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Lubricants with Magnesium and their Use for Improving Low Speed Pre-ignition
| Content Provider | The Lens |
|---|---|
| Abstract | A lubricating oil composition and method of operating a boosted internal combustion engine. The lubricating oil composition includes greater than 50 wt. % of a base oil, one or more overbased calcium-containing detergents having a TBN greater than 225 mg KOH/g and one or more magnesium-containing detergents. A total amount of calcium from the one or more overbased calcium-containing detergents is from 900 ppm to less than 2400 ppm by weight, and a total amount of magnesium from the one or more magnesium-containing detergents is from 50 ppm to 500 ppm by weight, both based on a total weight of the lubricating oil composition. The lubricating oil composition and the method of using it are effective to reduce low speed pre-ignition events in a boosted internal combustion engine lubricated with the lubricating oil composition. |
| Related Links | https://www.lens.org/lens/patent/013-675-655-355-695/frontpage |
| Language | English |
| Publisher Date | 2017-01-19 |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Patent |
| Jurisdiction | United States of America |
| Date Applied | 2016-05-05 |
| Applicant | Afton Chemical Corp |
| Application No. | 201615147375 |
| Claim | A lubricating oil composition comprising: greater than 50 wt. % of a base oil of lubricating viscosity; one or more calcium-containing overbased detergents having a total base number of greater than 225 mg KOH/g, measured by the method of ASTM D-2896, and one or more magnesium-containing detergents, and wherein the lubricating oil composition includes an amount of the overbased calcium-containing detergent that provides 900 ppm by weight to less than 2400 ppm by weight of calcium to the lubricating oil composition, and an amount of the magnesium-containing detergent that provides 50 ppm by weight to 1000 ppm by weight of magnesium to the lubricating oil composition, both amounts being based on a total weight of the lubricating oil composition based on a total weight of the lubricating oil composition; and the lubricating oil composition passes the TEOST-33 test. The lubricating oil composition of claim 1 , wherein the one or more overbased calcium-containing detergents comprise a compound selected from an overbased calcium sulfonate detergent, an overbased calcium phenate detergent, an overbased calcium salicylate detergent and mixtures thereof. The lubricating oil composition of claim 1 , wherein the reduction of LSPI events is 50% or greater reduction and the LSPI events are LSPI counts during 25,000 engine cycles, wherein the engine is operated at 2000 revolutions per minute with brake mean effective pressure of 18,000 kPa. The lubricating oil composition of claim 1 , wherein the one or more magnesium-containing detergents are overbased magnesium-containing detergents having a total base number of greater than 225 mg KOH/g, measured by the method of ASTM D-2896 and the one or more overbased magnesium-containing detergents are selected from an overbased magnesium sulfonate detergent, an overbased magnesium phenate detergent, an overbased magnesium salicylate detergent and mixtures thereof. The lubricating oil composition of claim 1 , wherein the amount of the magnesium-containing detergent is sufficient to provide from about 100 ppm by weight to about 800 ppm by weight of magnesium to the lubricating oil composition, based on the total weight of the lubricating oil composition. The lubricating oil composition of claim 1 , wherein the one or more overbased calcium-containing detergents provides from about 900 to less than about 2000 ppm by weight calcium to the lubricating oil composition based on a total weight of the lubricating oil composition. The lubricating oil composition of claim 1 , wherein the lubricating oil composition