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Lubricating composition for use in diesel engines compatible with biofuel

a technology for diesel engines and lubricating compositions, which is applied in the direction of lubricant compositions, petroleum industry, additives, etc., can solve the problems of increasing the wear of engine parts, accelerating the and affecting the performance of detergents, etc., to achieve a stable use of lubricating oil over a long period, and inhibit the degradation of detergent performance and accelerated ageing of lubricating oil.

Inactive Publication Date: 2013-04-25
SHELL OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention describes a way to prevent the detergent performance of lubricating oil from declining over time, even when it is combined with biodiesel fuel. By using a combination of different types of anti-oxidant, including a phenolic and an amine-based anti-oxidant, the lubricating oil can be used for a longer period of time without losing its effectiveness.

Problems solved by technology

However, in composition they are not necessarily similar to existing fossil fuels and so various problems that can be generated by biofuels may be expected.
In the case of the alcohol fuels which are principally used in the field of gasoline engines, admixture with water cannot be avoided, and engine parts undergo a larger amount of wear than in the case of gasoline.
They have aspects which demand improvement simply in fuel terms in that their viscosities and pour points are rather high, and they are prone to oxidise because, being derived from plant oils, they contain many unsaturated fatty acids.
Furthermore, these biodiesel fuels may compete directly with edible vegetable oils, and so they have not been studied as much as the above-mentioned alcohol fuels as alternatives to gasoline, and there have hardly been any attempts to improve lubricating oils in association with biodiesel fuels.
This creates difficulties for using the lubricating oil stably over long periods.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0027]The biodiesel fuel (BDF) was a methyl ester derived from rapeseed oil and was prepared so as to have the properties shown in Table 2.

TABLE 2CharacteristicItemTest methodUnits(numeric value)Density: vibrationJIS K-2249g / cm30.883method (15° C.)Flash point: PMCC methodJIS K-2265 ° C.155Kinetic viscosity: 30° C. JIS K-2283mm2 / s5.51Cetane valueJIS K-228053.0

[0028]The following constituent materials were used in preparation of the examples of embodiment and comparative examples.[0029](1) Base oil: a mineral oil belonging to API Group III[0030](2) Phenolic anti-oxidant: 6 methylheptyl alcohol ester of 3-(4-hydroxy-3,5-di-t-butyl-phenyl)propionic acid[0031](3) Amine-based anti-oxidant: diphenylamine being a reaction product of N-phenylbenzeneamine and 2,4,4-trimethylpentene[0032](4) Additives package: additives containing dispersant, ZnDTP and detergent.

examples 1-4

, Comparative Examples 1-6

[0033]Using the above-mentioned constituent materials, the lubricating oil compositions of Examples 1-4 and Comparative Examples 1-6 were prepared in accordance with Tables 3 and 4.

[0034]The above-mentioned Comparative Example 6 was a composition with a JASO (Engine Oil Standards Implementation Panel) DH-2 level diesel combustion engine oil for use in automotive vehicles.

[0035]The amounts of each constituent blended in are shown in each case as % by mass.

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PUM

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Abstract

A method of operating a diesel engine comprises lubricating the diesel engine with a lubricating composition and using a biofuel as fuel, wherein the lubricating composition comprises a base oil belonging to Group III or Group II of the API base oil categories, from 0.5 to 5% by mass of a phenolic anti-oxidant, and from 0.5 to 5% by mass of an amine-based anti-oxidant, the total content of the anti-oxidants being at least 2% by mass.

Description

RELATED APPLICATIONS[0001]The present application is a divisional of U.S. application Ser. No. 12 / 669807, filed 20 Jan. 2010, which is a national stage entry of PCT Application EP2008 / 059543, filed 21 Jul. 2008, which claims priority to Japanese Patent Application No. 2007-190658, filed 23 Jul. 2007, all of which are hereby incorporated by reference.TECHNICAL FIELD OF THE INVENTION[0002]This invention relates to lubricating compositions for use in diesel engines that use biofuels.BACKGROUND OF THE INVENTION[0003]In recent years, as a contribution to reducing CO2 in the global environment, there has been increasing momentum towards making positive use of fuels derived from plants and produced through biomass technologies. However, in composition they are not necessarily similar to existing fossil fuels and so various problems that can be generated by biofuels may be expected. Various investigations are being made of techniques to cope with these in the lubricating oils used in intern...

Claims

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Application Information

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IPC IPC(8): C10M141/06
CPCC10M141/06C10M169/04C10N2240/103C10N2240/102C10N2230/78C10M2203/1006C10M2203/1025C10M2207/023C10M2207/026C10M2207/289C10M2215/06C10M2215/064C10M2215/065C10M2215/067C10M2215/068C10M2223/045C10N2220/10C10N2230/10C10N2220/022C10N2210/02C10N2020/081C10N2030/10C10N2030/78C10N2040/252C10N2040/253C10N2020/02C10N2010/04
Inventor SHINODA, NORIAKINAGATOMI, EIJI
Owner SHELL OIL CO