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Improvements relating to fuel economy

A fuel economy and fuel technology, applied in the direction of fuel, liquid carbon-containing fuel, petroleum industry, etc., can solve the problems of effective amount reduction, difficulty in achieving the optimal balance between fuel economy and exhaust emissions, and reduction of combustible fuel

Active Publication Date: 2013-09-18
SHELL INT RES MAATSCHAPPIJ BV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Furthermore, since the amount of fuel injected into a motor vehicle's engine is primarily governed by volume, a reduction in fuel density results in a reduction in the amount of combustible fuel in the engine cylinders and a consequent reduction in the effective amount of energy that can be converted
This drives engine emissions further in the direction of low NOx and high PM, but at the expense of engine efficiency and increased fuel consumption
Even though this may have a small benefit in NOx emissions, it has been realized that this setup does not provide the optimum balance between fuel economy and exhaust emissions that motor vehicle manufacturers want
[0010] Given the above operating procedures and issues, it is difficult to achieve an optimal balance between fuel economy and exhaust emissions using only standard refinery fuels

Method used

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  • Improvements relating to fuel economy
  • Improvements relating to fuel economy
  • Improvements relating to fuel economy

Examples

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Embodiment

[0109] introduction

[0110] In these examples, the results of a bench engine testing program used to evaluate the effect of fuel viscosity on diesel fuel economy are reported. A standard diesel was compared to the same diesel fuel containing different concentrations of viscosity enhancing components. A VI improver, specifically ShellVis 200 ("SV200") was used as the viscosity enhancing component.

[0111] 1, Test platform and test cycle

[0112] To assess the potential impact of fuel viscosity on diesel fuel economy, a Mercedes Benz 2.21 diesel test bench engine (OM646.963L - "OM646 engine") was used for the study. The OM646 engine is a common rail diesel engine installed on the PAE test bench 007. The relevant technical information / data of the OM646 test engine used is shown in Table 1.

[0113] Table 1

[0114] motor vehicle

C220CDI, E220, construction period CDI2004-2007

cylinder

4DOHC

Displacement

2148cm 3

the power

...

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Abstract

The use of a viscosity increasing component in a diesel fuel composition is described for the purpose of improving the fuel economy of an engine or of a vehicle powered by such an engine. The viscosity increasing component is a viscosity index (VI) improving additive, such as a polystyrene-polyisoprene stellate copolymer. The diesel fuel may comprise a biofuel. Methods of using a viscosity increasing component for purposes of improving fuel economy, and methods of operating a compression ignition engine are also described,

Description

technical field [0001] The present invention relates to methods of improving diesel fuel economy in compression ignition (diesel) engines; and in particular the use of viscosity enhancing components in diesel fuel compositions to improve fuel economy. Background technique [0002] Currently, emission regulations such as those in the United States and Europe set strict limits on acceptable levels of polluting gases that are tolerated in the exhaust emissions of compression ignition engines. [0003] A common approach taken by engine and fuel manufacturers to improve the combustion process and reduce the generation of unwanted exhaust emissions is to utilize some form of "advanced combustion". Advanced combustion is a catch-all term that includes many different fuel modes, and it typically includes one or more of the following features: fuel injection well ahead of top dead center (TDC); multiple fuel injections; extensive exhaust gas recirculation (EGR) ; and high injection ...

Claims

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Application Information

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IPC IPC(8): C10L1/195
CPCC10L1/1633C10L1/1641C10L1/165C10L1/1658C10L1/1802C10L1/19
Inventor A·H·布伦纳J·J·J·路易斯A·舍费尔R·G·威廉姆斯
Owner SHELL INT RES MAATSCHAPPIJ BV
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