An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations
The friction pair of piston rings and cylinder liner is one of the most important friction couplings in an internal combustion engine. It influences engine efficiency and service life. Under the excitation of piston slaps, the dynamic deformation of cylinder liner is close to the surface roughness m...
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| Format: | Article |
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MDPI AG
2017-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/10/12/2122 |
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| author | Guoxing Li Fengshou Gu Tie Wang Xingchen Lu Li Zhang Chunfeng Zhang Andrew Ball |
| author_facet | Guoxing Li Fengshou Gu Tie Wang Xingchen Lu Li Zhang Chunfeng Zhang Andrew Ball |
| author_sort | Guoxing Li |
| collection | DOAJ |
| description | The friction pair of piston rings and cylinder liner is one of the most important friction couplings in an internal combustion engine. It influences engine efficiency and service life. Under the excitation of piston slaps, the dynamic deformation of cylinder liner is close to the surface roughness magnitudes, which can affect the friction and lubrication performance between the piston rings and cylinder assemblies. To investigate the potential influences of structural deformations to tribological behaviours of cylinder assemblies, the dynamic deformation of the inner surface due to pistons slaps is obtained by dynamic simulations, and then coupled into an improved lubrication model. Different from the traditional lubrication model which takes the pressure stress factor and shear stress factor to be constant, the model proposed in this paper calculated these factors in real time using numerical integration to achieve a more realistic simulation. Based on the improved piston rings and cylinder liner lubrication model, the minimum oil film thickness and friction force curves are obtained for an entire work cycle. It shows that the friction force obtained from the improved model manifests clear oscillations in each stoke, which is different from the smoothed profiles predicted traditionally. Moreover, the average amplitude of the friction forces also shows clear reduction. |
| first_indexed | 2024-04-14T06:56:52Z |
| format | Article |
| id | doaj.art-37a3ad0cb795438d944e694be4b386da |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T06:56:52Z |
| publishDate | 2017-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-37a3ad0cb795438d944e694be4b386da2022-12-22T02:06:51ZengMDPI AGEnergies1996-10732017-12-011012212210.3390/en10122122en10122122An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic DeformationsGuoxing Li0Fengshou Gu1Tie Wang2Xingchen Lu3Li Zhang4Chunfeng Zhang5Andrew Ball6Department of Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaDepartment of Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaDepartment of Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaDepartment of Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaShanxi Lu’an Taihang Lubricant Co., Ltd., Changzhi 046204, ChinaShanxi Lu’an Taihang Lubricant Co., Ltd., Changzhi 046204, ChinaCentre for Efficiency and Performance Engineering, University of Huddersfield, Huddersfield HD1 3DH, UKThe friction pair of piston rings and cylinder liner is one of the most important friction couplings in an internal combustion engine. It influences engine efficiency and service life. Under the excitation of piston slaps, the dynamic deformation of cylinder liner is close to the surface roughness magnitudes, which can affect the friction and lubrication performance between the piston rings and cylinder assemblies. To investigate the potential influences of structural deformations to tribological behaviours of cylinder assemblies, the dynamic deformation of the inner surface due to pistons slaps is obtained by dynamic simulations, and then coupled into an improved lubrication model. Different from the traditional lubrication model which takes the pressure stress factor and shear stress factor to be constant, the model proposed in this paper calculated these factors in real time using numerical integration to achieve a more realistic simulation. Based on the improved piston rings and cylinder liner lubrication model, the minimum oil film thickness and friction force curves are obtained for an entire work cycle. It shows that the friction force obtained from the improved model manifests clear oscillations in each stoke, which is different from the smoothed profiles predicted traditionally. Moreover, the average amplitude of the friction forces also shows clear reduction.https://www.mdpi.com/1996-1073/10/12/2122dynamic deformationlubrication modelpiston ringcylinder linerfriction force |
| spellingShingle | Guoxing Li Fengshou Gu Tie Wang Xingchen Lu Li Zhang Chunfeng Zhang Andrew Ball An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations Energies dynamic deformation lubrication model piston ring cylinder liner friction force |
| title | An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations |
| title_full | An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations |
| title_fullStr | An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations |
| title_full_unstemmed | An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations |
| title_short | An Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations |
| title_sort | improved lubrication model between piston rings and cylinder liners with consideration of liner dynamic deformations |
| topic | dynamic deformation lubrication model piston ring cylinder liner friction force |
| url | https://www.mdpi.com/1996-1073/10/12/2122 |
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