Low-emission diesel engine lubricating oil composite

Abstract

The invention discloses a composite comprising a great quantity of hydrotreating base oil, a proper quantity of alkylsalicylate, vulcanizing alkyl phenate, sulfonate, macromolecule ashless dispersant, polyisobutene bissuccinimide ashless dispersant, polyisobutene monosuccinimide ashless dispersant, boronizing polyisobutenyl bissuccinimide ashless dispersant, zinc dialkyl dithiophosphate, phenolictype antioxygen, amine type antioxygen, sulphur-containing antioxidizing anti-wear agent and ashless dithiophosphate extreme pressure antiwear additive. The lubricating oil composite of the invention is used for lubricating the heavy-load diesel engines containing reprocessing facilities, such as oxidation catalyst (DOC), particulate filters or trap (DPF), selective reduction catalyst (SCR), oxynitride trap (LNT) and the like. The invention can satisfy the specification requirements of API CI-4+ diesel engine oil, and has lower sulphur, phosphorus and sulfate ash content so as to avoid adverse impact on the reprocessing facilities.

Description

(1) Technical field [0001] The present invention relates to an engine lubricating oil composition, and in particular to a type for use with an oxidation catalyst (DOC), a particulate filter or trap (DPF), a selective reduction catalyst (SCR), and a nitrogen oxide compound trap Lubricating oil composition for low-emission, heavy-duty diesel engines in after-treatment facilities such as LNT. It belongs to the technical field of lubricants. (2) Background technology [0002] Environmental protection, energy saving, and extended oil change intervals are the main driving forces for the improvement of oil specifications. With the continuous strict foreign emission regulations, engine manufacturers adopt various new technologies, such as oxidation catalyst (DOC), particulate filter or trapping After treatment technology such as DPF, selective reduction catalyst (SCR), nitrogen oxide trap (LNT), exhaust gas recirculation (EGR), etc., to enable its engines to meet increasingly stringent ...

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Problems solved by technology

[0014] However, there is no patent disclosure about the use of hydrogenated base oil to prepare to meet the requirements of API CI-4+ diesel engine oil specifications, and at the same time limit the sulfur, phosphorus and sulfate ash content of the oil to meet the requirements of lubrication with exhaust gas after-treatment systems. oil composition

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