Elastohydrodynamic Lubrication of a Connecting Rod Journal Bearing in Consideration of Shapes of the Bearing

Torii, Hisanao; Nakakubo, Tamio; Nakada, Masahiko

doi:10.4271/920485

Cited by 11 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 1992, Torii et al [5], using simulation, measured the ®lm thickness and determined the position of the big-end journal shaft centre. F or this, they placed four incremental position eddy current transducers in the bearing.…”

Section: Experimental Analysismentioning

confidence: 99%

Comparison between experimental film thickness measurements and elastohydrodynamic analysis in a connecting-rod bearing

Moreau

Maspeyrot

Bonneau

et al. 2002

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

This paper describes the experimental measurements and the theoretical calculations of oil-®lm thickness in a dynamically loaded connecting-rod big-end bearing. F our eddy current gap sensors for each bearing are used to measure the oil-®lm thickness and to deduce the bearing trajectories. Experimental data for crankshaft main bearings are easy to obtain but connecting-rod bearings are more dif®cult to control due to the dif®culty of installing instrumentation on connectingrods that are rotating and reciprocating. The solution uses a mechanical linkage ®xed under the piston axis. The elastohydrodynamic model considers connecting-rod elastic deformations. The calculation process uses ®nite element and N ewton±R aphson methods for the numerical analysis. Comparisons of both the load and crankshaft speed effects are made between experiment and the theory. Keywords: elastic engine bearing, connecting-rod bearing, experimental oil-®lm thickness measurement, ®nite element method NOTATION e x horizontal eccentricity (m) e y vertical eccentricity (m) h oil-®lm thickness (m) p hydrodynamic pressure in the ®lm (Pa) t time (s) y angular abscissa in a bearing (rad) m lubricant dynamic viscosity (Pa s) o crankshaft rotating speed relative to the connecting-rod (rad/s)

show abstract

Section: Experimental Analysismentioning

confidence: 99%

Comparison between experimental film thickness measurements and elastohydrodynamic analysis in a connecting-rod bearing

Moreau

Maspeyrot

Bonneau

et al. 2002

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

“…Torri et al [6] used an elastohydrodynamic analysis to study the in¯uence of bearing relief and cap shift in a connecting rod big-end bearing. Elastic deformations and journal centre position were estimated and compared with values measured in a test rig.…”

Section: Previous Work On Lobingmentioning

confidence: 99%

Influence of circumferential waviness on engine bearing performance

Mehenny

Taylor

2000

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The in¯uence of circumferential waviness of the journal on the lubrication of the intermain bearing of an automotive engine is investigated using a theoretical analysis. The analysis is for two-dimensional thin ®lm¯ow, with oil-®lm history. The bearing and shaft surfaces were assumed to be rigid and the lubricant isoviscous. The results show a signi®cant in¯uence of shaft lobing on predicted maximum ®lm pressure and minimum ®lm thickness, particularly as the number and size of lobes increase. It is concluded that, for satisfactory operation of engine bearings, circumferential form errors of the shaft need to be controlled.

show abstract

“…It was found that there was a decrease in the smallest minimum oil-film thickness with an increase in the peak hydrodynamic pressure in noncircular connecting rod bearings. Torii, et al (6) investigated both experimentally and theoretically the influence of bearing shape on the lubrication of an elastic connecting rod bearing. Vincent, et al (7) studied cavitation within noncircular journal bearings under dynamic loading.…”

Section: Introductionmentioning

confidence: 99%

Lubrication Analysis of a Connecting-Rod Bearing in a High-Speed Engine. Part II: Lubrication Performance Evaluation for Non-Circular Bearings

Wang

Keith

Yang

et al. 2004

Tribology Transactions

View full text Add to dashboard Cite

In this article a numerical investigation of a connecting rod bearing operating at 6,500 rpm is performed. This is a companion to an earlier article that took into account the effects of the inertial force and the variable bolt tension force, which are considered to be the principal factors that affect the connecting rod bearing lubrication characteristics of an engine running at high speed. It was found that a thinner minimum oil film and a larger peak hydrodynamic pressure are predicted in a deformed connecting rod bearing than in a rigid connecting rod bearing. Multi-peaked hydrodynamic pressure was found to appear as well because of two or more converging-diverging film regions.

show abstract

Elastohydrodynamic Lubrication of a Connecting Rod Journal Bearing in Consideration of Shapes of the Bearing

Cited by 11 publications

References 5 publications

Comparison between experimental film thickness measurements and elastohydrodynamic analysis in a connecting-rod bearing

Comparison between experimental film thickness measurements and elastohydrodynamic analysis in a connecting-rod bearing

Influence of circumferential waviness on engine bearing performance

Lubrication Analysis of a Connecting-Rod Bearing in a High-Speed Engine. Part II: Lubrication Performance Evaluation for Non-Circular Bearings

Contact Info

Product

Resources

About