Gas engine lubricating oil composition and preparation method thereof

Abstract

The invention discloses a gas engine lubricating oil composition and a preparation method thereof, the gas engine lubricating oil composition is prepared from mineral base oil, an anti-oxidation and anti-corrosion additive, a pour point depressant, a rust and corrosion resistant agent, an ashless friction modifier, an anti-wear agent, an extreme pressure agent, an anti-foaming agent, an antioxidant, a clearing dispersing agent and a demulsifier as raw materials by strictly controlling the proportion of each component, a traditional lubricating oil formula is changed, the pour point depressantis a chemically-synthesized polymer or condensate, the molecule of the pour point depressant generally contains a polar group (or an aromatic nucleus) and an alkyl chain similar to a paraffinic hydrocarbon in structure, the pour point depressant is a common chemical compound, is simple in preparation process and low in production cost, the anti-wear agent is added to facilitate formation of a filmon a friction surface under light load and medium load conditions from the gas engine lubricating oil composition to prevent wear and tear, the antioxidant is added to inhibit formation of a high temperature sediment and reduce generation of carbon deposit in a cylinder so as to avoiding plugging of a spark plug, and the gas engine lubricating oil composition can be used in lubrication of gas engines.

Description

technical field [0001] The invention relates to the technical field of engine lubricating oil treatment, in particular to a gas engine lubricating oil composition and a preparation method thereof. Background technique [0002] In recent years, with the attention to environmental protection, gas engine vehicles fueled by liquefied petroleum gas LPG and compressed natural gas CNG have developed rapidly. A notable feature of gaseous fuel is high combustion temperature, which accelerates the formation of NOx, and NOx enters the crankcase with the blow-by gas in the engine cylinder, making the lubricating oil in the crankcase more likely to be nitrated, thereby shortening the service life of the lubricating oil. In addition, lubricating oil is easy to form deposits in gaseous fuel engines, but gaseous fuels have insufficient cleaning ability for engine deposits. When the ash content of lubricating oil is too high, the tendency to form deposits is more obvious. A large amount of d...

AI Technical Summary

Problems solved by technology

A notable feature of gaseous fuel is that the combustion temperature is high, which accelerates the formation of NOx, and NOx enters the crankcase with the blow-by gas in the engine cylinder, making the lubricating oil in the crankcase more likely to be nitrated, thereby shortening the service life of the lubricating oil

In addition, lubricating oil is easy to form deposits in gaseous fuel engines, but gaseous fuels have insufficient cleaning ability for engine deposits. When the ash content of lubricating oil is too high, the tendency to form deposits is more obvious. A large amount of deposits can cause Pre-ignition of the gas engine, causing the engine to work disorderly