An Elastohydrodynamic Cavitation Algorithm for Piston Ring Lubrication

Yang, Qin; Keith, Theo G.

doi:10.1080/10402009508983385

Cited by 28 publications

(23 citation statements)

References 20 publications

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“…Thinner films can lead to metal-to-metal interaction, which can lead to higher friction forces and increased wear. The pressure distribution and the film thickness predicted by the transient Reynolds and steady-state modified Elrod algorithms are similar with the predictions of Yang and Keith [21]. Figure 8.…”

Section: Resultssupporting

confidence: 70%

“…Therefore, the predictions could be easily verified with published results (e.g. Jeng [12], Yang and Keith [21] and Sawicky and Yu [23]). Figure 4 shows piston sliding velocity if the engine operates at 2000 rev/min.…”

Section: Resultssupporting

confidence: 69%

“…Using similar engine parameters, the minimum film thicknesses predicted by other authors are very close to the predictions of the current model: Jeng [12] (Transient Reynolds boundary conditions), Yang and Keith [21] (steady-state modified Elrod using Vijayaraghavan and Keith method [15]) and Sawicky and Yu [23] (steady-state modified Elrod using JFO boundary conditions). There is a direct correlation between film thickness and friction force magnitude.…”

Section: Resultssupporting

confidence: 59%

“…Therefore, as a first approximation, the piston ring-liner conjunction can be viewed as an infinitely long sliding bearing [12,21,30]. Although this assumes uniform radial loading and neglects piston secondary motion as well as ring dynamics, the final results could provide valuable information.…”

Section: Elrod Equationmentioning

confidence: 99%

“…Vijayaraghavan and Keith [15] proposed a finite differenced scheme to predict the pressure distribution along the contact and validated the numerical results with Coyne and Elrod's experiments [20]. Yang and Keith [21] extended this approach to the piston ring lubrication, while Cioc and Keith [22] applied Elrod's algorithm using the Conservation Element (CE) and Solution Element (SE) method. Sawicky and Yu [23] proposed an analytical solution for the piston ring lubrication based solely on the JFO boundary condition.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Cavitation induced starvation for piston-ring/liner tribological conjunction

Chong

Teodorescu

Vaughan

2011

Tribology International

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The study investigates the mechanism of ring-liner lubrication in the vicinity of the top and bottom dead centres of an internal combustion engine. Predicting lubricant transient behaviour is critical when the inlet reversal leads to thin films and inherent metal-to-metal interaction. It was found that the cavitation, which is located at the trailing edge of the contact before reversal, briefly survives after reversal as a confined bubble at the leading edge. This depletes the film promoting starvation. Several algorithms were compared. It is concluded that the lubricant film is thinner than initially thought.Keywords: Piston ring, lubrication, tribology, Elrod cavitation algorithm, cavitation, starvationViscostiy-temperature index (-) T Temperature

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Section: Resultssupporting

confidence: 70%

Section: Resultssupporting

confidence: 69%

Section: Resultssupporting

confidence: 59%

Section: Elrod Equationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cavitation induced starvation for piston-ring/liner tribological conjunction

Chong

Teodorescu

Vaughan

2011

Tribology International

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Research on the influence of the lubrication status at the inlet on the lubrication characteristics of engine piston ring

Sun

Zhu

Wang

et al. 2020

Lubrication Science

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In current researches on the lubrication of engine piston ring, some were based on a hypothesis that the piston ring is on a flooded lubrication status. Although some others belong to the starved lubrication analysis, the onedimensional model, a certain form of starved lubrication status or simplified manner were used. In this paper, on the basis of the equations about the lubricating oil flow-rate and control volume, a flow model of lubricating oil in the piston ring-cylinder liner conjunction is established, and the influence of the situation of supplied lubricating oil film at the piston ring inlet on the twodimensional starved lubrication characteristics of piston ring for a four-stroke engine is studied. The results indicate that the lubrication condition at the piston ring inlet has significant impact on the lubrication characteristics of piston ring. When the supplied lubricating oil at the piston ring inlet increases, the minimum film thickness of piston ring will increase, meanwhile the maximum film pressure, asperity contact force, friction force and power loss will decrease. If the film thickness at the piston ring inlet is smaller, the increase of the supplied film thickness can improve obviously the lubrication characteristics of piston ring.

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A new efficient flow continuity lubrication model for the cylinder liner‐piston ring based on the locally oriented roughness

Chen,

Liu,

2024

Lubrication Science

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The locally oriented roughness is a common feature of surface finished by a machining process, such as the surface of the cylinder liner, and may significantly influence lubrication characteristic. A homogenised transient Reynolds equation for the locally oriented roughness is derived. The Jacobsson–Floberg–Olsson (JFO) boundary conditions was implicitly incorporated into the transient Reynolds equation to ensure the mass flow conservation. On this foundation, a model for the transient lubrication in the cylinder liner‐piston ring considering the effects of the surface roughness and cavitation is established. Then, the results of model developed here are compared with those from the stochastic model by Patir and Cheng. and the effect of the direction of roughness on the lubrication properties is analysed. The homogenised transient Reynolds equation and the lubrication model developed here have great potential for understanding and optimising the transient lubrication considering the surface local roughness orientation, cavitation and starved lubrication.

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An Elastohydrodynamic Cavitation Algorithm for Piston Ring Lubrication

Cited by 28 publications

References 20 publications

Cavitation induced starvation for piston-ring/liner tribological conjunction

Cavitation induced starvation for piston-ring/liner tribological conjunction

Research on the influence of the lubrication status at the inlet on the lubrication characteristics of engine piston ring

A new efficient flow continuity lubrication model for the cylinder liner‐piston ring based on the locally oriented roughness

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