Lubricant for diesel engine

Abstract

The invention relates to a lubricant for a diesel engine. The lubricant is prepared from the following raw materials in parts by weight: 60-80 parts of base oil, 3-5 parts of a sulfonate detergent, 5-7 parts of a dispersant, 4-10 parts of an anti-oxidant, 1-5 parts of an anti-foaming agent, 2-12 parts of oil-soluble polyether, 2-6 parts of tricresyl phosphate and 0.2-0.8 part of a friction modifier. The lubricant for the diesel engine has the following advantages: as the oil-soluble polyether (OSP) is added into the lubricant for the diesel engine and fixed and dissolved with the refined baseoil, the oxidation resistance of the lubricant is greatly improved; besides, all ingredients have favorable compatibility; and the lubricant for the diesel engine is good in detergency and dispersibility, oxygen corrosion resistance and shearing stability and has appropriate viscosity in a low-temperature, high-temperature or high-shearing environment of the engine.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to a lubricating oil for diesel engines. Background technique [0002] Diesel engines are used as engines for commercial vehicles and construction machinery vehicles. In recent years, diesel engines have been continuously updated. At present, direct injection technology and turbocharging technology are widely used in diesel engines to increase power. Delayed injection technology, exhaust gas recirculation technology, piston optimization, etc. are used to reduce engine emissions. The application of these technologies puts forward higher requirements for the cleanliness, dispersion, anti-oxidation and anti-wear of diesel engine oils used in diesel engines. [0003] As we all know, the internal temperature of the engine is very high, and the lubricating oil will inevitably oxidize during use. In engines, the oxidation process creates acids, sludge and deposits. Acid causes co...