Piston/ring Assembly Friction Measurement and Modeling PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Piston/ring Assembly Friction Measurement and Modeling PDF full book. Access full book title Piston/ring Assembly Friction Measurement and Modeling by Shyh-Shyan Lin. Download full books in PDF and EPUB format.
Author: Shyh-Shyan Lin
Publisher:
ISBN:
Category :
Languages : en
Pages : 296
Get Book Here
Book Description
Author: Shyh-Shyan Lin
Publisher:
ISBN:
Category :
Languages : en
Pages : 296
Get Book Here
Book Description
Author: Takaharu Goto
Publisher:
ISBN:
Category : Friction
Languages : en
Pages : 10
Get Book Here
Book Description
Author: Richard Stanley
Publisher:
ISBN:
Category :
Languages : en
Pages : 596
Get Book Here
Book Description
Author: Yooseok Chung
Publisher:
ISBN:
Category : Mechanical wear
Languages : en
Pages : 260
Get Book Here
Book Description
Author: H. Mehmet Uras
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 14
Get Book Here
Book Description
Author: Richard Stanley
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
Get Book Here
Book Description
Author: Haijie Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 133
Get Book Here
Book Description
Piston ring packs are used in internal combustion engines to seal both the high pressure gas in the combustion chamber and the lubricant oil in the crank case. The interaction between the piston ring pack and the cylinder bore contributes substantially to the total friction power loss for IC engines. The aim of this thesis work is to advance the understanding of the ring liner lubrication through numerical modeling. A twin-land oil control ring lubrication model and a top two-ring lubrication model are developed based on a deterministic approach. The models take into consideration the effect of both the liner finish micro geometry and the ring face macro profile. The liner finish effect is evaluated on a 3D deterministically measured liner finish patch, with fully-flooded oil supply condition to the oil control rings and starved oil supply condition to the top two rings. Correlations based on deterministic calculations and proper scaling are developed to connect the average hydrodynamic pressure and friction to the critical geometrical parameters and operating parameters so that cycle evaluation of the ring lubrication can be performed in an efficient manner. The models can be used for ring pack friction prediction, and ring pack/liner design optimization based on the trade-off of friction power loss and oil consumption. To provide further insights to the effect of liner finish, a wear model is then developed to simulate the liner surface geometry evolution during the break-in/wear process. The model is based on the idea of simulated repetitive grinding on the plateau part of the liner finish using a random grinder. The model successfully captures the statistic topological features of the worn liner roughness. Combining the piston ring pack model and the liner finish wear model, one can potentially predict the long term ring pack friction loss. Finally the thesis covers the experimental validation of the twin-land oil control ring model using floating liner engine friction measurements. The modeled ring friction is compared with the experimental measurement under different ring designs and liner finishes. The result shows that the model in general successfully predicts the friction force of the twin-land oil control ring/liner pair.
Author: H. MEHMET. URAS
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Mid-stroke frictional power losses dominated due to high velocities - the molybdenum friction modifier had a modest effect.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 159
Get Book Here
Book Description
Piston and ring assembly friction has been measured in a single cylinder Cummins 903 diesel. The engine was motored and fired, cooled and uncooled. For uncooled operation, plasma sprayed chromium oxide ring and liner coatings were employed with a synthetic lubricant. The Instantaneous IMEP and Fixed Sleeve methods were used for the friction measurement on a crank angle by a crank angle basis, with a cycle average of about 1.5 to 4 psi fmep. Considerable effort was expended in developing the measurement techniques, with a major effort on the Instantaneous IMEP method. In a parallel effort a bench type, heated, piston ring and liner wear simulator was developed. This permitted rapid screening of promising candidate materials for uncooled engine tests. The plasma sprayed chromium oxide coatings were found to be best.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 902
Get Book Here
Book Description
