Cavitation erosion and wear behaviour of a boron cast iron cylinder liner under bio-fuel conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 79968-79970 ◽  
Author(s):  
Yufu Xu ◽  
Lulu Yao ◽  
Bin Zhang ◽  
Ka Tang ◽  
Bao Li ◽  
...  
Keyword(s):  
Cast Iron ◽  
Internal Combustion Engines ◽  
Cavitation Erosion ◽  
Cylinder Liner ◽  
Internal Combustion ◽  
Wear Behaviour ◽  
Combustion Engines ◽  
Near Future

The use of renewable bio-fuel in internal combustion engines is the trend for the near future.

scholarly journals Enhancing the Geometrical Performance Using Initially Conical Cylinder Liner in Internal Combustion Engines—A Numerical Study

2020 ◽  
Vol 10 (11) ◽  
pp. 3705
Author(s):  
Ahmad Alshwawra ◽  
Florian Pohlmann-Tasche ◽  
Frederik Stelljes ◽  
Friedrich Dinkelacker
Keyword(s):  
Internal Combustion Engines ◽  
Thermal Stresses ◽  
Numerical Study ◽  
Cylinder Liner ◽  
Internal Combustion ◽  
Friction Reduction ◽  
Cylindrical Shape ◽  
Combustion Engines ◽  
Cold State ◽  
The Impact

Reducing friction is an important aspect to increase the efficiency of internal combustion engines (ICE). The majority of frictional losses in engines are related to both the piston skirt and piston ring–cylinder liner (PRCL) arrangement. We studied the enhancement of the conformation of the PRCL arrangement based on the assumption that a suitable conical liner in its cold state may deform into a liner with nearly straight parallel walls in the fired state due to the impact of mechanical and thermal stresses. Combining the initially conical shape with a noncircular cross section will bring the liner even closer to the perfect cylindrical shape in the fired state. Hence, a significant friction reduction can be expected. For the investigation, the numerical method was first developed to simulate the liner deformation with advanced finite element methods. This was validated with given experimental data of the deformation for a gasoline engine in its fired state. In the next step, initially conically and/or elliptically shaped liners were investigated for their deformation between the cold and fired state. It was found that, for liners being both conical and elliptical in their cold state, a significant increase of straightness, parallelism, and roundness was reached in the fired state. The combined elliptical-conical liner led to a reduced straightness error by more than 50% compared to the cylindrical liner. The parallelism error was reduced by 60% to 70% and the roundness error was reduced between 70% and 80% at different liner positions. These numerical results show interesting potential for the friction reduction in the piston-liner arrangement within internal combustion engines.

scholarly journals Modeling the Fatigue Wear of the Cylinder Liner in Internal Combustion Engines during the Break-In Period and Its Impact on Piston Ring Lubrication

Lubricants ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 89
Author(s):  
Chongjie Gu ◽  
Renze Wang ◽  
Tian Tian
Keyword(s):  
Internal Combustion Engines ◽  
Cylinder Liner ◽  
Internal Combustion ◽  
Asperity Contact ◽  
Combustion Engines ◽  
Fatigue Wear ◽  
Wear Model ◽  
Surface Finishes ◽  
Liner Surface ◽  
Piston Ring Lubrication

In internal combustion engines, a significant portion of the total fuel energy is consumed to overcome the mechanical friction between the cylinder liner and the piston rings. The engine work loss through friction gradually reduces during the engine break-in period, as the result of liner surface topography changes caused by wear. This work is the first step toward the development of a physics-based liner wear model to predict the evolution of liner roughness and ring pack lubrication during the break-in period. Two major mechanisms are involved in the wear model: plastic deformation and asperity fatigue. The two mechanisms are simulated through a set of submodels, including elastoplastic asperity contact, crack initiation, and crack propagation within the contact stress field. Compared to experimental measurements, the calculated friction evolution of different liner surface finishes during break-in exhibits the same trend and a comparable magnitude. Moreover, the simulation results indicate that the liner wear rate or duration of break-in depends greatly on the roughness, which may provide guidance for surface roughness design and manufacturing processes.

scholarly journals HONING PERFORMANCE ANALYSIS WITH PART HEIGHT PEN SPEED AT INTERNAL COMBUSTION ENGINES REPAIR

2021 ◽  
pp. 34-37
Author(s):  
M. Yu. Polyanchikova ◽  
D. V. Selivanova ◽  
A. V. Kachalova ◽  
M. V. Nikitin
Keyword(s):  
Surface Layer ◽  
Performance Analysis ◽  
Internal Combustion Engines ◽  
Cylinder Liner ◽  
Internal Combustion ◽  
High Accuracy ◽  
Combustion Engines ◽  
Shape Accuracy ◽  
Surface Layer Quality ◽  
Tool Rotation

Both in the manufacture and repair of critical parts of mechanical engineering and engine building, great attention is paid to the formation of a trace on the surface, the surface layer quality and the geometric shape accuracy. However, methods of achieving high accuracy in the parts manufacture and their repair after operation differ significantly. The article assesses the possibility of implementing the honing method with a variable height speed of tool rotation (hon) patented by the author, and analyses the productivity of this method when repairing the internal combustion engines cylinder liner at a taper value of 0.20 mm.

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