Cylinder liner technology reduces engine oil consumption

2012 ◽  
Vol 2012 (7) ◽  
pp. 4
Keyword(s):  
Cylinder Liner ◽  
Engine Oil ◽  
Oil Consumption

Wear Resistance of Smooth Automotive Cylinder Liner Surfaces

2005 ◽  
Author(s):  
C. Anderberg ◽  
S. Johansson ◽  
P. H. Nilsson ◽  
R. Ohlsson ◽  
B. G. Rose´n
Keyword(s):  
Fuel Consumption ◽  
Piston Ring ◽  
Functional Performance ◽  
Cylinder Liner ◽  
Engine Oil ◽  
Oil Consumption ◽  
Smooth Cylinder ◽  
Liner Surface ◽  
Oil Fuel ◽  
Cylinder Liners

Demands for decreased environmental impact from vehicles are resulting in a strong push for decreased engine oil, fuel consumption and weight. New machining and coating technologies have offered ways to attack these problems. Engine oil and fuel consumption are to a great extent controlled by the topography of the cylinder liner surface and it is therefore important to optimise this surface. Recent engine tests have shown a reduction in oil consumption when using cylinder liners with a smoother finish than that given by the current plateau honing. However, engine manufacturers are hesitant to introduce smoother liner surfaces because of fears of severe wear and scuffing. There is also the possibility that smoother liner surfaces may be more sensitive to the choice of piston ring finishes. This paper therefore seeks to investigate the functional performance and resistance to wear of these smooth cylinder liners and the mating top ring surfaces.

Bore Polishing Wear in Diesel Engine Cylinders

Volume 1 ◽  
2004 ◽  
Author(s):  
Nagaraj Nayak ◽  
P. A. Lakshminarayanan ◽  
M. K. Gajendra Babu ◽  
A. D. Dani
Keyword(s):  
Cylinder Liner ◽  
Engine Oil ◽  
Cylinder Pressure ◽  
Oil Consumption ◽  
Depth Of Penetration ◽  
Wear Model ◽  
Carbon Particles ◽  
Peak Cylinder Pressure ◽  
Study Results

The rate of wear of the cylinder liner is mainly a function of peak cylinder pressure, the depth of penetration of hard carbon particles ingress during abusive running conditions. The problem of wear becomes severe as the blowby past the rings and the oil consumption of an engine increases in diesel engines. In this paper, a methodology is developed to estimate the wear of liner due to bore polishing action. The wear rate is correlated with the product of gaseous load, contact stress, and sliding action of the piston surfaces. Under abnormal conditions, the shear strain due to friction exceeds the plasticity limit of the material, superficial delamination occurs at the liner surfaces. The wear model was validated on large engines running on heavy fuel at 22-bar bmep. The case study results showed that by modifying the piston profile and liner geometry, and bore polishing of the liner surfaces is reduced and the engine oil consumption rate is improved substantially.

Mechanism Research on Cylinder Liner Groove of the Ultrasonic Plateau-Honing

2010 ◽  
Vol 135 ◽  
pp. 107-110 ◽  
Author(s):  
Quan Cheng ◽  
X.J. Zhu ◽  
Jian Qing Wang ◽  
Zhi Meng Lu
Keyword(s):  
Surface Quality ◽  
Cylinder Liner ◽  
Engine Oil ◽  
Length Ratio ◽  
Force Component ◽  
Oil Consumption ◽  
Industrial Practice ◽  
Mechanism Research

Surface-supporting length ratio tp is one of the most important parameters to judge the cylinder liner’s surface quality, which has the obvious influence of on engine oil consumption, blow-by and wearing in. Effective peaks-cutted force has been studied, which is the force component of the supersonic platform honing surging force. It explained that the supersonic platform honing can combine the micro-honing and the platform honing, enhance the value of tp, which has the direct sense to the industrial practice.

scholarly journals Mutual Effect of Groove Size and Anisotropy of Cylinder Liner Honed Textures on Engine Performances

