Lubricating oil composition for turbocharging direct injection engine

Abstract

The invention discloses a lubricating oil composition for a turbocharging direct injection engine. The composition is prepared from, by weight, 75-85% of base oil, 7-12% of engine oil complexing agent, 4-12% of viscosity index improver, 0.3-1.0% of friction improver, 0.3-1.0% of high-temperature ashless antioxidant, 0.3-2% of rubber seal improver and 0.1-0.5% of pour point reducer. According to the lubricating oil composition, the content of calcium, phosphorus and molybdenum in finished lubricating oil is reasonably controlled, so that the obtained product has excellent high-temperature oxidation resistance and piston cleanliness, high grease controllability and remarkable anti-wear protective property; the occurrence rate of low-speed preignition of the turbocharging direct injection engine can be effectively reduced, the fuel economy of vehicles can be improved, and the service life of the engine can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of lubricating oil for engines, in particular to a lubricating oil composition for a turbocharged direct injection engine. Background technique [0002] In recent years, turbocharging and in-cylinder direct injection technology have become an important development trend of ignition gasoline engines. Turbocharging has obvious advantages in increasing engine power density and torque output, thus improving engine power without increasing displacement; in-cylinder direct injection technology can effectively improve combustion efficiency, improve fuel economy and emissions, and Improve engine transient response. As emissions and fuel efficiency regulations from governments around the world become more stringent, OEMs are using turbocharged, gasoline direct injection (TGDI) engine technology. Turbocharged gasoline direct injection currently accounts for 15-20% of new engine production and will double its market ...

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Problems solved by technology

According to the applicant's understanding, there are few relevant reports on lubricating oil for turbocharged direct injection engines in China, and they have not been taken seriously. CN10410957A introduces a special lubricating oil formula for turbocharged engines and its production process. This patent mainly uses Synthetic base oils and high-performance engine compounding agents to improve the high temperature oxidation resistance, anti-wear and detergency of the oil, and solve the problem of carbon deposition in turbocharged engines, but they cannot help improve the low-speed pre-ignition problem of turbocharged direct injection engines And the oil leakage problem caused by the aging of the seals of the engine under long-term high-temperature conditions

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