申请人:Afton Chemical Corporation
公开号:US10323205B2
公开(公告)日:2019-06-18
A method for reducing timing chain stretch in an engine comprising a step of lubricating said timing chain with a lubricating oil composition that includes a major amount of a base oil; and a minor amount of an additive package including (a) at least one overbased calcium detergent, (b) at least one borated dispersant, (c) a metal dialkyl dithiophosphate, and (d) at least one molybdenum compound. The lubricating oil composition has a TBN value of at least 7.5 mg KOH/g of the lubricating oil composition, at least 80 ppm of molybdenum, based on the total weight of the lubricating oil composition, a weight ratio of total calcium in the lubricating oil composition to total molybdenum in the lubricating oil composition of less than 8.4; and a weight ratio of nitrogen from the dispersant in the lubricating composition to total boron in the lubricating oil composition of from 2.6 to 3.0.
一种用于减少发动机中正时链条拉伸的方法,包括用润滑油组合物润滑所述正时链条的步骤,该润滑油组合物包括主要量的基础油;和少量的复合添加剂,复合添加剂包括 (a) 至少一种过基钙清净剂,(b) 至少一种硼化分散剂,(c) 金属二烷基二硫代磷酸酯,和 (d) 至少一种钼化合物。润滑油组合物的 TBN 值至少为 7.5 毫克 KOH/克润滑油组合物,基于润滑油组合物总重量的钼至少为 80 ppm,润滑油组合物中总钙与润滑油组合物中总钼的重量比小于 8.4;润滑油组合物中分散剂产生的氮与润滑油组合物中总硼的重量比为 2.6 至 3.0。