High Durability and Low Fuel Consumption Ring Pack for HDD Engines

Nocera, Eduardo; Bruno, Rafael Antonio; Silva, Davi; Bieneman, Jason

doi:10.4271/2013-01-1725

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…Another advantage of fuel mixtures of diesel and vegetable oil is that they have improved lubrication properties, taking into account that around 40-50% of all energy lost through internal engine friction is lost through piston ring-cylinder friction [15]; some authors have even estimated this energy loss at 75% [16]. Consequently, several studies on the influence of biodiesel-diesel mixtures on piston ring-cylinder friction have been performed.…”

Section: Introductionmentioning

confidence: 99%

Artificial Neural Network-Based Analysis of the Tribological Behavior of Vegetable Oil–Diesel Fuel Mixtures

2019

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The use of fuel mixtures of diesel and vegetable oils in diesel engines is a field of research due to the necessity of reducing pollution. Besides the properties required for the normal operation of diesel engines, other aspects that must be investigated are linked to the influence of these mixtures on piston ring–cylinder tribosystem behavior. Methods used for reducing the friction and wear on the engine cylinders, such as special surface machining, lubricant driving piston rings, etc., are well known. If the fuel mixture brings some improvement in this area, such as a reduction of the friction coefficient value, this can be a way to reduce the power lost by friction into the engine cylinders. In this paper, a methodology is presented based on artificial neural networks for analyzing the complex relationship between vegetable oil percentages in fuel mixtures, with the goal of finding an optimal proportion of vegetable oil corresponding to a minimum value of the friction coefficient. Regular methods were used for data acquisition, i.e., a pin-on-disk module mounted on a tribometer, and two types of vegetable oils were studied, namely sunflower and rapeseed oils. The obtained results show that for each type of vegetable oil there is an optimal proportion leading to the best tribological behavior.

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Section: Introductionmentioning

confidence: 99%

Artificial Neural Network-Based Analysis of the Tribological Behavior of Vegetable Oil–Diesel Fuel Mixtures

2019

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“…1 The single component with the largest amount of frictional loss is the twin land oil control ring (TLOCR). 1,2 The TLOCR is a twopiece piston ring: one piece is the spring, situated on the backside of the ring, forcing it against the cylinder liner, and the other piece is the ring itself, which has two lands that are in contact with the cylinder liner. This study focuses on the potential for contact between a single land of the TLOCR and the cylinder liner to reduce the amount of friction.…”

Section: Introductionmentioning

confidence: 99%

Texture-induced effects causing reduction of friction in mixed lubrication for twin land oil control rings

Söderfjäll

Larsson

Marklund

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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Piston rings are responsible for a major part of the frictional losses in a heavy-duty diesel engine. Such losses can be reduced by applying texture, such as dimples, on the cylinder liner surface. This paper investigates the effect of such texture on the friction between a land of the oil control ring and a textured cylinder liner via numerical simulation. A simulation model considering inertia and mixed lubrication together with a mass-conserving cavitation model is developed. The model is used to determine the dimple parameters that yield the lowest amount of friction for a specific oil control ring of a heavy-duty diesel engine.

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New Polymeric Coating on Sputtered Bearings for Heavy Duty Diesel Engines

Praça¹,

Uehara²,

Ferreira³

et al. 2013

SAE Int. J. Engines

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Worldwide emissions standards are becoming increasingly rigorous, and this leads to more complex engine demands. Several new PCU (Power Cell Unit) technologies are being applied to cope with these demands. This means engine parameters are changing, e.g. higher EGR (Exhaust Gas Recirculation) rates, higher PCP (Peak Cylinder Pressure), lower viscosity oils, higher oil contamination and soot. Therefore the operating conditions for the bearings have drastically changed, leading to an environment prone to seizure occurrences.There is a clear demand for seizure resistant bearings motivated mainly by the increased engine complexity described above. Therefore for HDD (Heavy Duty Diesel) applications the PCU robustness should not be compromised also in terms of wear and fatigue resistance. The polymeric coating developed by MAHLE was applied over a sputtered layer and has demonstrated to be a suitable solution to attend to the application demands. The seizure and wear resistance were strongly reinforced with the use of a polymeric coating when compared to a typical Al-Sn sputtered layer. The functional polymeric layer remains in place after long durability tests in a demanding HDD engine.This paper shows detailed bench and engine test results achieved with this new product to support the conclusions.

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High Durability and Low Fuel Consumption Ring Pack for HDD Engines

Cited by 5 publications

References 8 publications

Artificial Neural Network-Based Analysis of the Tribological Behavior of Vegetable Oil–Diesel Fuel Mixtures

Artificial Neural Network-Based Analysis of the Tribological Behavior of Vegetable Oil–Diesel Fuel Mixtures

Texture-induced effects causing reduction of friction in mixed lubrication for twin land oil control rings

New Polymeric Coating on Sputtered Bearings for Heavy Duty Diesel Engines

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