The influence of lubricant degradation on measured piston ring film thickness in a fired gasoline reciprocating engine

Notay, R.S.; Priest, Martin; Fox, Miles

doi:10.1016/j.triboint.2018.07.002

Cited by 28 publications

(20 citation statements)

References 52 publications

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“…We used a 2-D approach in which the ring and liner lubrication parameters are determined as a function of piston position, and the Reynolds equation is thus reduced to a 1-D form. Based on these conditions, the Reynolds equation becomes [12][13][14]:…”

Section: Reynolds Equationmentioning

confidence: 99%

Parametric Analysis of the Effect of Engine Speed and Load on the Hydrodynamic Performance of the Lubricant in Diesel Engine

Menacer

Bouchetara²

2020

Period. Polytech. Mech. Eng.

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The oil consumption in an internal combustion engine is an important source of pollution and particulate emissions, main efforts are done by the manufacturers to reduce to the maximum the impact of the oil consumption on the emissions of the engine, and to satisfy the increasingly rigorous standards of pollution. The losses by friction due to piston ring friction explain 20 % of the total mechanical losses in internal combustion engines. A reduction in piston ring friction would therefore result in higher efficiency, lower fuel consumption and reduced emissions. The goal of this study is to develop a numerical method by using of GT-Suite software to analyze the influence of engine speed and engine load during the working cycle on oil film thickness, frictional force, power losses. Our predicted results were validated with the experimental data of a previous study, and they have shown a good agreement. The results in the current analysis demonstrated that the engine speed and load have a remarkable effect on oil film thickness, friction force and friction power losses between the top ring and cylinder liner. So, it would help in reducing friction as well as making a contribution towards the improvement of engine performance such as torque, efficiency and fuel consumption.

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Section: Reynolds Equationmentioning

confidence: 99%

Parametric Analysis of the Effect of Engine Speed and Load on the Hydrodynamic Performance of the Lubricant in Diesel Engine

Menacer

Bouchetara²

2020

Period. Polytech. Mech. Eng.

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“…is a volume of ring groove II [m 3 ]; The calculation of the blow-by if the sum of the forces acting on the ring I is positive and on the rings II and III is negative (Fig. 3, a) is the following: 1 is determined by the Formula (8);  d dp 2 is determined by the Formula (14) with m = 2; (Fig. 3, b):…”

Section: Case 1 Of the Positional Relationship Of The Rings In The Grmentioning

confidence: 99%

“…A laser fluorescence system was developed to visualise the thickness of the oil film between the PR and the cylinder wall of the running gasoline engine through a small optical window installed in the cylinder wall. The results show significant differences in the profiles of the thickness of the lubricant film for the ring seal if the lubricant deteriorates, which affects the ring friction and, ultimately, fuel economy [14].…”

Section: Introductionmentioning

confidence: 99%

Impact Evaluation of Piston Rings Mobility on a Gas Passage in an Internal Combustion Engine (Ice)

Заренбин¹,

Kolesnikova²,

Sakno³

et al. 2019

SJSUT.ST

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To estimate the effect of the axial movement of piston rings in the piston grooves on the blow-by in the internal combustion engine (ICE) by an experiment-calculated method. This contributes to the development of practical recommendations for the further improvement of the engine ring seal designs. Abstract theorems were used when modelling the effect of the axial movement of piston rings in the piston grooves on the blow-by in an ICE. They are based on the fundamental theory of heat engines, thermodynamics and hydraulics. The ICE running was analysed using design-theoretical research methods. The effect of the axial movement of piston rings in the piston grooves on the blow-by in the ICE was established. This creates prerequisites for a more accurate assessment of their sealing capacity and for ways to further improve them. Calculated dependences

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“…In recent years, laser-induced fluorescence method is another frequently used optical method using expensive laser and high-speed camera. [5][6][7] The light generated by a laser source causes the fluorescence dye present in the lubricant to emit light in a longer wavelength. The intensity captured with high-speed camera of the light emitted reflects the film thickness.…”

Section: Introductionmentioning

confidence: 99%

“…However, the optical interference can only be applied to the basic research of lubrication state because one of the friction pairs must be glass with semi‐permeable film, and it is limited by load, speed and other conditions. In recent years, laser‐induced fluorescence method is another frequently used optical method using expensive laser and high‐speed camera 5‐7 . The light generated by a laser source causes the fluorescence dye present in the lubricant to emit light in a longer wavelength.…”

Section: Introductionmentioning

confidence: 99%

Study on lubrication state of cylinder liner‐piston ring based on resistance measurement method

Liu

Chen

Yan

et al. 2020

Lubrication Science

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Real-time measurement of the lubrication state is one of the critical problems in studying the lubrication state and its transformation characteristics. Based on the experimental results, shrinkage resistance principle and Greenwood's contact theory, a mathematical model for cylinder liner-piston ring that can be used to measure the resistance of film thickness ratio is established. On this foundation, the correspondence between the film thickness ratio and the contact resistance for cylinder liner-piston ring was presented and the technical possibility to characterise the real-time lubrication state was provided. An experimental study for determining the lubrication state of cylinder linerpiston ring based on resistance measurement method was conducted on a reciprocating friction and wear tester to verify the applicability of resistance measurement method in cylinder liner-piston ring friction pair. Results show that the contact resistance method is reliable and practicable to determine the lubrication state of cylinder liner-piston ring friction pair.

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The influence of lubricant degradation on measured piston ring film thickness in a fired gasoline reciprocating engine

Cited by 28 publications

References 52 publications

Parametric Analysis of the Effect of Engine Speed and Load on the Hydrodynamic Performance of the Lubricant in Diesel Engine

Parametric Analysis of the Effect of Engine Speed and Load on the Hydrodynamic Performance of the Lubricant in Diesel Engine

Impact Evaluation of Piston Rings Mobility on a Gas Passage in an Internal Combustion Engine (Ice)

Study on lubrication state of cylinder liner‐piston ring based on resistance measurement method

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