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Method for preventing or reducing low speed pre-ignition

A low-speed, engine technology, applied in the direction of additives, lubricating compositions, petroleum industry, etc., can solve the problems of cleaning technology and efficiency, improvement, etc.

Inactive Publication Date: 2016-12-14
EXXONMOBIL RESEARCHK & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solving this problem, or even mitigating its occurrence, will clear the way for original equipment manufacturers (OEMs) to improve technology and efficiency

Method used

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  • Method for preventing or reducing low speed pre-ignition
  • Method for preventing or reducing low speed pre-ignition
  • Method for preventing or reducing low speed pre-ignition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0190] Recipe such as figure 1 Prepared as described in. All ingredients used here are commercially available. Group I, II, III, IV and V base stocks were used in the formulations.

[0191]The remaining ingredients used in the formulation are viscosity index improvers, antioxidants, dispersants, antiwear agents, pour point depressants, corrosion inhibitors, metal passivators, seal compatibility additives, defoamers, inhibitors, One or more of antirust additives and friction modifiers.

[0192] right figure 1 The recipe described in was tested. result in figure 2 explained in. The sulfated ash test is determined according to ASTM D874. Kinematic viscosity at 100°C (mm 2 / s) determined according to ASTM D445. Noack (Noack) volatility is determined by ASTM D5800. Specifically, the compounds of the present disclosure are capable of functioning in an engine at a specific temperature (eg, 247-249° C., Noack conditions) without volatilization. Viscosity Index is determine...

Embodiment B

[0197] Recipe such as figure 1 Prepared as described in. All ingredients used here are commercially available. Group III, IV and V base stocks were used in the formulations.

[0198] The detergents used in the formulation were medium TBN calcium salicylate (Calcium salicylate 1) and low TBN calcium salicylate (Calcium salicylate 2).

[0199] The remaining ingredients used in the formulation are viscosity index improvers, antioxidants, dispersants, antiwear agents, pour point depressants, corrosion inhibitors, metal passivators, seal compatibility additives, defoamers, inhibitors, One or more of antirust additives and friction modifiers.

[0200] right image 3 The recipe described in was tested. result in image 3 explained in. The sulfated ash test is determined according to ASTM D874. Calcium and zinc content was determined according to ASTM D6443. The formulations were subjected to LSPI testing according to the procedure described in Example 1 using a 2.0L, 4-cylin...

Embodiment C

[0203] Recipe such as Figure 4 Prepared as described in. All ingredients used here are commercially available. Group III, IV and V base stocks were used in the formulations.

[0204] The detergents used in the formulation were medium TBN calcium alkyl salicylate (Calcium salicylate 1, which contains 7.3% Ca and has a TBN of about 200), low TBN calcium alkyl salicylate (Calcium salicylate 2, which contains 2.3% Ca and about 65 TBN), high TBN calcium alkyl sulfonate (calcium sulfonate 1, which contains 11.6% Ca and about 300 TBN), low TBN calcium alkyl sulfonate (calcium sulfonate 2, which contains 2.0% Ca and about 8 TBN), medium TBN calcium phenate calcium (calcium phenate 1, which contains 5.5% Ca and about 150 TBN), and high TBN magnesium alkylsulfonate (magnesium sulfonate 1, which contains 9.1% Mg and about 400 TBN). The TBN ranges are defined as: low TBN about 0 to 100, medium TBN about 100 to 200, and high TBN about 200 to as high as 600.

[0205] The remaining ingr...

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Abstract

A method for preventing or reducing low speed pre-ignition in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including a lubricating oil base stock as a major component, and at least one detergent, as a minor component. The detergent includes at least one alkaline earth metal salt of an organic acid, and the at least one alkaline earth metal salt of an organic acid comprises at least one magnesium salt of an organic acid. A lubricating engine oil having a composition including a lubricating oil base stock as a major component; and at least one detergent, as a minor component. The lubricating oils of this disclosure are particularly advantageous as passenger vehicle engine oil (PVEO) products.

Description

technical field [0001] The present disclosure relates to a method of preventing or reducing low speed pre-ignition (LSPI) in an engine lubricated with said lubricating oil by using as a lubricating oil a formulated oil having a detergent comprising at least one alkaline earth metal organic acid A salt, preferably a magnesium salt of at least one organic acid, is present in the formulated oil in specified amounts. The lubricating oils of the present disclosure can be used as passenger vehicle engine oil (PVEO) products. Background technique [0002] Pre-ignition in a flame-propagation (or "spark ignition") engine describes the event in which the air / fuel mixture in the cylinder ignites before the spark plug ignites. Pre-ignition is initiated by an ignition source other than the spark, such as a hot spot in the combustion chamber, a spark plug that has run too hot in its application, or carbon deposits in the combustion chamber that have been heated to glowing hot by previous...

Claims

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Application Information

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IPC IPC(8): C10M137/02C10M129/56C10M131/12C10M133/16C10M137/06C10M129/10C10M129/54C10M135/10C10M163/00C10N40/25
CPCC10M129/10C10M129/54C10M129/56C10M131/12C10M133/16C10M135/10C10M137/02C10M137/06C10M163/00C10M2223/02C10M2223/042C10M2211/044C10M2215/08C10M2219/044C10M2207/144C10M2207/023C10N2040/25C10M2201/085C10M2203/1006C10M2203/1025C10M2205/0285C10M2207/028C10M2207/122C10M2207/123C10M2207/146C10M2207/16C10M2207/262C10M2215/28C10M2217/043C10M2219/046C10M2223/045C10N2010/04C10N2030/45C10N2030/52C10N2040/255C10N2060/14C10N2020/02
Inventor 凯文·J·凯利思姆如提·A·丹斯雷蒙德·G·伯恩斯道格拉斯·E·戴克曼姆鲁盖施·N·帕特尔查尔斯·E·戈德曼
Owner EXXONMOBIL RESEARCHK & ENG CO