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Method of lubricating an internal combustion engine

Inactive Publication Date: 2016-11-10
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention aims to provide improved cleanliness, reduce soot and deposit formation, and decrease wear in internal combustion engines. This is achieved through the use of a specific lubricating composition.

Problems solved by technology

However, certain alkylphenols and products prepared from them have come under increased scrutiny due to their association as potential endocrine disruptive materials.

Method used

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  • Method of lubricating an internal combustion engine
  • Method of lubricating an internal combustion engine
  • Method of lubricating an internal combustion engine

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[0169]A series of lubricating compositions are prepared according to Table 1 below. Each composition is formulated to deliver about 1% by weight sulfated ash (ASTM D874) and to have an overall TBN of about 10 (ASTM D2896).

TABLE 1Diesel Lubricant Compositions1CEX1EX1EX210W-3010W-3015W-40Base OilBalance toBalance toBalance to100%100%100%Succinimide dispersant22.02.02.0Borated succinimide dispersant30.330.340.34Aryl amine succinimide0.850.850.85dispersant4Overbased calcium sulphonate00.580.58(metal ratio ~10 TBN = 515)“Neutral” calcium sulphonate00.380.38(metal ratio ~1.2)Overbased calcium sulphonate0.5300(metal ratio ~3 TBN = 160)Overbased magnesium0.440.510.51sulphonateOverbased Calcium sulfur-0.4300coupled phenate“Neutral” Calcium sulfur-coupled0.2500phenateMagnesium alkylene coupled0.3700phenol detergentAromatic amine dispersant0.330.330.33viscosity modifier booster5Secondary ZDDP (C3-6)1.01.01.0Ashless Antioxidants61.41.61.6Other Additives70.180.560.56OCP Viscosity Index Improver—...

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Abstract

The invention provides a method of lubricating a compression-ignition internal combustion engine with a maximum laden mass over 2,700 kg comprising supplying to the engine a lubricating composition comprising: an oil of lubricating viscosity, a 300 TBN or higher alkaline earth metal sulphonate detergent having a metal ratio of 10 to 40, 0.1 wt % to 4 wt % of a borated polyisobutylene succinimide dispersant, wherein the polyisobutylene from which the borated polyisobutylene succinimide is derived has a number average molecular weight of 550 to 1150, and 0.1 wt % to 6 wt % of a polyisobutylene succinimide, wherein the polyisobutylene from which polyisobutylene succinimide is derived has a number average molecular weight of 1550 to 2500, 0 wt % to 0.2 wt % of a phenolic based detergent, wherein the total amount of soap delivered by the alkaline earth metal sulphonate (typically calcium sulphonate) is 0.4 to 1 wt % of the lubricating composition, and wherein the lubricating composition has a sulphated ash content of not more than 1.5 wt %.

Description

FIELD OF INVENTION[0001]The invention provides a method of lubricating a compression-ignition internal combustion engine with a maximum laden mass over 2,700 kg comprising supplying to the engine a lubricating composition comprising: an oil of lubricating viscosity, a 300 TBN or higher alkaline earth metal sulphonate detergent having a metal ratio of 10 to 40, 0.1 wt % to 4 wt % of a borated polyisobutylene succinimide dispersant, wherein the polyisobutylene from which the borated polyisobutylene succinimide is derived has a number average molecular weight of 550 to 1150, and 0.1 wt % to 6 wt % of a polyisobutylene succinimide, wherein the polyisobutylene from which polyisobutylene succinimide is derived has a number average molecular weight of 1550 to 2500, 0 wt % to 0.2 wt % of a phenolic based detergent, the total amount of soap delivered by the alkaline earth metal sulphonate (typically calcium sulphonate) is 0.4 to 1 wt % of the lubricating composition, and the lubricating comp...

Claims

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Application Information

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IPC IPC(8): C10M161/00
CPCC10M161/00C10M2217/06C10M2219/044C10M2219/046C10M2207/027C10M2223/045C10N2220/021C10N2230/04C10N2230/10C10N2230/06C10N2230/52C10N2230/45C10N2240/102C10M163/00C10M167/00C10M2205/022C10M2207/026C10M2207/028C10M2207/262C10M2215/064C10M2215/086C10M2219/082C10M2219/084C10M2205/02C10M2215/28C10M2219/088C10M2219/089C10N2020/04C10N2030/04C10N2010/04C10N2030/06C10N2030/43C10N2030/42C10N2030/45C10N2030/52C10N2040/252C10N2060/14C10M2205/024C10N2030/10
Inventor GALIC RAGUZ, MARYLOOP, JOHN G.
Owner THE LUBRIZOL CORP
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