Polymeric Coated Lead Free Bronze Bearings for High Durability in Medium Duty Diesel Engines

Ferreira, Matheus dos Santos; Silva, Adalto; Praça, Mário; Costa, Sandra Matos Cordeiro

doi:10.4271/2014-36-0405

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…Polymer coatings are increasingly available on the market and can offer better durability in start-stop conditions [30,31]. As these coatings are non-metallic materials, their behaviour in terms of wear and plastic deformation is distinctly different to metallic materials.…”

Section: New Classes Of Surface Textures and Coatingsmentioning

confidence: 99%

Friction and Wear in Automotive Journal Bearings Operating in Today’s Severe Conditions

Sander¹,

Allmaier²,

Priebsch³

2016

Advances in Tribology

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A current trend in the transport sector seeks to increase the vehicle efficiency and to cut fuel consumption which leads to new technologies and advancements in modern and future combustion engines. Some of these technical progresses lead to highly stressed engine parts and new challenges arise, particularly for journal bearings. The increasing thermal and mechanical load caused by downsized and turbocharged engines, friction reduction by employing low-viscosity lubricants and other emission reduction measures-for utilizing stop-start systems-put additional stress on the crankshaft journal bearings. This contribution focuses on highly stressed journal bearings which operate in the boundary, mixed and hydrodynamic lubrication regime. Therefore, measurements on a journal bearing test-rig are performed which allow an extensive verification of the numerical investigation. For the numerical analysis of friction and wear, a mixed elasto-hydrodynamic simulation approach is developed, which considers the elastic deformation of the contacting components, the complex rheological behaviour of the lubricant and metal-metal contact if the lubricant is unable to separate the contacting surfaces. Both the rheological data and the surface roughness parameters are obtained from measurements. The current challenges are studied in four application-oriented examples and the influencing parameters on a reliable friction and wear prediction are explored.

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Section: New Classes Of Surface Textures and Coatingsmentioning

confidence: 99%

Friction and Wear in Automotive Journal Bearings Operating in Today’s Severe Conditions

Sander¹,

Allmaier²,

Priebsch³

2016

Advances in Tribology

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show abstract

“…The upper conrod bearings (URB) were assembled using two coating technologies in both tests. Three cylinders used lead free electroplated bearings and three others, bearings with a high wear resistant polymer coating [12]. For lower rod bearing (LRB) current production, bi-metal lining material was tested in both oil tests.…”

Section: Bearingsmentioning

confidence: 99%

Low viscosity oils impact on heavy duty diesel engine components

Rejowski¹,

Tomanik²,

Souza³

2016

Anais Do XXIV Simpósio Internacional De Engenharia Automotiva

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Increasing fuel costs and stringent emissions standards in the world became the most important challenges for the transportation industry. The use of low viscosity oils is considered an effective way to reduce fuel consumption of Heavy Duty Diesel (HDD) engines. However, the impact of oil viscosity reduction and novel additive packages needs to be better understood in durability of engine components. This paper investigated the application of a low viscosity oil SAE 10W-30 (HTHS 2.9cP) with novel formulation prepared to withstand EURO VI and OEM demands, through a 500 hours durability dynamometer test with extended oil drainage interval. The main tribo system such as liner-rings-piston, rod bushing-pin-piston and rod-bearing-crankcase were evaluated in terms of wear impact by visual and dimensional analyzes. The results obtained with low viscosity oil test were compared with the same engine components which were tested with typical SAE15W-40 oil (HTHS 3.7cP min.) applied in EURO V/VI HDD engines. From the comparative analyses, it was possible to identify some engine components that do not require design updates or technologies changes. For others, it was possible to anticipate performance issues that will demand new design and or material upgrades. Oil analyses were done each 50h of test. The oil degradation due to the extended drainage time is discussed in this paper.

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Schmierung bei Bedarf – eine neue Generation von Hochleistungs-Gleitlagerbeschichtungen

2018

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Polymeric Coated Lead Free Bronze Bearings for High Durability in Medium Duty Diesel Engines

Cited by 5 publications

References 5 publications

Friction and Wear in Automotive Journal Bearings Operating in Today’s Severe Conditions

Friction and Wear in Automotive Journal Bearings Operating in Today’s Severe Conditions

Low viscosity oils impact on heavy duty diesel engine components

Schmierung bei Bedarf – eine neue Generation von Hochleistungs-Gleitlagerbeschichtungen

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