2014 ◽  
Vol 966-967 ◽  
pp. 175-183 ◽  
Author(s):  
Mohammed Yousfi ◽  
Sabeur Mezghani ◽  
Ibrahim Demirci ◽  
Mohamed El Mansori
Keyword(s):  
Mutual Effect ◽  
Cylinder Liner ◽  
Texture Features ◽  
Groove Depth ◽  
Oil Consumption ◽  
Hydrodynamic Friction ◽  
Liner Surface ◽  
Ring Pack ◽  
Mixed Lubrication Regime ◽  
Cylinder Bore

The cylinder liner surface texture, widely generated by the honing technique, contributes a lot on engine functional performances (friction, oil consumption, running-in, wear etc.). In order to improve these functional performances, different honing processes are being developed. These different honing processes generate surfaces with various texture features characteristics (roughness, valleys depth, valley width, cross hatch angle, etc.). This paper addresses a comparison of ring-pack friction for cylinder texture with different cross-hatch angles and valley sizes. It takes in consideration the mutual effect of valley depth and honing angle. A numerical model is developed to predict friction within the cylinder ring-pack system in mixed lubrication regime and a morphological method is used to characterize groove depth. The results show the effect of different honing variables (rotation speed, stroke speed and indentation pressure) on cylinder bore surface textures and hydrodynamic friction of the ring-pack system.

Experimental Investigation of Oil Accumulation in Second Land of Internal Combustion Engines

2005 ◽  
Vol 127 (1) ◽  
pp. 206-212
Author(s):  
T. Icoz ◽  
Z. Dursunkaya
Keyword(s):  
Film Thickness ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Engine Oil ◽  
Combustion Engines ◽  
Oil Consumption ◽  
Oil Accumulation ◽  
Oil Film ◽  
Piston Cylinder ◽  
Total Oil

Blowback of engine oil suspended in combustion gases, when the gas flows from the piston second land back into the combustion chamber, is believed to contribute to oil consumption and hydrocarbon emissions in internal combustion engines. Oil accumulation in the region between top and second compression rings is a factor that influences this phenomenon. The effects of individual parameters, such as oil film thickness and viscosity, however, have still not been understood. The present study was aimed at constructing an experimental setup to study the effect of oil film thickness on oil accumulation in the second land of internal combustion engines. Due to the inherent difficulties of experimentation on production engines, a modeled piston-cylinder assembly was constructed. Total oil accumulation in the modeled second land after a single piston stroke was measured and compared to oil consumption in operating engines.

Exhaust Emissions Characterization of a Turbocharged 2-Stroke Tier 0+ Locomotive Engine: NOx, Particulate Matter and Soluble Organic Fraction Composition

2012 ◽  
Vol 134 (7) ◽  
Author(s):  
Stanislav V. Bohac ◽  
Eric Feiler ◽  
Ian Bradbury
Keyword(s):  
Particulate Matter ◽  
Elemental Carbon ◽  
Engine Oil ◽  
Exhaust Emission ◽  
Moderate Increase ◽  
Oil Consumption ◽  
Engine Operation ◽  
Soluble Organic Fraction ◽  
Insoluble Portion

This study presents a detailed exhaust emission characterization of a 2-Stroke turbocharged line haul locomotive diesel engine fitted with an early-development Tier 0 + emissions kit. The objective of this work is to use emissions characterization to gain insight into engine operation and mechanisms of pollutant formation for this family of engine, and identify areas of potential future engine emissions improvement. Results show that at the notches tested (notches 3–8) the largest contributor to particulate matter (PM)mass is insolubles (mostly elemental carbon), but that the soluble component of PM, comprising 14–32% of PM, is also significant. Gas chromatography (GC) analysis of the soluble portion shows that it is composed of 55–77% oil-like C22–C30+ hydrocarbons, with the remainder being fuel-like C9–C21 hydrocarbons. The emissions characterization suggests that advancing combustion timing should be effective in reducing PM mass by reducing the insoluble portion (elemental carbon) of PM at all notches. NOx will likely increase, but the current level of NOx is sufficiently below Tier 0+ limits to allow a moderate increase. Reducing engine oil consumption should also reduce PM mass at all notches, although to a smaller degree than measures that reduce the insoluble portion of PM.

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