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Lubricating oil composition for diesel engine

A technology of lubricating oil composition and diesel engine, which is applied in the direction of lubricating composition, petroleum industry, thickener, etc. It can solve the problems that CD-grade oil cannot meet the lubrication requirements of new models, and the price is high, so as to achieve high cost performance and prolong service life , The effect of simple production process

Active Publication Date: 2009-09-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the oil used in diesel engines in my country is still dominated by CD-grade diesel engine oil. However, with the development of diesel engines towards direct injection and high power, the severity of engines increases. Higher requirements are put forward for abrasiveness, and CD grade oil can no longer meet the lubrication requirements of new models
Many new domestic diesel engines and heavy-duty vehicles imported from abroad require the use of CF-4 grade diesel engine oil. The demand for CF-4 grade oil is constantly increasing, but most of the CF-4 oil in the domestic market is imported from abroad. higher price

Method used

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  • Lubricating oil composition for diesel engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare full formula 15W / 40CF-4 oil, base oil with HVI150, HVI400, additives include high-alkali calcium sulfurized alkyl phenate, low-alkali calcium sulfonate, bis-succinimide, zinc dialkyl dithiophosphate, di Alkyl diphenylamine, the specific components and contents are shown in the table

[0020] components Content (weight ratio) High base sulfurized calcium alkylphenate 2.0 Calcium low alkali sulfonate 2.0 Disuccinimide 4.5 Zinc Dialkyl Dithiophosphate 0.5 Dialkyldiphenylamine 1.0 Ethylene Propylene Copolymer 12 pour point depressant 0.8 Antifoaming agent 0.003 base oil 77.197

[0021] Performance evaluation of the formulated lubricating oil yielded the following results:

[0022] Painted panels test, rating

Embodiment 2

[0024] Prepare full formula 15W / 40CF-4 oil,

[0025] components Content (weight ratio) High base sulfurized calcium alkylphenate 3.5 Calcium low alkali sulfonate 3.0 Disuccinimide 2.0 Zinc Dialkyl Dithiophosphate 1.5 Dialkyldiphenylamine 0.2 Ethylene Propylene Copolymer 9 pour point depressant 0.6 Antifoaming agent 0.002 base oil 80.198

[0026] Performance evaluation of the formulated lubricating oil yielded the following results:

[0027] Painted panels test, rating

Embodiment 3

[0029] Preparation of full formula 30CF-4 oil

[0030] components Content (weight ratio) High base sulfurized calcium alkylphenate 2.5 Calcium low alkali sulfonate 2.5 Disuccinimide 3.0 Zinc Dialkyl Dithiophosphate 0.9 Dialkyldiphenylamine 0.8 Ethylene Propylene Copolymer 4 pour point depressant 0.3 Antifoaming agent 0.001 base oil 85.999

[0031] Performance evaluation of the formulated lubricating oil yielded the following results:

[0032] Painted panels test, rating

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Abstract

The invention relates to a lubricating oil composition for a diesel engine. The contents of the components of the lubricating oil composition by weight percentage are as follows: 3.5 percent to 6.5 percent of high temperature clearing agent, 2 percent to 4.5 percent of ashless dispersant, 0.7 percent to 2.5 percent of compound antioxidant, 0 percent to 12 percent of viscosifier, 0.3 percent to 0.8 percent of pour point depressant, 0.001 percent to 0.005 percent of defoaming agent and the balance of base oil. The total weight of the high temperature clearing agent, the ashless dispersant and the compound antioxidant take up no more than 10.5 percent of the lubricating oil for the diesel engine. The composition has the advantages of easily obtained materials, simple production process and low cost, and can meet the quality requirements of APICF-4 grade, avoid fault caused by poor lubrication of the diesel engine and prolong the service life of the engine.

Description

technical field [0001] The invention relates to a diesel engine lubricating oil composition for a direct-injection high-load diesel engine crankcase. Background technique [0002] At present, the oil used in diesel engines in my country is still dominated by CD-grade diesel engine oil. However, with the development of diesel engines towards direct injection and high-power, the severity of engines increases. Higher requirements have been put forward for wear and tear, and CD-grade oil can no longer meet the lubrication requirements of new models. Many new domestic diesel engines and heavy-duty vehicles imported from abroad require the use of CF-4 grade diesel engine oil. The demand for CF-4 grade oil is constantly increasing, but most of the CF-4 oil in the domestic market is imported from abroad. The price is higher. Contents of the invention [0003] The purpose of the present invention is to provide a lubricating oil composition for diesel engines that meets API CF-4 sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C10M135/10C10M133/16C10M119/06C10M137/10C10M143/00C10M155/02C10N30/10C10N30/04C10N30/02C10N30/18C10N40/25
Inventor 张长和佘海波
Owner PETROCHINA CO LTD