US 11,753,599 B2
Lubricating compositions for a hybrid engine
Huifang Shao, Moseley, VA (US); Mark Devlin, Glen Allen, VA (US); Paul Ransom, Huddersfield (GB); and Guillaume Carpentier, Bracknell (GB)
Assigned to AFTON CHEMICAL CORPORATION, Richmond, VA (US)
Filed by AFTON CHEMICAL CORPORATION, Richmond, VA (US)
Filed on May 6, 2022, as Appl. No. 17/662,420.
Claims priority of provisional application 63/197,171, filed on Jun. 4, 2021.
Prior Publication US 2022/0389345 A1, Dec. 8, 2022
Int. Cl. C10M 137/10 (2006.01); C10M 125/10 (2006.01); C10M 133/16 (2006.01); C10M 169/04 (2006.01); C10N 10/04 (2006.01); C10N 20/02 (2006.01); C10N 30/04 (2006.01); C10N 30/06 (2006.01); C10N 40/25 (2006.01)
CPC C10M 137/10 (2013.01) [C10M 125/10 (2013.01); C10M 133/16 (2013.01); C10M 169/04 (2013.01); C10M 2201/062 (2013.01); C10M 2215/086 (2013.01); C10M 2223/045 (2013.01); C10N 2010/04 (2013.01); C10N 2020/02 (2013.01); C10N 2030/04 (2013.01); C10N 2030/06 (2013.01); C10N 2040/25 (2013.01)] 11 Claims
 
1. A method for reducing wear in an internal combustion engine of a hybrid vehicle comprising lubricating the internal combustion engine of the hybrid vehicle with a lubricating oil composition comprising:
greater than 50 wt. % of a base oil of lubricating viscosity; and
an amount of one or more zinc dialkyl dithiophosphate compound(s) sufficient to provide:
from 550 ppmw phosphorus to 710 ppmw phosphorus, based on a total weight of the lubricating oil composition, and
from 200 ppmw zinc to 821 ppmw zinc, based on the total weight of the lubricating oil composition; and
wherein the one or more zinc dialkyl dithiophosphate compounds are derived from 100 mole % of one or more primary alkyl alcohol(s),
the one or more zinc dialkyl dithiophosphate compound(s) has a zinc to phosphorus molar ratio of at least 1.20,
the lubricating oil composition further comprises one or more components selected from the group consisting of succinimide dispersant(s), borated succinimide dispersant(s), organic friction modifier(s), molybdenum-containing compound(s), calcium sulfonate detergent(s), antioxidant(s), antifoam agent(s), pour point depressant(s), and viscosity index improver(s), and
the internal combustion engine of the hybrid vehicle is operated at a temperature of 100° C. or less.