The influence of oil supply and cylinder liner temperature on friction, wear and scuffing behavior of piston ring cylinder liner contacts – A new model test

Obert, Petra; Müller, Torben; Füßer, Hans-Jürgen; Bartel, Dirk

doi:10.1016/j.triboint.2015.08.026

Cited by 70 publications

(36 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dynamic characteristics of the part of piston skirt and cylinder liner were analyzed, and the proposed model was validated by comparing the simulated results with the experimental data. Obert et al [13] developed a reciprocating model test to investigate the influence of the temperature and oil supply on the tribological behavior of the piston ring-cylinder liner contacts. The real engine situation at fired top dead center was simulated by carefully adjusting the friction, scuffing, wear, oil supply, and temperature.…”

Section: Introductionmentioning

confidence: 99%

The Analysis of Secondary Motion and Lubrication Performance of Piston considering the Piston Skirt Profile

Lü

Wang

et al. 2018

Shock and Vibration

View full text Add to dashboard Cite

The work performance of piston-cylinder liner system is affected by the lubrication condition and the secondary motion of the piston. Therefore, more and more attention has been paid to the secondary motion and lubrication of the piston. In this paper, the Jakobson-Floberg-Olsson (JFO) boundary condition is employed to describe the rupture and reformation of oil film. The average Reynolds equation of skirt lubrication is solved by the finite difference method (FDM). The secondary motion of pistonconnecting rod system is modeled; the trajectory of the piston is calculated by the Runge-Kutta method. By considering the inertia of the connecting rod, the influence of the longitudinal and horizontal profiles of piston skirt, the offset of the piston pin, and the thermal deformation on the secondary motion and lubrication performance is investigated. The parabolic longitudinal profile, the smaller top radial reduction and ellipticities of the middle-convex piston, and the bigger bottom radial reduction and ellipticities can effectively reduce the secondary displacement and velocity, the skirt thrust, friction, and the friction power loss. The results show that the connecting rod inertia, piston skirt profile, and thermal deformation have important influence on secondary motion and lubrication performance of the piston.

show abstract

Section: Introductionmentioning

confidence: 99%

The Analysis of Secondary Motion and Lubrication Performance of Piston considering the Piston Skirt Profile

Lü

Wang

et al. 2018

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…In engine development, the compression ratio and the specific power of engines have been progressively increased [1,2] resulting in higher cylinder liner temperatures near the combustion chamber, especially at top dead centre. This produces conditions that are more likely to produce wear and scuffing of piston ring-cylinder liner contacts [3]. In addition, non-ferrous materials have been introduced in both engines and transmissions to reduce vehicle weight and thus improve fuel economy.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Aluminium–Silicon Alloy on ZDDP Tribofilm Formation on the Counter-Surface

Shimizu

Spikes

2017

Tribol Lett

View full text Add to dashboard Cite

In order to reduce vehicle weight and thus improve fuel economy, aluminium (Al) alloys have been increasingly adopted as contact surfaces such as piston skirts and cylinder liners in current engines. In general, hypereutectic Al-Si alloys are used, in which hard silicon grains are embedded in a softer Al-Si single phase matrix. It is reported that after rubbing, the matrix is removed to leave silicon grains protruding from the surface. However, the response of the counter-surface by these silicon grains is rarely investigated. In this study, mini traction machinespace layer imaging (MTM-SLIM) has been used to monitor tribofilm formation in situ and investigate the evolution of both surfaces in the contact of a steel ball on an Al-Si disc lubricated by ZDDP solution. In low-load conditions, the top layer of aluminium on the Al-Si disc is removed physically to leave silicon grains protruding from the surface, while ZDDP tribofilm pads are formed mainly on the grains. On the counter-surface (steel ball), ZDDP tribofilms are formed and build up with no wear scars. In high-load conditions, deep gaps are observed to form initially round the silicon grains on the disc. During rubbing, these become shallower, while the silicon grains start to protrude. On the steel ball, ZDDP tribofilm is generated initially over the whole rubbing track, but then the tribofilm in the middle of the track is almost completely removed by rubbing against the protruding silicon grains. Wear of the underlying steel surface then ensues.

show abstract

“…Because of this, cylinder liner temperature near the combustion chamber, especially at top dead centre, has increased so the conditions have become more severe for wear and scuffing behaviour of piston ring cylinder liner contacts [3]. In these more severe conditions, engine oil formulations are required to maintain good anti-wear and anti-seizure performance.…”

Section: Introductionmentioning

confidence: 99%

“…Since zinc dialkyldithiophosphates (ZDDPs) are widely used in engine oils, primarily as anti-wear additives, many researchers have studied their anti-wear and anti-seizure performance under reciprocating pure sliding conditions which simulate piston ring and cylinder liner assembly. In previous research, friction machines such as the Optimol SRV and Cameron Print reciprocating rig have been employed and tribofilms formed on the specimens after rubbing tests have been investigated [3][4][5][6][7][8][9]. Recently, a new approach to monitor ZDDP film formation process under pure sliding conditions using AFM (atomic force microscopy) was introduced by Gosvami et al [10].…”

Section: Introductionmentioning

confidence: 99%

The Tribofilm Formation of ZDDP Under Reciprocating Pure Sliding Conditions

Shimizu

Spikes

2016

Tribol Lett

View full text Add to dashboard Cite

The anti-wear and anti-seizure performance and action mechanisms of zinc dithiophosphate (ZDDP) have been investigated under reciprocating pure sliding conditions to simulate piston ring and cylinder liner assembly, using new techniques. The Mini Traction Machine-Space Layer Imaging is a useful method for monitoring tribofilm formation by ZDDPs. However, tests are generally carried out in mixed sliding-rolling conditions and ZDDP film formation in reciprocating pure sliding conditions is rarely investigated. In this paper, the authors describe an investigation of ZDDP film formation in stationary ball on reciprocating disc pure sliding conditions and compare the results to those obtained in unidirectional pure sliding conditions. In unidirectional pure sliding conditions, the worn area on the ball expands with test time. By contrast, in reciprocating pure sliding conditions, tribofilm forms on the stationary ball and no significant damage occurs. In the initial tribofilm formation under reciprocating pure sliding conditions, solid particulate tribofilm with a high concentration of S forms initially in the contact area and subsequently breaks up. During further rubbing, a Zn-and P-rich tribofilm forms on the comminuted sulphur-rich tribofilm and also the area where the initial tribofilm was removed.

show abstract

The influence of oil supply and cylinder liner temperature on friction, wear and scuffing behavior of piston ring cylinder liner contacts – A new model test

Cited by 70 publications

References 28 publications

The Analysis of Secondary Motion and Lubrication Performance of Piston considering the Piston Skirt Profile

The Analysis of Secondary Motion and Lubrication Performance of Piston considering the Piston Skirt Profile

The Influence of Aluminium–Silicon Alloy on ZDDP Tribofilm Formation on the Counter-Surface

The Tribofilm Formation of ZDDP Under Reciprocating Pure Sliding Conditions

Contact Info

Product

Resources

About