The use of a motored engine to study piston-ring wear and engine friction

Wear ◽  
1965 ◽  
Vol 8 (2) ◽  
pp. 154-155
Keyword(s):  
Piston Ring ◽  
Engine Friction ◽  
Motored Engine

Investigations of Piston Ring Pack and Skirt Contributions to Motored Engine Friction

2008 ◽  
Vol 1 (1) ◽  
pp. 723-734 ◽  
Author(s):  
P. J. Shayler ◽  
D. K. W. Leong ◽  
I. G. Pegg ◽  
M. Murphy
Keyword(s):  
Piston Ring ◽  
Engine Friction ◽  
Piston Ring Pack ◽  
Ring Pack ◽  
Motored Engine

Further Experimental Investigation of Motored Engine Friction Using Shunt Pipe Method

2019 ◽  
Author(s):  
Carl Caruana ◽  
Mario Farrugia ◽  
Gilbert Sammut ◽  
Emiliano Pipitone
Keyword(s):  
Experimental Investigation ◽  
Engine Friction ◽  
Motored Engine

An Integrated Model of Ring Pack Performance

1991 ◽  
Vol 113 (3) ◽  
pp. 382-389 ◽  
Author(s):  
R. Keribar ◽  
Z. Dursunkaya ◽  
M. F. Flemming
Keyword(s):  
Internal Combustion Engines ◽  
Piston Ring ◽  
Engine Speed ◽  
Integrated Model ◽  
Design Parameters ◽  
Combustion Engines ◽  
Predictive Tool ◽  
Engine Friction ◽  
Piston Ring Pack ◽  
Ring Pack

This paper describes an integrated model developed for the detailed characterization and simulation of piston ring pack behavior in internal combustion engines and the prediction of ring pack performance. The model includes comprehensive and coupled treatments of (1) ring-liner hydrodynamic and boundary lubrication and friction; (2) ring axial, radial, and (toroidal) twist dynamics; (3) inter-ring gas dynamics and blowby. The physics of each of these highly inter-related phenomena are represented by submodels, which are intimately coupled to form a design-oriented predictive tool aimed at the calculation of ring film thicknesses, ring motions, land pressures, engine friction, and blowby. The paper also describes the results of a series of analytical studies investigating effects of engine speed and load and ring pack design parameters, on ring motions, film thicknesses, and inter-ring pressures, as well as ring friction and blowby.

Piston Ring Coating Reduces Gasoline Engine Friction

MTZ worldwide ◽  
2012 ◽  
Vol 73 (5) ◽  
pp. 40-43 ◽  
Author(s):  
Marcus Kennedy ◽  
Steffen Hoppe ◽  
Johannes Esser
Keyword(s):  
Piston Ring ◽  
Gasoline Engine ◽  
Engine Friction

Predictive tool for frictional performance of piston ring-pack/liner conjunction

2019 ◽  
Vol 13 (3) ◽  
pp. 5513-5527
Author(s):  
J. W. Tee ◽  
S. H. Hamdan ◽  
W. W. F. Chong
Keyword(s):  
Film Thickness ◽  
Mathematical Models ◽  
Piston Ring ◽  
Published Data ◽  
Predictive Tool ◽  
Frictional Losses ◽  
Fundamental Understanding ◽  
Minimum Film Thickness ◽  
Piston Ring Pack ◽  
Ring Pack

Fundamental understanding of piston ring-pack lubrication is essential in reducing engine friction. This is because a substantial portion of engine frictional losses come from piston-ring assembly. Hence, this study investigates the tribological impact of different piston ring profiles towards engine in-cylinder friction. Mathematical models are derived from Reynolds equation by using Reynolds’ boundary conditions to generate the contact pressure distribution along the complete piston ring-pack/liner conjunction. The predicted minimum film thickness is then used to predict the friction generated between the piston ring-pack and the engine cylinder liner. The engine in-cylinder friction is predicted using Greenwood and Williamson’s rough surface contact model. The model considers both the boundary friction and the viscous friction components. These mathematical models are integrated to simulate the total engine in-cylinder friction originating from the studied piston ring-pack for a complete engine cycle. The predicted minimum film thickness and frictional properties from the current models are shown to correlate reasonably with the published data. Hence, the proposed mathematical approach prepares a simplistic platform in predicting frictional losses of piston ring-pack/liner conjunction, allowing for an improved fundamental understanding of the parasitic losses in an internal combustion engine.

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