New Device for Piston-Ring Assembly Friction Force Measurement in IDI Diesel Engine.

Yun, Jeong-Eui; Kim, Sung Soo

doi:10.1299/jsmeb.36.723

Cited by 5 publications

(6 citation statements)

References 13 publications

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“…In overcoming the design challenges discussed above, researchers have adopted a range of designs in floating-liner equipment [14,35,46,[54][55][56][59][60][61][62][63][64]. In this section, various approaches to designs have been examined and classified into three categories named Alpha, Beta, and Gamma.…”

Section: Discussion: Major Configurations Of Floating-liner Techniquesmentioning

confidence: 99%

“…The main reason for this is to include the parameters and factors of the combustion that cannot/hard to be simulated otherwise. For example, if one wants to investigate the effect of blow-by gases on the friction between the piston rings and the liner, as in Reference [54], firing will be the only option. Another example is the study of the effect of the EGR on the friction between piston-ring and liner, as in Reference [35].…”

Section: Design Challenges Associated With Firing Operation Of the Flmentioning

confidence: 99%

“…One of the issues that arises with the use of floating-liners in firing engines is the increase in noise in the friction signal associated with engine vibrations. This is because the intensity of the vibrations in firing is higher than in motoring operation [54] as both the inertial dynamics of the piston, as well as the spectral composition of combustion pressure, contain many orders of engine vibrations. Figure 12 shows the maximum peak-to-peak inertia forces of the floating-liner due to the vibrations of the engine block.…”

Section: Correction Of Friction Data For Engine Vibrationsmentioning

confidence: 99%

“…This can be achieved with simple annular metal. Figure 13 shows an annular copper plate used to protect the O-rings in firing conditions [54]. Additional cooling system sealing may be needed, as well, to cool the engine.…”

Section: Protection Of Polymer Sealsmentioning

confidence: 99%

“…For the simplest form of the floating-liner, Figure 12. Inertia forces due to the vibration of the engine block, adapted from Reference [54].…”

Section: Choosing Firing Floating-liner Instrumentationmentioning

confidence: 99%

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A Critical Review of Approaches to the Design of Floating-Liner Apparatus for Instantaneous Piston Assembly Friction Measurement

et al. 2021

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Several approaches have been developed to measure instantaneous friction between the piston assembly and cylinder in internal combustion (IC) engines, such as floating-liner, reciprocating liner, instantaneous mean effective pressure (IMEP), fixed sleeve, and (P-ω) method and tribological bench tests. However, the “floating-liner method” and the “(IMEP) method” are the most common methods used to measure instantaneous friction between the piston assembly and IC engines. This paper critically evaluates different approaches to the design of the “floating-liner”. The paper begins by discussing piston assembly frictional losses and their significance and then discuss the development of instantaneous piston-friction measurements. After that, it reviews the main design challenges in the floating-liner approach. “Methods of cylinder sealing” and “force balancing methods” are also reviewed. Design challenges associated with firing operation were presented. Floating-liner designs were classified into different categories with a detailed presentation of the features of each. The paper ends by presenting a range of broad recommendations for further work which would benefit future designs.

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