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Use of detergent additives in high-ethanol fuels for deposit control

a technology of detergent additives and high-ethanol fuel, which is applied in the direction of fuel additives, liquid carbonaceous fuels, petroleum industry, etc., can solve the problems of harmful and undesirable deposits on the fuel intake valves of the engine, and unacceptable combustion chamber deposits

Inactive Publication Date: 2005-02-17
AFTON CHEMICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a method for reducing engine deposits in internal combustion engines. The invention involves combusting a fuel containing a high concentration of ethanol and a detergent-containing fuel additive. The detergent additive helps to reduce the formation of intake valve deposits while also reducing the amount of combustion chamber deposits. The combination of ethanol and the detergent additive works synergistically to achieve this reduction in deposits. The invention is particularly useful for gasoline / ethanol fuel mixtures and can be used in direct-injection gasoline engines.

Problems solved by technology

However, the use of ethanol in a gasoline combusted in an internal combustion engine is well known to create harmful and undesirable deposits on the fuel intake valves of the engine.
Additives used in gasoline / ethanol fuel mixtures in internal combustion engines can reduce the formation of these intake valve deposits (IVD), but such remediation typically shifts the problem to the combustion chamber, where unacceptable combustion chamber deposits (CCD) are then formed.

Method used

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  • Use of detergent additives in high-ethanol fuels for deposit control
  • Use of detergent additives in high-ethanol fuels for deposit control
  • Use of detergent additives in high-ethanol fuels for deposit control

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Embodiment Construction

[0005] The present invention is directed to the reduction of engine deposits formed as a result of the combustion of fuels in the engine. Engine deposits include intake valve deposits (IVD) and combustion chamber deposits (CCD). Historically, a reduction of IVD meant an increase in CCD. The present invention includes a method for reducing all engine deposits (especially IVD) by combusting a fuel having a high concentration of an oxygenate and a detergent-containing fuel additive. In one embodiment, the oxygenate in the fuel is ethanol, and the detergent is Mannich-based. It has also been discovered that increasing the amount of oxygenate increases the conductivity of the fuel. It is postulated, without limitation to this theory, that the increase in conductivity, in combination with the addition of a detergent, more effectively reduces engine deposits. Good results are obtained in one embodiment when the conductivity of the fuel is in excess of about 1×103 nS / m.

[0006] By “fuel” or ...

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Abstract

The present invention relates to a method for controlling deposit formation on intake valves while simultaneously exhibiting “no-harm” on combustion chamber deposits in engines by combusting in the engine a fuel composition containing an ethanol content greater than about 5% by volume and a Mannich-base detergent additive. The invention also relates to a high ethanol-content gasoline fuel containing a Mannich-base detergent in an amount effective for improving the reduction of intake valve deposits resulting from the combustion in an engine of the fuel.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method for controlling deposit formation on intake valves and combustion chambers in engines by combusting in the engine a fuel composition having a high ethanol content and a detergent additive. The invention also relates to a high ethanol content fuel containing a detergent in an amount effective for improving the reduction in valve deposits resulting from the combustion of the fuel. BACKGROUND OF THE INVENTION [0002] Additives for gasoline used in vehicles have been used for many years to improve the performance of the vehicle, reduce the emissions from the combustion of the fuel, and modify the physical and chemical properties of the fuel. One additive that has been used for many years is ethanol, or ethyl alcohol, and other oxygenates. However, the use of ethanol in a gasoline combusted in an internal combustion engine is well known to create harmful and undesirable deposits on the fuel intake valves of the engine...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10L1/18C10L1/22C10L10/00
CPCC10L1/1824C10L10/00C10L1/221C10L10/04
Inventor ARADI, ALLEN A.COLUCCI, WILLIAM J.COPLEY, KELLYZAHALKA, THOMAS L.
Owner AFTON CHEMICAL
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