Lubricant for dual-fuel engine

Abstract

The invention discloses a lubricant for a dual-fuel engine. The lubricant for the dual-fuel engine is characterized by comprising the following substances in parts by weight: 50-63 parts of base oil, 1.5-3.8 parts of nonylphenol polyoxyethylene ether, 1-7 parts of polyvinyl ether, 11-18 parts of poly-alpha-olefin, 1-3 parts of 1-hydroxy-2-acetyl-4-methyl benzene, 3-5 parts of p-methoxy styrene, 0.5-3.1 parts of phenyl-naphthylamine, 5-9 parts of resorcinol, 0.5-1 part of carboxylic acid and carboxylate, 1-8 parts of acrylate and 65-84 parts of base plant oil. The lubricant for the dual-fuel engine has excellent antioxidant capacity, high-base value acidification resistance and wear resistance; the evaporation loss of the lubricant is effectively reduced; engine wear caused by the existing lubricant is improved; the lubricant for the dual-fuel engine is good in detergency, high in fuel combustion value and complete in combustion, reduces formation of oil sludge and carbon deposit in an engine, and reduces emissions of CO, hydrocarbons, NOx, sulfides and lead.

Description

technical field [0001] The invention relates to a dual-fuel engine lubricating oil. Background technique [0002] With the gradual enhancement of people's awareness of energy conservation, countries all over the world pay more attention to the issue of resource utilization. At present, in the automobile industry, alternative fuel vehicles are being continuously developed, among which the ideal is a dual-fuel vehicle that replaces internal combustion engine oil with fuel such as compressed natural gas or liquefied petroleum gas. [0003] The dual-fuel engine uses natural gas or liquefied petroleum gas as fuel, which has a high calorific value, and the exhaust temperature is as high as 480 ° C, which is 180 ° C to 200 ° C higher than the temperature of ordinary internal combustion engine oil. The high combustion temperature of the engine leads to the evaporation loss of lubricating oil If the NOx content is too high, the internal combustion engine oil can easily oxidize or ni...

AI Technical Summary

Problems solved by technology

[0003] The dual-fuel engine uses natural gas or liquefied petroleum gas as fuel, which has a high calorific value, and the exhaust temperature is as high as 480 ° C, which is 180 ° C to 200 ° C higher than the temperature of ordinary internal combustion engine oil. The high combustion temperature of the engine leads to the evaporation loss of lubricating oil If the NOx content is too high, the internal combustion engine oil can easily oxidize or nitrate NOx, increase sludge and carbon deposits, thereby accelerating engine wear and lubricating oil deterioration and aging; moreover, compressed natural gas or liquefied petroleum gas itself has no lubricating effect, so , it is required that the ash content of the internal combustion engine oil should be moderate, so that the ash deposited on the valve and the valve seat can act as a lubricant. If the ash content is too low, it will not have the lubrication effect, which will easily lead to wear of the intake valve, exhaust valve and valve seat. If the ash content is too high , will cause early ignition of the engine and spark plug pollution, affect engine power, generate hard deposits on the surface of the engine, excessive carbon deposits, and valve melting