用台架试验研究CK-4 柴油机油的性能变化

Study on Performances Change of CK-4 Diesel Engine Oil by Rig Test

《柴油机油换油指标》:GB/T 7607—2010标准中规定了CH-4及以下规格的柴油机油的换油指标,但对新一代CK-4规格的柴油机油却没有明确的换油指标。用GB/T 7607—2010标准规定的换油指标来指导CK-4柴油机油换油需要探讨。用“国VI”排放柴油发动机台架试验对CK-4柴油机油(CK-410W-40柴油机油)在试验过程中的100℃运动黏度,酸值,碱值,pH值及磨损铁元素含量等进行了监测,对CK-4柴油机油在试验过程中的性能变化进行研究。在发动机台架试验中,当试验进行到相当于80 Mm的行驶里程时,CK-4柴油机油虽然达到了GB/T 7607—2010标准中CH-4柴油机油的换油限值,但摩擦副仍处于正常的磨损状态,润滑性能较好。i-pH值能够更好地反映CK-4柴油机油中清净剂的消耗程度,体现了柴油机油的酸中和能力,可指导油品更换。(图5表2参考文献6)

The oil change indicators for CH-4 and below diesel engine oils were specified in“Oil Change Indicators for Diesel Engine Oils”:the GB/T 7607—2010 standard,but there was no clear oil change indicator for the new generation of CK-4 Diesel engine oils.It was necessary to explore how to use the oil change indicators specified in the GB/T 7607—2010 standard to guide the oil change of CK-4 Diesel engine oil.The 100℃kinematic viscosity,acid number,base number,pH number,and wear iron content of CK-4 Diesel engine oil(CK-410W-40 diesel engine oil)during the test were monitored using a“national VI”emission diesel engine rig test.The performance changes of CK-4 Diesel engine oil during the test were studied.In the engine rig test,when the test reached a mileage equivalent to 80 Mm,although the CK-4 Diesel oil met the oil change limit of CH-4 diesel oil in the GB/T 7607—2010 standard,the frictional pair was still in a normal wear state and had good lubrication performance.The i-pH number could better reflect the consumption of detergent in CK-4 Diesel engine oil,reflect the acid neutralization ability of Diesel engine oil,and guide oil replacement.(Charts5 Tables2 References6)