润滑科技信息平台

机械工程学会摩擦学分会固体润滑国家重点实验室摩擦学学报

船用发动机润滑

专利摘要

低S船用燃料筒状活塞柴油发动机润滑剂包含高碱性金属清净剂; 二烃基二硫代磷酸锌; 任选的胺类抗氧化剂; 和硼酸化无灰分散剂。该润滑剂表现出改进的热稳定性和氧化稳定性以及改进的高温去污力。 ......

基本信息

专利类型:
发明专利
申请/专利号:
US15/928178
申请日期:
2018-03-22
专利申请人:
分类号:
C10M141/10 ; C10M129/54 ; C10M133/12 ; C10M133/44 ; C10M137/10 ; C10M169/04 ; C10N30/04 ; C10N30/06 ; C10N30/10 ; C10N30/00 ; C10N40/25 ; C10N60/14
发明/设计人:
权利要求: 1. A low sulfur marine fuel trunk piston diesel engine lubricating oil composition comprising or made of admixing(A) a Group I base oil in a major amount; and in respective minor amounts;(B) an overbased detergent consists essentially of an overbased calcium salicylate and an overbased calcium sulfonate; wherein the soap level of the composition is from 1.49 to 1.747 mass %;(C) a primary and/or secondary zinc dialkyldithiophosphate in an amount of 352 to 387 ppm by weight in terms of P atoms;the aminic antioxidant is an alkylated diphenylamine;(D) a borated ashless dispersant comprising a borated succinimide and is present in an amount of 50 to 65 ppm by weight in terms of B atoms; andwherein the TBN of the composition is from 11.9 to 15 mg KOH/g; andwherein the composition is essentially free of aminic antioxidant.2. The composition of claim 1, wherein the composition exhibits three or more of the following characteristics:a Komatsu Hot Tube Test (KHTT) score at 320° C. of at least 1.5;a peak area increase (PAI) after 216 hours in a GFC Oxidation Test of less than 505;a % KV100 increase after 216 hours in a GFC Oxidation Test of less than 60.5;a % TBN remaining after 216 hours in a GFC Oxidation Test of greater than 40; anda wear protection temperature, as measured using a High Frequency Reciprocating Rig (HFRR), of greater than 295° C.3. The composition of claim 2, wherein the composition exhibits four or more of the characteristics.4. The composition of claim 2, wherein the composition exhibits a peak area increase (PAI) after 216 hours in a GFC Oxidation Test of 361 or less, a % KV100 increase after 216 hours in a GFC Oxidation Test of 36 or less, and/or a wear protection temperature, as measured using HFRR, of 354° C. or higher.5. The composition of claim 3, wherein the composition exhibits a peak area increase (PAI) after 216 hours in a GFC Oxidation Test of 361 or less, a % KV100 increase after 216 hours in a GFC Oxidation Test of 36 or less, and/or a wear protection temperature, as measured using HFRR, of 354° C. or higher.6. A method for operating a four-stroke trunk piston engine comprising the steps of:(i) providing the engine fueled with a low sulfur marine fuel; and(ii) lubricating the engine with a lubricating oil composition as claimed in claim 1.7. The method of claim 6 where the low sulfur marine fuel is a distillate fuel.8. The method of claim 6 where the fuel has a sulfur content of equal to or less than 0.5 mass % in terms of S atoms of sulfur.9. The method of claim 6 where the low sulfur marine fuel is a distillate fuel and the fuel has a sulfur content of equal to or less than 0.5 mass % in terms of S atoms of sulfur.10. A method for operating a four-stroke trunk piston engine comprising the steps of:(i) providing the engine fueled with a low sulfur marine fuel; and(ii) lubricating the engine with a lubricating oil composition as claimed in claim 2.11. A method for operating a four-stroke trunk piston engine comprising the steps of:(i) providing the engine fueled with a low sulfur marine fuel; and(ii) lubricating the engine with a lubricating oil composition as claimed in claim 3.12. A method for operating a four-stroke trunk piston engine comprising the steps of:(i) providing the engine fueled with a low sulfur marine fuel; and(ii) lubricating the engine with a lubricating oil composition as claimed in claim 4.13. A method for operating a four-stroke trunk piston engine comprising the steps of:(i) providing the engine fueled with a low sulfur marine fuel; and(ii) lubricating the engine with a lubricating oil composition as claimed in claim 5.14. The composition of claim 2, wherein the composition exhibits a Komatsu Hot Tube Test (KHTT) score at 320° C. of up to 3.15. The composition of claim 1, wherein the composition exhibits three or more of the following characteristics:a Komatsu Hot Tube Test (KHTT) score at 320° C. of at least 1.5;a peak area increase (PAI) after 216 hours in a GFC Oxidation Test of less than 505;a % KV100 increase after 216 hours in a GFC Oxidation Test of less than 71;a % TBN remaining after 216 hours in a GFC Oxidation Test of greater than 40; anda wear protection temperature, as measured using a High Frequency Reciprocating Rig (HFRR), of greater than 295° C.16. The composition of claim 15, wherein the composition exhibits four or more of the characteristics.