Analysis of Oil Consumption by Observing Oil Behavior Around Piston Ring Using a Glass Cylinder Engine

Saito, Kimitaka; Igashira, Toshihiko; Matumoto, Tatuyoshi; Nakada, Masahiko

doi:10.3154/jvs.10.1supplement_151

Cited by 2 publications

(2 citation statements)

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“…Developing a method to evaluate in-cylinder lubricant transport rates has long challenged engine tribologists. Early investigators used optical access to gain a qualitative understanding of the position of lubricant volumes at different parts of the stroke in motored engine cylinders [21,22]. Techniques to study lubricant flow to various parts of the piston-assembly using laser induced fluorescence (LIF) and dyes to enhance the visibility and movement of lubricant, have also been used, mainly in motored engines [23,24].…”

Section: Discussionmentioning

confidence: 99%

Experimental Measurement of the Time-Based Development of Oil Film Thickness, Lubricating Film Extent and Lubricant Transport in Crosshead Engines

2020

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This paper describes the design of a test apparatus which simulates the lubrication of large, slow, two-stroke marine engines in which the ring pack is lubricated by means of injectors supplying lubricant above the piston. The equipment is able to control lubricant injection parameters (volume, frequency, etc.) and employs capacitance based lubricant film thickness transducers to allow instantaneous oil film thickness and film extent around the compression ring to be investigated on a stroke-by-stroke basis. It is demonstrated that the equipment can be used to study the development of lubricating films on successive strokes under differing injection strategies. Time varying changes in lubricating film thickness and film extent have been measured and the rate at which the lubricant spreads across the cylinder wall has also been investigated. It has been observed that increases in oil-film thickness are strongly linked to the transition from starved to fully-flooded inlet conditions and that net lubricant transport rates along different parts of the cylinder can be evaluated from measured data.

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Section: Discussionmentioning

confidence: 99%

Experimental Measurement of the Time-Based Development of Oil Film Thickness, Lubricating Film Extent and Lubricant Transport in Crosshead Engines

2020

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“…While it is relatively straightforward to incorporate hydrodynamic flow effects, other contributions to oil supply arise from other sources. These include 'pumping' (the delivery of oil from behind the ring in the ring groove) [20], the inertial 'throw' of lubricant accumulated in front of the ring due to scraping, and the transfer of oil 'droplets' in the gas flow through the ring gap on engine braking [21]; these effects are much more difficult to model effectively. Some models that include some additional transport influences have been developed [19] as have models that include the influence of the piston skirt on lubrication, but it is possible that the best of these have not been combined or even described in open literature as they have commercial value to the engine component manufacturers who have developed them.…”

Section: Variation In Film Thicknessmentioning

confidence: 99%

The effect of load and viscosity on the minimum operating oil film thickness of piston-rings in internal combustion engines

Sochting

Sherrington

2009

Proceedings of the Institution of Mechanical Engineers, Part J:

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Computer simulations are now routinely used in the design and analysis of ring packs for internal combustion engines. Commonly they predict that an increase in engine load decreases minimum operating film thickness because oil availability and oil transport through the ring pack are reduced under these conditions. To assess the reliability of new simulations, investigators compare the output of computer models with experimental measurements of parameters on operating engines. Contributing to this process this paper presents an experimental study of an investigation into the effect of load on the minimum oil film thickness between piston rings and cylinder liner in a fired compression ignition engine. Oil film thickness data were collected using capacitance-based transducers located near top dead centre and mid-stroke. Experiments were performed at 2000 r/min using two mono-grade oils (SAE 50 and SAE 20) and one multi-grade oil (SAE 5W50) under a range of fixed engine loads. The experimental data obtained are discussed in the context of experimental and theoretical work published by other investigators.

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Analysis of Oil Consumption by Observing Oil Behavior Around Piston Ring Using a Glass Cylinder Engine

Cited by 2 publications

References 0 publications

Experimental Measurement of the Time-Based Development of Oil Film Thickness, Lubricating Film Extent and Lubricant Transport in Crosshead Engines

Experimental Measurement of the Time-Based Development of Oil Film Thickness, Lubricating Film Extent and Lubricant Transport in Crosshead Engines

The effect of load and viscosity on the minimum operating oil film thickness of piston-rings in internal combustion engines

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