Lubrication System of vehicles,working , additives, methods.

                               Lubrication System 

Lubricate definition:

Reduces Friction by creating a thin film(Clearance) between moving parts (Bearings and journals)

Purpose of Lubrication System:

SEALS: 

• The oil helps form a gas tight seal between piston rings and cylinder walls (Reduces Blow-By).
• Internal oil leak (blow-by) will result in BLUE SMOKE at the exhaust pipe.

CLEANS:

• As it circulates through the engine, the oil picks up metal particles and carbon, and brings them back down to the pan.

COOLS:

• Picks up heat when moving through the engine and then drops into the cooler oil pan, giving up some of this heat.

ABSORB SHOCK:

When heavy loads are imposed on the bearings, the oil

helps to cushion the load.

The additives in oil helps in absorbing the contaminants

that enter the lubrication system.

Functions of Lubricant :

•Lubricant reduces friction between moving part

•It reduces wear and tear of the moving parts.

•It minimizes power loss due to friction.

•It provides cooling effect.

–While lubricating it also carries some heat from the moving parts and delivers it to the surroundings through the bottom of the engine(crank case).

•It carries away the contamination (carbon and metal chips) from the cylinder.

•Helps in providing additional gas sealing in the cylinder.

•It helps reduce noise created by the moving parts.

Purpose of Lubrication:

•Friction refers to the forces acting between mechanical components due to their relative motion and to the forces on and by fluids when they move through the engine.

•A percentage of the power generated within the engine cylinders is lost to friction, with a reduction in the resulting brake power obtained off the crankshaft.

•Accessories that are run off the engine also reduce crankshaft output and are often classified as part of the engine friction load.

•To greatly reduce resistance of surface-to-surface motion, lubricating oil is added to the space between the surfaces.

Lubricant Additives;

Lubricants are added with additives such as

–Anti foam agents

–Oxidation inhibitors

–Pour point depressant

–Anti rust agents

–Detergents

–Anti wear agents

–Friction reducers

–Viscosity index improvers