US 12,275,912 B2
Lubricant compositions for direct injection engine
Patrick E. Mosier, Bay Village, OH (US); Jeffry G. Dietz, Shaker Heights, OH (US); Alexander Sammut, Chardon, OH (US); Mary Galic Raguz, Mentor, OH (US); and Matthew D. Gieselman, Wickliffe, OH (US)
Assigned to The Lubrizol Corporation, Wickliffe, OH (US)
Filed by The Lubrizol Corporation, Wickliffe, OH (US)
Filed on Feb. 13, 2023, as Appl. No. 18/108,845.
Application 18/108,845 is a continuation of application No. 17/010,932, filed on Sep. 3, 2020, granted, now 11,608,478.
Application 17/010,932 is a continuation of application No. 15/560,181, granted, now 10,800,992, issued on Oct. 13, 2020, previously published as PCT/US2016/023513, filed on Mar. 22, 2016.
Claims priority of provisional application 62/137,976, filed on Mar. 25, 2015.
Prior Publication US 2023/0183597 A1, Jun. 15, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C10M 169/04 (2006.01); C10M 101/00 (2006.01); C10M 129/10 (2006.01); C10M 133/06 (2006.01); C10M 133/56 (2006.01); C10M 155/04 (2006.01); C10M 161/00 (2006.01); F02M 21/02 (2006.01); C10N 10/04 (2006.01); C10N 20/04 (2006.01); C10N 30/00 (2006.01); C10N 30/04 (2006.01); C10N 30/10 (2006.01); C10N 40/25 (2006.01); C10N 60/14 (2006.01)
CPC C10M 169/044 (2013.01) [C10M 101/00 (2013.01); C10M 129/10 (2013.01); C10M 133/06 (2013.01); C10M 133/56 (2013.01); C10M 155/04 (2013.01); C10M 161/00 (2013.01); C10M 169/041 (2013.01); F02M 21/0215 (2013.01); C10M 2203/003 (2013.01); C10M 2203/1025 (2013.01); C10M 2207/023 (2013.01); C10M 2207/026 (2013.01); C10M 2207/028 (2013.01); C10M 2215/064 (2013.01); C10M 2215/26 (2013.01); C10M 2215/28 (2013.01); C10M 2219/046 (2013.01); C10M 2219/089 (2013.01); C10M 2229/00 (2013.01); C10N 2010/04 (2013.01); C10N 2020/04 (2013.01); C10N 2030/00 (2013.01); C10N 2030/04 (2013.01); C10N 2030/10 (2013.01); C10N 2030/40 (2020.05); C10N 2030/42 (2020.05); C10N 2030/43 (2020.05); C10N 2030/45 (2020.05); C10N 2040/25 (2013.01); C10N 2040/255 (2020.05); C10N 2060/14 (2013.01); Y02T 10/30 (2013.01)] 15 Claims
 
1. A method for reducing low speed pre-ignition events in a spark-ignited direct injection internal combustion engine comprising:
operating the engine under a load with a brake mean effective pressure (BMEP) of greater than or equal to 10 bars at speeds less than or equal to 3,000 rpm; and
supplying to the engine a lubricant composition comprising:
a base oil of lubricating viscosity;
0.5 to 2.2 wt % of a boron-containing ashless dispersant;
0.1 to 3 wt % of at least one ashless antioxidant; and
0.2 to 1 wt % of a magnesium salicylate detergent.