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Low ash lubricating oil composition for gas engine

A lubricating oil composition and technology for gas engines, applied in lubricating compositions, petroleum industry, additives, etc., can solve the problems of no gas engine lubricating oil patents, etc., reduce sludge formation and paint film deposition, keep clean, reduce friction effect

Inactive Publication Date: 2009-07-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Among the Chinese patents, there is currently no patent on gas engine lubricants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Preparation of 10W / 30 gas engine lubricating oil, see Table 2 for component contents, and see Table 3 for the data thus obtained.

[0022] Table 2

[0023] components content,% Base oil components HVI100SN

MV1150BS

Pour point depressant Polymethacrylate

Viscosity Index Improver Ethylene Propylene Copolymer

Anti-foaming agent methyl silicone oil

Detergent Super Overbased Magnesium Salicylate

Detergent High base value calcium salt of salicylate

Ashless Dispersant Polyolefin Monosuccinimide 81.0

6.9

0.3

6.5

0.001

0.9

0.6

2.8

[0024] Antioxidant Alkylaniline

Antiwear agent Dialkyl dithiophosphate zinc salt 0.5

0.5

[0025] table 3

[0026] project tentative indicators measured value experiment method Sulfated ash, %

Alkaline value, mgKOH / g

Kinematic viscosity at 100℃, mm 2 / s

Dynamic viscosity at -20℃, mPa·s

B...

Embodiment 2

[0030] Example 2: Prepare 15W / 40 gas engine lubricating oil, see Table 4 for the component contents, and see Table 5 for the data thus obtained.

[0031] Table 4

[0032] components content,% base oil components

[0033] table 5

[0034] project tentative indicators measured value experiment method Sulfated ash, %

[0035] Note: See Example 1.

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PUM

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Abstract

The gas engine lubricating oil composition with low ash content of the present invention comprises base oil, pour point depressant, viscosity index improver, antifoaming agent, metal detergent composition, polyolefin succinimide type ashless dispersant, antioxidant and antioxidant Corrosion agent and anti-wear agent, the metal detergent composition is a mixture of high alkali value metal salt and medium alkali value metal salt or low alkali value metal salt. It can meet the lubrication requirements of vehicle gas engines fueled by liquefied petroleum gas (LPG) and compressed natural gas (CNG). Corrosion performance and anti-wear performance, while having low ash content (sulfated ash content 0.1%-0.6%, weight ratio), which can effectively prevent the gas engine from premature ignition.

Description

(1) Technical field [0001] The invention relates to a lubricating oil composition, especially a low ash gas engine lubricating oil composition with excellent lubricating performance, cleaning performance, dispersing performance, anti-nitrification performance, anti-oxidation and anti-corrosion performance and anti-wear performance. (2) Background technology [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 fuels is the high combustion temperature, which accelerates the NO X generation, while NO X As the blow-by gas in the engine cylinder enters the crankcase, the lubricating oil in the crankcase is 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 abi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M143/00
Inventor 李军李桂云刘岚
Owner PETROCHINA CO LTD
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