公开(公告)号：US20090291868A1

公开(公告)日：2009-11-26

申请号：US12465685

申请日：2009-05-14

Applicant: James C. Dodd ,  Jeremy R. Spencer

Inventor： James C. Dodd ,  Jeremy R. Spencer

IPC: C10M159/20

CPC classification number: C10M159/22 ,  C10M169/042 ,  C10M2203/1025 ,  C10M2207/144 ,  C10M2207/262 ,  C10N2230/04 ,  C10N2230/70 ,  C10N2240/102

Abstract: A trunk piston marine engine lubricating oil composition for a medium-speed compression-ignited marine engine comprises, in a major amount, an oil of lubricating viscosity containing 50 mass % or more of a Group II basestock. and, in respective minor amounts, (A) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent having a basicity index of 4.5 or less, and (B) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent having a basicity index of greater than 4.5. The ratio of deterrent (A) to detergent (B), both expressed as mass of active ingredient, is in the range from 0.5 to 15. The trunk piston marine engine lubricating oil composition has a TBN (using ASTM D2896) of 20 to 60.

Abstract translation: 用于中速压缩点火的船用发动机的躯干活塞船用发动机润滑油组合物主要包括含有第二类基础油料的50质量％以上的润滑粘度的油。 （A）碱度指数为4.5以下的高碱性金属烃基取代羟基苯甲酸盐洗涤剂，（B）碱度指数大于4.5的高碱性金属烃基取代羟基苯甲酸盐洗涤剂。 阻力（A）与洗涤剂（B）的比值（均以活性成分的质量表示）在0.5至15的范围内。主干活塞船用发动机润滑油组合物的TBN（使用ASTM D2896）为20至60 。