has a ratio of a total mmol metal in the lubricating oil composition to a total base number of the lubricating oil composition ranging from greater than 4.5 to about 10.0. The lubricating oil composition of claim 1 , wherein the total base number of the lubricating oil composition is at least 7.5 mg KOH/g. The lubricating oil composition of claim 1 , further comprising at least 0.2 wt. % of one or more low-based/neutral calcium-containing detergents having a total base number of up to 175 mg KOH/g, measured by the method of ASTM D-2896, based on a total weight of the lubricating oil composition. The lubricating oil composition of claim 9 , wherein the one or more low-based/neutral calcium-containing detergents comprise a compound selected from an overbased calcium sulfonate detergent, an overbased calcium phenate detergent, an overbased calcium salicylate detergent and mixtures thereof. The lubricating oil composition of claim 1 , wherein the total calcium in the lubricating oil composition ranges from about 1000 ppm to about 1800 ppm. The lubricating oil composition of claim 1 , wherein the total calcium in the lubricating oil composition ranges from about 1050 ppm to about 1650 ppm. The lubricating oil composition of claim 1 , further comprising one or more components selected from the group consisting of friction modifiers, antiwear agents, dispersants, antioxidants, and viscosity index improvers. The lubricating oil composition of claim 1 , wherein the greater than 50% of base oil is selected from the group consisting of Group II, Group III, Group IV, Group V base oils, and a combination of two or more of the foregoing, and wherein the greater than 50 wt. % of base oil is other than diluent oils that arise from provision of additive components or viscosity index improvers in the composition. The lubricating oil composition of claim 1 , wherein the lubricating oil composition is effective to reduce low speed pre-ignition events in a boosted internal combustion engine lubricated with the lubricating oil composition relative to a number of low speed pre-ignition events in the same engine lubricated with reference lubricating oil R-1. A method for reducing low speed pre-ignition events in a boosted internal combustion engine comprising: lubricating a boosted internal combustion engine with a lubricating oil composition comprising greater than 50 wt. % of a base oil of lubricating viscosity; an amount of one or more calcium-containing overbased detergents having a total base number of greater than 225 mg KOH/g, measured by the method of ASTM D-2896 sufficient to provide 900 ppm by weight to less than 2400 ppm by weight of calcium to the lubricating oil composition, based on a total weight of the lubricating oil composition, and an amount of one or more magnesium-containing detergents sufficient to provide 50 ppm by weight to 1000 ppm by weight of magnesium to the lubricating oil composition, based on a total weight of the lubricating oil composition, and operating the engine lubricated with the lubricating oil composition. The method of claim 16 , wherein the lubricant composition passes a TEOST 33 bench oxidation test and the low speed pre-ignition events in the boosted internal combustion engine lubricated with the lubricating oil composition are reduced relative to a number of low speed pre-ignition events in the same engine lubricated with reference lubricating oil R-1. The method of claim 17 , wherein LSPI events are based on LSPI counts during 25,000 engine cycles, wherein the engine is operated at 2000 revolutions per minute (RPM) with brake mean effective pressure (BMEP) of 18,000 kPa. The method of claim 16 , wherein the amount of the magnesium-containing detergent is sufficient to provide from about 100 ppm by weight to about 800 ppm by weight of magnesium to the lubricating oil composition, based on the total weight of the lubricating oil composition. The method of claim 16 , wherein the total calcium in the lubricating oil composition ranges from about 1000 ppm to about 1800 ppm. |
