 citation statements)

References 34 publications

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“…Zhu et al, 7 Wong et al, 8 and Liu et al 9 established a more sophisticated model using the average flow model 10,11 to consider the influences of surface roughness and waviness in the piston skirt-liner system. In recent years, more piston parameters and influencing factors related to the tribo-dynamic behavior of the piston skirt have been investigated, 12–20 such as the piston skirt profile, the elastic deformation of the piston skirt and the liner, the cylinder liner vibration, and the connecting rod’s inertial parameters. Meng and Xie 21 presented a new tribo-dynamic model for the piston skirt-liner system in high-speed four-stroke engines by considering the effects of connecting rod inertia.…”

Section: Introductionmentioning

confidence: 99%

A new comprehensive tribo-dynamic analysis for lubricated translational joints in low-speed two-stroke marine engines

Meng

et al. 2019

International Journal of Engine Research

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In low-speed two-stroke marine engines, the effect of connecting rod inertia is important for the tribo-dynamics of crosshead slipper-guide and piston skirt-liner. However, this has not been considered in previous research. Therefore, a new tribo-dynamic model that considers the connecting rod inertia is presented for the two lubricated translational joints, and the lubricant viscosity–temperature properties are accurately incorporated into the model. The modified extended backward differentiation formulate method is used to solve the nonlinear stiff differential equations effectively. The simulation results show that the effect of connecting rod inertia on the dynamic characteristics of two translational joints is mainly observed during the latter half of the upward stroke. For the crosshead slipper, the amplitude of the transverse velocity is increased by 30% at a crank angle of approximately 300° compared to the early model that ignored the connecting rod inertia. With the increase of the connecting rod mass, the secondary motions of both the crosshead slipper and the piston skirt are increased. Furthermore, a decrease of the connecting rod mass can reduce the friction losses of the engine.

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Section: Introductionmentioning

confidence: 99%

A new comprehensive tribo-dynamic analysis for lubricated translational joints in low-speed two-stroke marine engines

Meng

et al. 2019

International Journal of Engine Research

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“…The influence of the heat transfer and solids-induced thermal elastic deformation on the piston skirt-cylinder lubricating interface behavior was analyzed. Ning et al [27] built a comprehensive lubrication model of the piston skirt-liner system. By considering the thermal and the elastic deformations of the piston skirt and the cylinder liner, the piston secondary motion was investigated.…”

Section: Introductionmentioning

confidence: 99%

The Analysis of Secondary Motion and Lubrication Performance of Piston considering the Piston Skirt Profile

Lü

Wang

et al. 2018

Shock and Vibration

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The work performance of piston-cylinder liner system is affected by the lubrication condition and the secondary motion of the piston. Therefore, more and more attention has been paid to the secondary motion and lubrication of the piston. In this paper, the Jakobson-Floberg-Olsson (JFO) boundary condition is employed to describe the rupture and reformation of oil film. The average Reynolds equation of skirt lubrication is solved by the finite difference method (FDM). The secondary motion of pistonconnecting rod system is modeled; the trajectory of the piston is calculated by the Runge-Kutta method. By considering the inertia of the connecting rod, the influence of the longitudinal and horizontal profiles of piston skirt, the offset of the piston pin, and the thermal deformation on the secondary motion and lubrication performance is investigated. The parabolic longitudinal profile, the smaller top radial reduction and ellipticities of the middle-convex piston, and the bigger bottom radial reduction and ellipticities can effectively reduce the secondary displacement and velocity, the skirt thrust, friction, and the friction power loss. The results show that the connecting rod inertia, piston skirt profile, and thermal deformation have important influence on secondary motion and lubrication performance of the piston.

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“…Therefore, the adequate selection of lubricant is of prime importance. 81,82 Offner presented a numerical method that incorporates the overall flexible body system, lubricant properties and detailed properties of the contact mechanisms.…”

Section: Boundary and Mixed Lubricationmentioning

confidence: 99%

Piston dynamics, lubrication and tribological performance evaluation: A review

Delprete

Razavykia

2018

International Journal of Engine Research

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Mechanical power loss of lubricated and bearing surfaces serves as an attractive domain for study and research in the field of internal combustion engines. Friction reduction at lubricated and bearing surface is one of the most cost-effective ways to reduce gas emission and improve internal combustion engines’ efficiency. This thus motivates automotive industries and researchers to investigate tribological performance of internal combustion engines. Piston secondary motion has prime importance in internal combustion engines and occurs due to unbalanced forces and moments in a plane normal to the wrist pin axis. Consequently, piston executes small translations and rotations within the defined clearance during the piston reciprocating motion. Mechanical friction power loss and lubrication at piston skirt/liner and radiated engine noise are dramatically affected by piston secondary dynamics. The lubrication mechanism, piston secondary motion and tribological performance are affected by piston design parameters (piston/liner clearance, wrist pin offset, skirt profile, etc.), lubricant rheology, oil transport mechanism and operating conditions. Therefore, this review is devoted to summarize the synthesis of main technical aspects, research efforts, conclusions and challenges that must be highlighted regarding piston skirt/liner lubrication and piston dynamics and slap.

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Incorporation of deformation in a lubrication analysis for automotive piston skirt–liner system

Cited by 19 publications

References 34 publications

A new comprehensive tribo-dynamic analysis for lubricated translational joints in low-speed two-stroke marine engines

A new comprehensive tribo-dynamic analysis for lubricated translational joints in low-speed two-stroke marine engines

The Analysis of Secondary Motion and Lubrication Performance of Piston considering the Piston Skirt Profile

Piston dynamics, lubrication and tribological performance evaluation: A review

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