New Device for the Measurement of Piston Frictional Forces in Small Engines

Furuhama, Shoichi; Sasaki, Shin‐ichi

doi:10.4271/831284

Cited by 86 publications

(74 citation statements)

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“…However, the important effect of friction generated heat on lubricant effective viscosity and thermal distortion of the bore and ring are acknowledged, both of which motivate future developments of the model. The current model is validated against measurements of friction by other research workers [13], showing good conformance.…”

Section: Introductionmentioning

confidence: 99%

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Tribology of the ring—bore conjunction subject to a mixed regime of lubrication

Mishra

Rahnejat

King

2008

Proceedings of the Institution of Mechanical Engineers, Part C:

112

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This paper provides a detailed analysis of the compression ring—bore/liner conjunction. The analysis includes ring—bore conformability and global in-plane deformation of ring fitted in situ. The analysis for fitted ring in an out-of-round bore shows very good agreement with precise measurements, using a coordinate measuring machine. The analysis also includes the lubricated conjunction under a transient regime of lubrication, taking into account combined elastohydrodynamics and asperity interactions. The transient nature of the tribological conjunction has been demonstrated, particularly the prevalent mixed/boundary regime of lubrication at the top and bottom dead centres. The analysis is applied to a high performance motorbike engine subjected to very high impact loads and engine speeds of the order of 13 000 r/min. Furthermore, the predictions of the model show good conformance to the measurements of friction reported by other research workers.

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Section: Introductionmentioning

confidence: 99%

“…It is very important to accurately replicate ring geometry in tribological studies, discussed [10], who presented the profile of a compression ring used for assessment of friction by Furuhama and Sasaki [13] using a floating liner. The approximated profile was based on its outer machined surface.…”

Section: Ring-bore Conformabilitymentioning

confidence: 99%

Tribology of the ring—bore conjunction subject to a mixed regime of lubrication

Mishra

Rahnejat

King

2008

Proceedings of the Institution of Mechanical Engineers, Part C:

112

View full text Add to dashboard Cite

show abstract

“…Mishra et al [20] used Greenwood and Tripp's [21] method, together with measurements of a real out-of-round cylinder bore, to perform a tribological analysis of the compression ring-bore contact. Reasonable agreement was noted with the experimental data presented by Furuhama and Sasaki [22], as well as previous numerical analysis by Akalin and Newaz [23]. Baker et al [24,25] presented a methodology, which coupled a verified in-plane dynamic response with the tribological analysis of the piston ring-cylinder liner conjunction.…”

Section: Effect Of Compression Ring Elastodynamics Behaviour Upon Blomentioning

confidence: 48%

Effect of Compression Ring Elastodynamics Behaviour upon Blowby and Power Loss

Baker¹,

Rahmani²,

Karagiannis³

et al. 2014

SAE Technical Paper Series

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“…Another similar modelling was done by Mishra et al [16] found that at TDC and BDC has the least oil film thickness and highest friction was found at TDC. The model was validated with experimental results obtained from Furuhama and Sasaki [17]. Bolander et al [18] in his study of transition of lubrication regime in the piston ring-Liner surface found that at Dead centres, mostly boundary lubrication is present and asperityasperity contact is there at TDC.…”

Section: Top Ring Reversal Bore Wearmentioning

confidence: 62%