汽车润滑系教学ppt

1、Engine Lubricating System nThe function of the lubrication systemnlubricating oilnMain components of the lubrication systemnOil cooler1The function of the lubrication system First of all, the oil forms a protective coating on the metal surface and prevents a metal to metal contact, thus reducing fri

2、ction and minimizing wear. Secondly, as the oil is fed to the various moving parts of the engine, it absorbs and carries the heat away from the engine parts. 2 The function of the lubrication system3Thirdly as the oil circulates through the moving parts of the engine, it tends to wash off dirt away

3、from the engine parts.Finally, the oil absorbs shocks between bearings and other engine parts, and forms a good seal between piston ring and cylinder walls.nChinas oil classification：（GB/T 7631.31995）nGasoline engine oil：nSC、SD、SE、SF、SG、SHnDiesel engine oil：nCC、CD、CD、CE、CFnTwo stroke gasoline engine

4、 oil：nERA、ERB、ERC、ERD 4lubricating oil The higher the level of lubricating oil, the stronger the ability to clean, can provide more effectively protect the engineGB/T 14906 a 1994 regulation: Single stage oil grades respectively 0 w, 5 w and 10 w, 15 w, 20 w, 25 w, 30, 40, 50 and 60; Multistage oil

5、brand mainly has 5 w / 20, 5 w / 30, 5 w / 40, 10 w / 30 and 10 w / 40, 15 w / 40 and 20 w / 40, etc.5lubricating oilWinter choose small oil viscosity; Choose big oil viscosity in summer.Main components of the lubrication systemnOil Pumpnfunction：nEnsure the oil circulating in the lubrication system

6、.nCan to ensure that any engine speed is high enough pressure to the lubrication part of the conveyor enough oilnclassification：nGear type：nAn external gear gear oil pumpnInscribed gear typenRotor type6nfunction：To prevent the oil pressure is too high.nInstallation position：Oil pump or the body of t

7、he main oil path.7The relief valve:Main components of the lubrication systemnfunction：nMetal abrasive dust, mechanical impurities in the oil and engine oil oxidenclassification：nFull flow：nIn series with the oil pump and main oil waynCar generally usednShunt type：nStrainer and the main oil series, f

8、ine filter and the main oil passage in parallelnVan usually adopt8Oil Filter:Main components of the lubrication systemOil Cooler9Oil radiator heat load of the larger engine, the devices for compulsory cooling on lubricating oil. To keep the oil at the best working temperature range.10nair-cooled：General installation in front of the engine cooling system radiator, use the wind cooling fan to make oil cooling.nWater cooled:Installed in the engine cooling water, when high oil temperature by