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Use of a viscosity improver

A technology for viscosity improvement and application, which is applied in the application field of viscosity improvers, and can solve problems affecting fuel viscosity and engine performance, etc.

Active Publication Date: 2014-11-26
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, the geometry of the injection system itself may affect the way the viscosity and other properties of the fuel affect engine performance

Method used

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Examples

Experimental program
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Embodiment 1

[0074] According to the present invention, diesel fuel formulations were prepared by blending a diesel base fuel with four viscosity improving test additives. The additives are:

[0075] a.SV TM 150, Fuel additive comprising polystyrene-polyisoprene block copolymer, available from Infineum.

[0076] b.SV TM 200, a fuel additive comprising a polystyrene-polyisoprene star copolymer, available from Infineum.

[0077] c.SV TM 260, a fuel additive comprising a styrene-polyisoprene star copolymer, available from Infineum.

[0078] d. HNR40D, lube base oil, ex Shell.

[0079] The base fuel was zero sulfur diesel fuel (obtained from Shell) which complied with the European Union's diesel fuel specification EN590. It contains 7% v / v rapeseed methyl ester (RME) along with standard refinery additives. Its kinematic viscosity (DIN EN ISO3104) at 40°C is 2.86mm 2 / s, and the density at 40°C (DIN EN ISO12185) is 817.28kg / m 3 .

[0080] HNR40D is a highly refined API Group V mineral...

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Abstract

Use of a viscosity-improving additive, in a diesel fuel formulation, for the purpose of increasing the compressibility of the formulation. The viscosity-improving additive may be selected from (i) olefin-based polymers (in particular styrene-based polymers); (ii) base oils naphthenic, paraffinic or synthetic; (iii) polymethacrylates; and (iv) mixtures thereof. It may be used to increase the isothermal compressibility of the diesel fuel formulation at typical fuel injection pressures and temperatures, and in turn to improve the power- related performance of a compression ignition engine running on the fuel formulation.

Description

technical field [0001] The present invention relates to the use of certain types of additives for new purposes in diesel fuel formulations. Background technique [0002] It is often desirable to improve the performance of internal combustion engines through the use of modified fuels. In the past, for example, diesel fuels have been modified by the addition of relatively high density components in order to improve the power-related performance of engines operating on said fuels. In modern direct injection diesel engines, higher density fuels generally increase the amount of combustible material delivered to the combustion chamber through the engine's fixed volume fuel nozzles, which in turn increases the energy available through the combustion process. [0003] The behavior of fuel in an engine injection system cannot be directly predicted, especially at the extremely high injection pressures (typically in excess of 2000 bar) experienced in modern diesel engines. Diesel fue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/10C10L10/00C10L1/16
CPCC10L1/10C10L1/165C10L1/1641C10L10/00C10L1/1616C10L2200/0446C10L1/14C10L1/1658C10L1/1963
Inventor F·J·巴尔舍萨M·埃更斯泰因
Owner SHELL INT RES MAATSCHAPPIJ BV