A Novel Approach to Model the Lubrication and Friction between the Twin-Land Oil Control Ring and Liner with Consideration of Micro Structure of the Liner Surface Finish in Internal Combustion Engines

2008 ◽  
Author(s):  
Haijie Chen ◽  
Yong Li ◽  
Tian Tian
Keyword(s):  
Surface Finish ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Micro Structure ◽  
Novel Approach ◽  
Liner Surface

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.

Laser Ignition in Internal Combustion Engines- a Novel Approach Based on Advanced Lasers

2005 ◽  
Author(s):  
Martin Weinrotter ◽  
Herbert Kopecek ◽  
Josef Graf ◽  
Johann Klausner ◽  
Günther Herdin ◽  
...  
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Laser Ignition ◽  
Combustion Engines ◽  
Novel Approach
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