润滑科技信息平台

Lubricating compositions for reducing low speed pre-ignition (LPSI) in spark-ignited internal combustion engines

专利摘要

A lubricating oil composition, a method of reducing low-speed pre-ignition (LSPI) in a direct-injected spark-ignited internal combustion engine, and a use of a lubricant composition to reduce LSPI events in such an engine. Preferably, the composition comprises a detergent package comprising a borated calcium detergent, wherein the detergent package provides a calcium content in the composition of at least 0.12 wt%, based on the weight of the composition, and wherein the borated calcium detergent provides a boron content in the composition of at least 100 ppmw, based on the weight of the composition. Optionally, the composition comprises a first detergent comprising a calcium detergent, and a second detergent comprising a borated calcium detergent. ......

基本信息

专利类型:
发明专利
申请/专利号:
CA2997166
申请日期:
2018-03-01
专利申请人:
英菲诺姆国际有限公司
分类号:
["C10M159/20","C10M139/00"]
发明/设计人:
HARTLEY, JOSEPH PETER ， YOUNG, ANNE WAI-YU
权利要求: CLAIMS: 1. A lubricating oil composition comprising a first detergent comprising a calcium detergent and a second detergent comprising a borated calcium detergent; wherein, the first and second detergents together provide a calcium content, as measured by ASTM 4.51, in the lubricating oil composition of at least 0.12 wt %, based on the weight of the lubricating oil composition, and wherein the second detergent provides a boron content, as measured by ASTM D5185, in the lubricating oil composition of at least 100 ppmw, based on the weight of the lubricating oil composition. 2. The lubricating oil composition according to claim 1, wherein the first detergent has a calcium content of from 2 wt % to 16 wt %õ based on the weight of the first detergent 3. The lubricating oil composition according to claim 1, wherein the first detergent has a calcium content of from 4 wt % to 10 wt %, based on the weight of the first detergent. 4. The lubricating oil composition according to any one of claims 1 to 3, wherein the second detergent has a calcium content of from 4 wt % to 16 wt %, based on the weight of the second detergent. 5. The lubricating oil composition according to any one of claims 1 to 3, wherein the second detergent has a calcium content of from 5 wt % to 10 wt %, based on the weight of the second detergent. 6. The lubricating oil composition according to any one of claims 1 to 5, wherein the second detergent has a boron content of from 1 wt % to 10 wt %, based on the weight of the second detergent. Date recue/Date received 2023-03-24 - 37 - 7. The lubricating oil composition according to any one of claims 1 to 5, wherein the second detergent has a boron content of from 2 wt % to 8 wt %, based on the weight of the second detergent. 8. The lubricating oil composition according to any one of claims 1 to 7, wherein the first and second detergents together provide a calcium content in the lubricating oil composition of at least 0.14 wt%, based on the weight of the lubricating oil composition. 9. The lubricating oil composition according to any one of claims 1 to 7, wherein the first and second detergents together provide a calcium content in the lubricating oil composition of at least 0.16 wt %, based on the weight of the lubricating oil composition. 10. The lubricating oil composition according to any one of claims 1 to 9, wherein the second detergent provides a boron content in the lubricating oil composition of at least 150 ppmw, based on the weight of the lubricating oil composition. 11. The lubricating oil composition according to any one of claims 1 to 9, wherein the second detergent provides a boron content in the lubricating oil composition of at least 180 ppmw, based on the weight of the lubricating oil composition. 12. The lubricating oil composition according to any one of claims 1 to 11, wherein the first detergent comprises a calcium phenate, a calcium sulfonate, a calcium salicylate, or a combination thereof. 13. The lubricating oil composition according to any one of claims 1 to 11, wherein the first detergent comprises a calcium sulfonate, a calcium salicylate, or a combination thereof. Date recue/Date received 2023-03-24 - 38 - 14. The lubricating oil composition according to any one of claims 1 to 13, wherein the second detergent comprises a borated calcium phenate, a borated calcium sulfonate, a borated calcium salicylate, or a combination thereof. 15. The lubricating oil composition according to any one of claims 1 to 13, wherein the second detergent comprises a borated calcium sulfonate, a borated calcium salicylate, or a combination thereof. 16. The lubricating oil composition according to any one of claims 1 to 15, wherein the second detergent comprises a borated analogue of the calcium detergent of the first detergent. 17. The lubricating oil composition according to any one of claims 1 to 16, wherein the second detergent comprises calcium and boron in a calcium wt % to boron wt % ratio of 1:Z, based on the weight of the second detergent, wherein Z is at least 0.1. 18. The lubricating oil composition according to any one of claims 1 to 16, wherein the second detergent comprises calcium and boron in a calcium wt % to boron wt % ratio of 1:Z, based on the weight of the second detergent, wherein Z is at least 0.2. 19. The lubricating oil composition according to claim 17, wherein Z is from 0.1 to 4. 