Ex: S. Ce système tient compte : - des propriétés des huiles - des conditions de service - de la qualité des carburants - de la conception des moteurs Ex A. Documents similaires à Système de lubrification et de graissage. Mounir Azim. Elabed Ahmed. Guy Effa. Abo Kolou. AAli Mana.

Houssam Al Ahmar. Amine Saidi. Aliyine Ethmane. JàMàl Mejor. Khabtane Abdelhamid. Semlali Zakaria.

LUBRIFICATION.

Oumayma Shili. Odium Immortalis. Rauf Gebreel. Ayoub Dadda. Populaire dans Engineering. Eren Musab Onder. Simo Rd. Abdel Hakim M. Hraf Ghz. Clara Neves. Idrissi Med. Engine friction is affected by the stroke-to-bore ratio because of two competing effects: Crankshaft bearing friction and power-cylinder friction.

As the stroke-to-bore ratio decreases, the bearing friction increases because the larger piston area transfers larger forces to the crankshaft bearings.

Rides to dr appointments

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Ce contenu est-il inapproprié? Signaler ce document. Signaler comme contenu inapproprié. Télécharger maintenant. Titres liés. Élément précédent du carrousel Élément suivant du carrousel. Notice: Applications, hearings, determinations, etc. Passer à la page. Rechercher à l'intérieur du document. Lubrication regimes in the engine The key operating tribological parameter in a powertrain system is the lubricant film thickness separating the interacting component surfaces. Geometry of the lubricated pair piston rings-cylinder wall The mixed lubrication regime for the ring: The total load acting in the ring in radial direction due to the sum of the hydrodynamic lubrication FH force and the solid-to-solid interactions FC along the asperities of the surfaces.

The Friction Coefficient The friction coefficient f can be calculated by the following equation: Both the components, FC and FH, show a strongly dependence on the minimum nominal distance between the ring and the cylinder wall.

Effect of Cylinder Geometry on Frictional Losses Engine friction is affected by the stroke-to-bore ratio because of two competing effects: Crankshaft bearing friction and power-cylinder friction.

Lubrication regimes ppt

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