| CPC Classification | LUBRICATING COMPOSITIONS ;USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS |
| Extended Family | 172-201-001-743-841 035-529-241-236-55X 078-700-176-440-059 068-718-201-425-954 069-028-652-727-319 018-447-534-205-380 093-213-594-783-893 164-344-971-059-037 122-291-460-940-148 052-240-249-563-458 092-575-547-978-307 121-155-154-931-064 168-931-133-044-321 071-300-720-642-918 038-519-014-208-321 138-453-274-103-784 027-534-475-935-923 108-898-175-529-820 063-283-910-254-498 121-803-305-347-90X 171-677-079-060-810 101-543-335-877-57X 127-806-563-552-000 100-094-818-205-471 122-175-080-036-01X 083-183-772-852-867 082-535-241-089-751 011-162-813-098-633 061-105-977-755-946 169-244-155-751-811 013-675-655-355-695 073-355-942-841-243 171-107-493-128-281 018-798-302-199-414 077-454-324-376-355 085-439-557-524-835 011-893-844-777-734 190-126-022-787-080 183-228-780-215-341 139-067-344-830-196 138-011-846-625-898 033-844-004-985-87X 040-301-539-006-271 051-144-193-818-40X 121-447-267-347-790 081-278-054-371-945 030-873-287-010-290 119-514-637-702-127 065-271-754-010-866 189-802-156-654-561 067-868-035-467-979 151-418-509-106-339 144-541-021-696-689 057-604-745-734-902 178-122-189-946-191 038-928-266-459-132 016-621-408-238-34X 100-787-082-551-92X 103-705-206-584-799 098-980-228-094-413 096-163-208-366-204 111-796-451-734-099 082-790-900-935-981 086-773-737-014-816 126-201-139-945-245 140-052-725-458-256 177-546-883-066-656 072-563-742-374-10X 015-293-510-433-743 024-379-504-650-817 103-666-803-910-944 032-114-307-485-302 153-476-161-634-437 088-522-079-028-98X 036-334-962-485-771 124-769-788-337-839 139-837-126-588-512 149-689-476-465-513 042-240-221-198-863 185-908-934-324-850 178-736-588-085-225 156-824-265-621-988 007-156-938-219-624 159-213-232-907-484 080-822-371-123-11X 079-284-179-250-871 071-476-869-907-637 139-962-270-790-865 013-703-663-326-718 053-816-335-630-114 061-331-388-591-993 187-178-489-076-692 137-891-612-508-383 159-941-128-249-181 032-831-276-994-316 080-562-820-032-558 029-015-026-496-644 161-791-053-138-663 000-055-328-541-141 133-053-407-426-84X 025-138-084-592-823 042-715-283-546-313 185-210-335-356-24X 074-836-584-314-059 067-163-439-382-226 104-130-905-804-713 149-989-545-477-329 075-545-786-116-321 113-762-711-687-610 038-953-853-568-290 037-009-315-635-056 100-944-844-482-075 056-298-395-474-311 007-918-955-069-160 179-558-537-945-675 198-121-931-112-329 012-702-189-666-844 016-412-563-056-764 083-673-268-534-60X 035-171-221-788-193 118-361-455-389-01X 115-195-835-322-941 181-902-104-463-744 019-749-555-183-547 023-138-527-012-291 180-719-292-980-754 106-916-456-296-473 019-191-227-418-263 006-228-045-714-429 112-559-174-488-789 |
| Patent ID | 20170015927 |
| Inventor/Author | Fletcher Kristin Lam William Y Yang Kongsheng Styer Jeremy |
| IPC | C10M135/10 C10M129/50 |
| Status | Active |
| Owner | Afton Chemical Corporation |
| Simple Family | 190-126-022-787-080 183-228-780-215-341 079-284-179-250-871 072-563-742-374-10X 178-122-189-946-191 093-213-594-783-893 040-301-539-006-271 019-191-227-418-263 019-749-555-183-547 159-941-128-249-181 092-575-547-978-307 061-105-977-755-946 086-773-737-014-816 121-447-267-347-790 007-918-955-069-160 013-675-655-355-695 073-355-942-841-243 159-213-232-907-484 065-271-754-010-866 067-868-035-467-979 |
| CPC (with Group) | C10M159/20 C10M159/24 C10M2203/1006 C10M2203/1025 C10M2205/022 C10M2205/024 C10M2205/0285 C10M2207/028 C10M2207/262 C10M2215/28 C10M2219/046 C10M2227/066 C10M2227/09 C10N2010/12 C10N2030/00 C10N2030/08 C10N2030/10 C10N2030/40 C10N2010/04 C10N2040/25 C10N2040/255 C10M129/50 C10M135/10 C10M2219/04 C10M129/26 C10M169/04 C10M2207/141 C10M2219/044 |
| Issuing Authority | United States Patent and Trademark Office (USPTO) |
| Kind | Patent Application Publication |
