Simulation of engine life time related with abnormal oil consumption

Chun, Sang Myung

doi:10.1016/j.triboint.2010.11.020

Cited by 20 publications

(6 citation statements)

References 15 publications

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“…Another important point concerning the usage of low viscosity oils is related with oil consumption effects in engine. Oil consumption has two main origins, blow-by effect [44] and cylinder liner-piston rings dynamics [45], since the lubricant is the responsible for sealing the combustion chamber in the expansion cycle. A variation in this viscosity could result in an increase in oil consumption, as studied by Carden et al [16].…”

Section: Tribology and Wear Related To Low-viscosity Oilsmentioning

confidence: 99%

Low viscosity engine oils: Study of wear effects and oil key parameters in a heavy duty engine fleet test

Macián

Tormos

Ruíz

et al. 2016

Tribology International

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Low viscosity engine oils (LVO) are considered key contributor for improving fuel economy in internal combustion engines (ICE). Attending that the use of LVO could imply a variation in tribological states found in ICE, this work's aim is to test LVO in real fleet, with emphasis on engine wear and oil key performance indicators. This test comprised 39 buses, two engine technologies and four different lubricants. For each sample, the elemental composition of the wear debris by ICP-AES and HTHS viscosity of the oil were measured among other properties. The results showed that, with a correct oil formulation, there is no significant difference when using LVO in terms of engine wear, HTHS viscosity variation and oil consumption.

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Section: Tribology and Wear Related To Low-viscosity Oilsmentioning

confidence: 99%

Low viscosity engine oils: Study of wear effects and oil key parameters in a heavy duty engine fleet test

Macián

Tormos

Ruíz

et al. 2016

Tribology International

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“…The Reynolds equations are solved iteratively in each time step to determine the hydrodynamic pressure distribution between ring running surface and liner. The last part of the simulation procedure deals with the evaluation of oil consumption to the combustion gas [34] and the friction loss [35,36]. All relevant mechanisms are considered; the calculation is done quasistatically per time step, and the program code is designed by Fortran.…”

Section: Performance Of Ring Packmentioning

confidence: 99%

Interring Gas Dynamic Analysis of Piston in a Diesel Engine considering the Thermal Effect

Guo

et al. 2015

Mathematical Problems in Engineering

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Understanding the interaction between ring dynamics and gas transport in ring pack systems is crucial and needs to be imperatively studied. The present work features detailed interring gas dynamics of piston ring pack behavior in internal combustion engines. The model is developed for a ring pack with four rings. The dynamics of ring pack are simulated. Due to the fact that small changes in geometry of the grooves and lands would have a significant impact on the interring gas dynamics, the thermal deformation of piston has been considered during the ring pack motion analysis in this study. In order to get the temperature distribution of piston head more quickly and accurately, an efficient method utilizing the concept of inverse heat conduction is presented. Moreover, a sensitive analysis based on the analysis of partial regression coefficients is presented to investigate the effect of groove parameters on blowby.

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“…When the oil film thickness ratio is greater than 4, asperity contact force is not taken into consideration. [3][4][5][6] However, the G-T model assumes that the behavior of a single asperity is derived from the Hertzian equation, which only considers the elastic deformation of asperity. 7 Furthermore, Hertz model may cause a big prediction error for large strain conditions, which usually occur in boundary lubrication.…”

Section: Introductionmentioning

confidence: 99%

A new asperity interaction model considering transient flash temperature and inhomogeneous distribution of oil viscosity

Zhang

Zhao

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part J:

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A momentary contact of asperities will generate transient flash temperature phenomena in boundary lubrication. According to the viscosity–temperature characteristics of lubricant, the inhomogeneous distribution of temperature during the process of asperity contact would cause the inhomogeneous distribution of oil viscosity. This paper proposes a coupled Eulerian–Lagrangian based approach to analyze the influence of inhomogeneous distribution of viscosity on the friction coefficient of an asperity junction. The asperity interaction in boundary lubrication with different sliding velocities and different degrees of overlap of the undeformed surfaces were taken into account. Simulation results showed that the friction coefficient is proportional to the overlap and inversely proportional to sliding velocity. The results also showed that the influence of inhomogeneous distribution of oil viscosity on friction coefficient in boundary lubrication is limited.

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Simulation of engine life time related with abnormal oil consumption

Cited by 20 publications

References 15 publications

Low viscosity engine oils: Study of wear effects and oil key parameters in a heavy duty engine fleet test

Low viscosity engine oils: Study of wear effects and oil key parameters in a heavy duty engine fleet test

Interring Gas Dynamic Analysis of Piston in a Diesel Engine considering the Thermal Effect

A new asperity interaction model considering transient flash temperature and inhomogeneous distribution of oil viscosity

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