Comparison between Theoretical Calculations and Oil Film Thickness Measurements Using the Total Capacitance Method for Crankshaft Bearings in a Firing Engine

Paranjpe, Rohit S.; Tseregounis, Spyros I.; Viola, Michael B.

doi:10.1080/10402000008982350

Cited by 18 publications

(6 citation statements)

References 19 publications

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“…For hydrodynamic lubrication in conformal contacts, lubricant film thickness measurements are mostly concentrated on journal bearings or tilting pad bearings, and various measurement methods have been used [3][4][5][6], e.g. the total capacitance method, the eddy current approach, the fiber-optic sensor technique and the ultrasonic reflection method.…”

Section: Introductionmentioning

confidence: 99%

Interferometry Measurement of Lubricating Films in Slider-On-Disc Contacts

Guo

Wong

et al. 2010

Tribol Lett

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Interferometry proves to be an efficient way to measure thin lubricant film thickness. However, there are very few reports on the film thickness measurement of conformal lubricated contacts using optical interferometry due to experimental difficulties. In this article, a custombuilt test apparatus is introduced, in which a lubricated conformal contact is made between a stationary fixedincline slider and a moving transparent disc. With a flexible holder, the slider can be positioned in such a way that a specified inclination with respect to the flat disc plane can be obtained. When the disc rotates and the slider is loaded against it, lubricating films are generated. The minimum film thickness h m at the exit can be determined by interference intensity changes. Measurement error correction in the film thickness was discussed. Case experiments were carried out using the new test apparatus. The credibility of the measurement system is validated by good correlation between the experiments and the theoretical results. The applicability is demonstrated by the film thickness measurement under different inclinations, loads, velocities, lubricants and slider materials. Amongst those case experiments, it is highlighted that the influences of solid/ liquid interface properties on the lubrication behaviours can be clearly identified in terms of film thickness.

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Section: Introductionmentioning

confidence: 99%

Interferometry Measurement of Lubricating Films in Slider-On-Disc Contacts

Guo

Wong

et al. 2010

Tribol Lett

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“…By reducing the applied voltage on the bearing in comparison to Filowitz et al, it is possible to calculate the lubrication film thickness from the measured resistance. In a similar approach, the electric capacity is measured instead of the resistance of the bearing (Total Capacitance Technique), as shown in Figure 5a [45][46][47]. Spearot and Murphy [48] compare the results of the Total Resistance Technique and the Total Capacitance Technique and conclude that the Total Capacitance Technique is superior due to the greater robustness of the technique respective to changes in temperature or cavitation.…”

Section: Sensory Utilizable Hydrodynamic Journal Bearingsmentioning

confidence: 99%

Sensory Utilizable Design Elements: Classifications, Applications and Challenges

et al. 2022

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The sensory acquisition of in situ data in technical systems is one of the key requirements set by ongoing digitalization. The sensory utilization of mechanical design elements is a step towards the accomplishment of this requirement. To set a common ground for further research in the context of sensory utilizable design elements, this paper reviews the current state of research in this topic. First, the aim, potentials and classification of sensory utilizable design elements are introduced. Next, examples of sensory utilizable design elements are presented. These examples are used to demonstrate the technical and methodical challenges that have to be addressed in order to establish sensory utilizable design elements as a solution for the requirements of digitalization.

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“…The existing methods of modeling the interconnected processes of lubricant flow in thin liquid layers and nonlinear dynamics for a system of "a crankshaft -lubricating films -a crankcase" are reduced to the separate subtasks solution [1][2][3].…”

Section: Researchmentioning

confidence: 99%

Dynamics and Lubrication Problem Analysis of Main Bearings for IC Engines Based on Coupling between a Crankshaft and a Flexible Whole Engine Block

Rozhdestvensky¹,

Khozeniuk²,

Surovtsev³

2018

Tribol. Ind.

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The article presents the solution to the interconnected problem of main bearings dynamics for the forced internal combustion (IC) engine. For the crankshaft main bearings system of the (IC) engines it is necessary to consider the cross-coupling effect of the tribounits arising from elastic links of bearings and journals (by means of an engine crankcase and a crankshaft). The technique is based on the iterative scheme of the solution of four tasks given above. It analyzes not only the influence of macrogeometry parameters of each main bearing and the influence of non-Newtonian properties of lubricant, but also elastic characteristics of a crankshaft and crankcase and supports displacements caused by the thermal deformation of an engine crankcase. The influence of technological coaxiality tolerance for bearings and necks of a crankshaft is also estimated. The modeling results of two types of engines are compared to various design of a crankcase. The research shows the necessity of applying the integrated approaches which allow considering simultaneously both the features of autonomous bearings and many facts of their interaction.

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Comparison between Theoretical Calculations and Oil Film Thickness Measurements Using the Total Capacitance Method for Crankshaft Bearings in a Firing Engine

Cited by 18 publications

References 19 publications

Interferometry Measurement of Lubricating Films in Slider-On-Disc Contacts

Interferometry Measurement of Lubricating Films in Slider-On-Disc Contacts

Sensory Utilizable Design Elements: Classifications, Applications and Challenges

Dynamics and Lubrication Problem Analysis of Main Bearings for IC Engines Based on Coupling between a Crankshaft and a Flexible Whole Engine Block

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