Estimation of Blowby in Multi-cylinder Diesel Engine Using Finite Element Approach

Malagi, Ravindra R.

doi:10.4271/2012-01-0559

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Besides, the mating surfaces of the ring working surface and liner are covered by lubricating oil and most time of a cycle, the piston rings are attached to one side of ring grooves. So the major flow leakage takes place through the ring end gap, 50 as shown in Figure 7(a). In this study, the cylinder liner deformation and ring axial movement are ignored, only the effect of ring end gap on gas leakage is considered, the inter-ring gas flowing through the ring end gap is shown in Figure 7(b).…”

Section: Theoretical Modelmentioning

confidence: 99%

Starved lubrication analysis for the top ring and cylinder liner of a two-stroke marine diesel engine considering the thermal effect of friction

Zhan

Ning

Meng

et al. 2021

International Journal of Engine Research

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The thermal effect of friction plays an important role in friction pairs working under heavy load and starved lubrication conditions, such as the piston ring and cylinder liner (PRCL) system of two-stroke marine diesel engines. Friction heat will degrade the lubrication and increase the scuffing risk. In this study, considering the thermal effect of friction, the tribological characteristics of the top ring and cylinder liner of a two-stroke marine diesel engine under starved lubrication are studied. It is found that the temperature rise due to friction is significant and has a strong influence on the tribological characteristics of the PRCL system. Moreover, based on the orthogonal test method, the effects of groove textures under different oil supplies are also explored. Only well-designed groove textures can reduce friction and wear at the same time.

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Section: Theoretical Modelmentioning

confidence: 99%

Starved lubrication analysis for the top ring and cylinder liner of a two-stroke marine diesel engine considering the thermal effect of friction

Zhan

Ning

Meng

et al. 2021

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…The leakage paths of the sealing ring pack in the stuffing box mainly include three ways, namely, the clearance between the ring and ring groove as shown in Figure 5(a), the clearance between the ring and piston rod as shown in Figure 5(b), and the ring end gaps as shown in Figure 5(c), which is very similar to the leaking issue of the piston ring pack-cylinder liner. 36 According to the previous studies, the ring end gaps are the main way of leakage 37–39 and can be regarded as the only way of leakage for simplicity. 40,41 In this article, this assumption is adopted to calculate the pressure of the chamber between Ring II-1 and Ring II-2.…”

Section: Mathematical Modelmentioning

confidence: 99%

A tribological analysis on stuffing box-piston rod system of low-speed marine diesel engines

Meng

Xie

2018

International Journal of Engine Research

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The stuffing box-piston rod system is widely used in the low-speed marine diesel engines to scrape oil and ensure sealing. Its friction power loss and wear rate are great, but the studies about the system are very limited. In this study, based on the special structure and working conditions of the stuffing box, the analytical model for the tribological properties of the stuffing box-piston rod system is developed considering the oil starvation and relative ring location effects. The minimum oil film thickness, friction, oil transportation, and asperity contact are calculated for the stuffing box. The analysis results show that compared with the fully flooded lubrication, the minimum oil film thicknesses of the rings reduce significantly in the middle of the strokes under the starved lubrication condition, but the friction losses of the rings are influenced by the comprehensive effects of the oil film thickness reduction and lubricating area reduction under the starved lubrication condition, which is related to the specific profiles of the rings. In addition, compared with the engine piston ring pack, the relative ring location effect is more obvious in the stuffing box ring pack because there are more rings and the ring intervals are larger. The relative ring location effect makes the minimum oil film thicknesses, friction forces, and asperity contacts of the rings have oscillations after bottom dead center and top dead center.

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Estimation of Engine Parameters from Measured Cylinder Pressure

Maurya

2019

Mechanical Engineering Series

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Estimation of Blowby in Multi-cylinder Diesel Engine Using Finite Element Approach

Cited by 5 publications

References 12 publications

Starved lubrication analysis for the top ring and cylinder liner of a two-stroke marine diesel engine considering the thermal effect of friction

Starved lubrication analysis for the top ring and cylinder liner of a two-stroke marine diesel engine considering the thermal effect of friction

A tribological analysis on stuffing box-piston rod system of low-speed marine diesel engines

Estimation of Engine Parameters from Measured Cylinder Pressure

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