发动机基础技术培训.pptVIP

增强抗氧化性 降低挥发性 控制灰分体系 (Low SAPS) 低黏度趋势 使用高级别基础油 (GroupII,III) 的必要性增加 润滑油要求 发动机润滑油产品发展趋势 (延长换油周期) (燃料节省) (限制尾气排放) 美国汽车工程师协会(SAE)发动机油粘度分类 SAE 粘度等级 低温动力粘度mPa·s 边界泵送粘度mPa·s 最大100℃运动粘度mm2/s 高温高剪切粘度 mPa·s 最大 最大 最小 最大 最小 0W 6200（-35℃） 60000（-40℃） 3.8 - - 5W 6600（-30℃） 60000（-35℃） 3.8 - - 10W 7000（-25℃） 60000（-30℃） 4.1 - - 15W 7000（-20℃） 60000（-25℃） 5.6 - - 20W 9500（-15℃） 60000（-20℃） 5.6 - - 25W 13000（-10℃） 60000（-15℃） 9.3 - - 20 - - 5.6 ＜9.3 2.6 30 - - 9.3 ＜12.5 2.9 40 - - 12.5 ＜16.3 2.9(0W-40，5W-40，10W-40) 40 - - 12.5 ＜16.3 3.7 (15W-40，20W-40，25W-40，40) 50 - - 16.3 ＜21.9 3.7 * * * * * * E7: 欧洲ACEA 必威体育精装版的重负荷柴油机油标准.稳定的高性能发动机油, 对活塞的清洁和孔抛光有较好的控制. 在抗磨损和涡轮增压器沉积物的控制,烟怠的处理和稳定性方面的性能都有很大的提高.推荐使用于符合欧I,欧II,欧III和欧IV排放要求的高压缩比和运行在非常苛刻条件下的柴油发动机,根据制造商的推荐适当延长换油周期.适用于大部分具有EGR和安装有SCR降低氮氧化合物Nox装置的发动机 * * * * After fuel and oxygen enter the combustion chamber #, the mixture is exploded by spark ignition in gasoline engine or high pressure and temperature in diesel engine.# The explosion energy make the engine move, and exhaust gases like carbon dioxide, water, and others are produced. # For this engine operation friction between moving parts, wear on the metal-to-metal contacting point, heat from combustion and friction, unburned component from combustion chamber, sludge and deposit are generated. # This means the circumstance inside of engine is extremely severe and all engine parts are gotten too much stress. * For the engine oil having 4 fundamental functions, reducing friction, reducing wear, cooling and eliminating contaminant many vehicle manufacturers, such as VW, BMV, Ford, Benz, Hyundai and etc and driving ambient from cold winter to hot desert require 6 performances. # Summarizing the engine oil requirements, It must have optimum viscosity and higher viscosity index considered not only wear but also fuel economy. Excellent oxidation stability for use long time. Good detergency and dispersancy for keeping engine clean. Good low temperature fluidity for easy starti