20. The lubricating oil composition according to claim 17 or 18, wherein Z is from 0.2 to 3. 21. The lubricating oil composition according to any one of claims 1 to 20, wherein the .. first detergent and the second detergent are present in a ratio of first detergent wt % to second detergent wt % of 1:X, based on the weight of the lubricating oil composition, wherein X is at least 0.1. 22. The lubricating oil composition according to any one of claims 1 to 20, wherein the first detergent and the second detergent are present in a ratio of first detergent wt % to second Date recue/Date received 2023-03-24 detergent wt % of 1:X, based on the weight of the lubricating oil composition, wherein X is at least 0.2. 23. The lubricating oil composition according to claim 21, wherein X is from 0.1 to 10. 24. The lubricating oil composition according to claim 21 or 22, wherein X is from 0.2 to 5. 25. The lubricating oil composition according to any one of claims 1 to 24, wherein at least 50 % of the boron content of the lubricating oil composition is provided by the second detergent. 26. The lubricating oil composition according to any one of claims 1 to 24, wherein at least 75 %, of the boron content of the lubricating oil composition is provided by the second detergent. 27. The lubricating oil composition according to claim 25 or 26, wherein 100% of the boron content of the lubricating oil composition is provided by the second detergent. 28. A method of reducing low-speed pre-ignition (LSPI) events in a direct- injection spark-ignition internal combustion engine comprising lubricating a crankcase of the engine with a lubricating oil composition, the composition comprising a detergent package comprising a borated calcium detergent and a further detergent, wherein the further detergent is a calcium detergent; wherein, the detergent package provides a calcium content, as measured by ASTM 4951, in the lubricating oil composition of at least 0.12 wt %, based on the weight of the lubricating oil composition, and wherein the borated calcium detergent provides a boron content, as measured by ASTM D5185, in the lubricating oil composition of at least 100 ppmw, based on the weight of the lubricating oil composition. Date recue/Date received 2023-03-24 - 40 - 29. The method according to claim 28, wherein, in operation, the engine generates a break mean effective pressure level of greater than 1,500 kPa, at engine speeds of from 1,000 to 2,500 rotations per minute (rpm). 30. The method according to claim 28, wherein, in operation, the engine generates a break mean effective pressure level of greater than 2,000 kPa, at engine speeds of from 1,000 to 2,500 rotations per minute (rpm). 31. The method according to claim 28, wherein, in operation, the engine generates a break mean effective pressure level of greater than 1,500 kPa, at engine speeds of from 1,000 to 2,000 rotations per minute (rpm). 32. The method according to claim 28, wherein, in operation, the engine generates a break mean effective pressure level of greater than 2,000 kPa, at engine speeds of from 1,000 to 2,000 rotations per minute (rpm). 33. The method according to any one of claims 28 to 32, wherein the borated calcium detergent comprises a borated overbased calcium detergent and has a TBN of at least 150, as measured by ASTM D2896. 34. The method according to any one of claims 28 to 32, wherein the borated calcium detergent comprises a borated overbased calcium detergent and has a TBN of at least 250, as measured by ASTM D2896. 35. The method according to any one of claims 28 to 34, wherein the lubricating oil composition is the lubricating oil composition as defined in any one of claims 2 to 27. 36. Use of a detergent package comprising a borated calcium detergent and a further detergent, wherein the further detergent is a calcium detergent, in a lubricating oil composition to reduce low-speed pre-ignition (LSPI) events when the composition lubricates a crankcase Date recue/Date received 2023-03-24 of a direct injection-spark ignition internal combustion engine, wherein, the detergent package provides a calcium content, as measured by ASTM 4951, in the lubricating oil composition of at least 0.12 wt %, based on the weight of the lubricating oil composition, and wherein the borated calcium detergent provides a boron content, as measured by ASTM D5185, in the lubricating oil composition of at least 100 ppmw, based on the weight of the lubricating oil composition. 37. The use according to claim 36, wherein, in operation, the engine generates a break mean effective pressure level of greater than 1,500 kPa, at engine speeds of from 1,000 to 2,500 rotations per minute (rpm). 38. The use according to claim 36, wherein, in operation, the engine generates a break mean effective pressure level of greater than 1,500 kPa, at engine speeds of from 1,000 to 2,000 rotations per minute (rpm). 39. The use according to claim 36, wherein, in operation, the engine generates a break mean effective pressure level of greater than 2,000 kPa, at engine speeds of from 1,000 to 2,500 rotations per minute (rpm). 40. The use according to claim 36, wherein, in operation, the engine generates a break mean effective pressure level of greater than 2,000 kPa, at engine speeds of from 1,000 to 2,000 rotations per minute (rpm). 41. The use according to any one of claims 36 to 40, wherein the lubricating composition is the lubricating oil composition as defined in any one of claims 2 to 26. Date recue/Date received 2023-03-24