Lubrication System
The engine lubrication system supplies oil to all the friction surfaces between the engine moving parts.If the lubrication system did not supply these moving components with oil ,friction would quickly destroy these surfaces.
The oil reduce friction between moving components, which increse engine power and efficiency.Engine components are lubricated, cooled, cleaned, sealed by the oil in the lubrication system.The oil also reduce wear on engine components to a minimum.The engine lubrication system is designed to store,clean, and circulate engine oil throught the engine.
The purpose of the lubrication system is to circulate oil between moving engine.Oil between the parts prevents metal-to-metal contact which causes friction and wear.The circulating oil has other important jobs.It carries heat away from engine parts, clean engine parts, and helps the piston rings seal in compression pressures.
Oil is circulated through the engine by an oil pump.Most oil pumps have two small gears that mesh with each other.A pressure-regulator valve in the pump is used to prevent the lubrication system from reaching too high a pressure.The oil pump pulls oil up from the oil pan through the pick-up screen. The screen any large particles of dirt so that the oil entering the pump is fairly clean.The pump then directs the oil through an oil filter, which strains any remaining dirt out of the oil; the oil entering the engine lubrication passages should be clean.
All the oil that enters the pump nust pass through the screen, which prevents any large particles of dirt from entering the pump. The engine oil pump causes the oil to flow throught the engine. The resistance to this flow results in a pressure builup. After the oil passes through the pump, it goes to the oil filter assembly.
When the oil leaves the filter assembly, it enters the passages in the cylinder block. These passageways , or main galleries, run the length of the cylinder block. Oil flows down from the main galleries to the crankshaft main bearings.It lubricates these and then flows through the hollow crankshaft, lubricating each of the connecting-rod bearings.
Oil also travels up from the main gallery, through the block to the camshaft bearings, to each of the cam lobe areas, and into each of the valve lifters.It is routed through the lifters and up the hollow pushrods.Finally, it goes out the top of the pushrods, where it provides lubrication for the rocker arms and valve stems.
The rotating crankshaft throws off oil, which hits the cylinder wall.The piston and piston rings receive oil and distribute it over the cylinder wall for lubrication. This oil then runs back down into the oil pan to be used again.
Engine oil
Engine oil has several important jobs in the engine.First, it must be circulated between moving engine parts to prevent matal-to-metal contact produces wear.Oil between moving parts allows them to move easily, with less friction.The lower the friction of an engine, the more power it can develop.
The circulating oil also cools the engineby carrying heat away from hot engine components, and cleans or flushes dirt and deposits off the engine parts.Finally, oil circulated on the cylinder wall seals the rings, improving the engine’s compression.
Oil filter
The oil filter assembly is located on the outside of the cylinder block where it can be replaced easily.After the oil passese through the filter element, it reenters the engine block and is then circulated into the lubrication passages.The oil filter is equipped with a bypass valve assembly.The bypass valve is used to protect the engine from a clogged filter.
The oil filter’s job is to clean the oil before it gets to the engine parts.It is changed when you change engine oil.
Oil pan
An oil pan is bolted to the bottom of the engine.The deep part of the oil pan houses an oil pump and pick-up screen.The pan also collects oil that runs off engine parts after lubrication. A plug in the bottom of the oil pan is used to drain the oil at required intervals.The oil pan stores and collects the oil. Engines usually have an oil pan that holds 4,5, or , 6 quarts.A pick-up screen in the oil pan is connected by a pipe to the inlet of the oil pump.
auther:Candywww.sinodiesel.com
