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About oil > Terms of Use > Quality indicators > Additives
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In modern internal combustion engines, usually used mixed lubrication system. Under this system, the most responsible sites of friction oil is fed by force, pressure, and some units are lubricated with small oil droplets, spray rapidly rotating parts, such as the crankshaft.
Oil margin is on the bottom of the crankcase. Crankcase oil gear pump is taken through the floating oil strainer and forced through the strainer into the overall oil highway that runs along the entire crankcase. Of the total oil pipeline is fed under pressure to the main bearings of the crankshaft and lubricates them. Drilling on the crankshaft of the engine oil from the surface of the main bearing supplied under pressure to the rod bearings.
Arising out of the connecting rod bearing oil is sprayed into the crankcase and lubricates the working surfaces of cylinders, piston pins and other friction parts. Camshaft bearings are lubricated well under pressure, for this purpose, the main bearings of the crankshaft by means of short tubes or bores are connected to the camshaft bearings.
In an internal combustion engine oil is subjected to high temperatures.
The piston is a kind of temperature limit. On one side of it, in the combustion chamber, and flame raging fire swirling vortices - the temperature ranges from 250 to 2500 ° C. On the other side of the piston, in said housing, the temperature ranges from 50 to 200 ° C.
Oil penetrating through the piston rings into the combustion chamber is subjected to high temperature, whereby a substantial part of it is combusted together with fuel. For this reason, the amount of oil in the system during operation of the engine is reduced continuously. The loss of oil is periodically updated, pouring fresh oil: in car engines - in the crankcase.
Rubbing oil on parts subjected to great pressure Specific pressure on the individual friction surfaces up to several hundred kilograms per square centimeter. Engine oil comes into contact with a variety of metals and alloys. Circulating oil encounters different types of steel, aluminum alloys, babbitt metal, lead bronze, silver alloys, and so on. The oil is always in contact with atmospheric oxygen. It is continually soiled by various mechanical impurities coke particles that penetrate the combustor, dust, wear particles and other details, Resulting in various kinds of motor clogging mechanical particles, carbonaceous deposits on some parts corrosion appears.
To facilitate operating conditions of the engine oil and to prevent premature deterioration of the oil during operation of the engine oil is cooled and filtered. Furthermore, ventilating crankcase vapors removed fuel, preventing it from entering into the oil. But if the oil is of poor quality, then all these measures do not provide a reliable engine.
Consequently, oil, but good lubricating properties, should have other no less important properties should not spoil quickly, should not form hazardous to health of various engine deposits, should not cause corrosion of parts and so on.
How do you know what properties the oil with which we have to deal? First of all it is necessary to study the qualitative characteristics of oil.
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