Lubricant Compositions Containing Phosphorus For Use In Hydrogen Fueled Engines

Abstract

This invention relates to a method of reducing abnormal combustion events in a hydrogen fueled internal combustion engine during operation of the engine including: (i) providing a lubricating oil composition to the hydrogen fueled internal combustion engine; (ii) providing fuel comprising hydrogen to the internal combustion engine; and (iii) combusting the fuel in the hydrogen fueled internal combustion engine; wherein the lubricating oil composition: 1) includes one or more zinc dihydrocarbyl dithiophosphate compounds that provide more than 0.01 mass % zinc, and less than 0.08 mass % of phosphorus, or alternatively greater than or equal to 0.10 mass % and less than 0.40 mass % of phosphorus, based upon the weight lubricating oil composition, and 2) exhibits reduced pre-ignition at a given engine speed (rpm) whilst operating at maximum BMEP for that given engine speed (rpm), as compared to the same composition except that the concentration of the zinc dihydrocarbyl diphosphate compounds is such that the mass % phosphorus present in the lubricating oil composition is not within the specified ranges.

Dependencies are inferred from the claim text.