A method for reducing particulate emissions

a technology of spark ignition engine and particulate emissions, which is applied in the direction of fuel additives, liquid carbonaceous fuels, fuel additives, etc., can solve the problems that the hydrocarbon fuel developed for spark ignition combustion engines may not be optimised or beneficial for direct injection spark ignition engines, and achieve the effects of reducing particulate emissions, reducing particulate emissions, and reducing particulate emissions

Pending Publication Date: 2020-10-29
SHELL OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]According to the present invention there is provided a method for reducing particulate emissions from a direct injection spark-ignition engine, wherein the method comprises fuelling the engine with a gasoline composition, wherein the gasoline composition comprises a hydrocarbon base fuel comprising not greater than 5% v aromatics of at least 9 carbon atoms, based on the base fuel, a T90 of up to 150° C. and a final boiling point not greater than 190° C.
[0006]According to the present invention there is further provided a use of a gasoline composition for reducing particulate emissions from a direct injection spark-ignition engine, wherein the gasoline composition comprises a hydrocarbon base fuel comprising not greater than 5% v aromatics of at least 9 carbon atoms, based on the base fuel, a T90 of less than 150° C. and a final boiling point not greater than 190° C.
[0007]It has surprisingly been found that by selecting a gasoline composition meeting certain parameters the particulate emissions from a direct injection spark-igntion engine are reduced.

Problems solved by technology

Current hydrocarbon fuels developed for spark-ignition combustion engines may not be optimised or indeed beneficial for direct injection spark-igntion engines, particularly when it comes to levels of particulate emissions.
However, there is no mention in this document of the use of such a fuel for providing reduced particulate emissions in a direct-injection spark ignition engine.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0031]The fuel compositions of Examples 1-4 are shown in Table 2 below. Each of these are prepared from the gasoline base fuel having the properties set out in Table 1 below, and for each example the v % of heavy aromatics (aromatics having at least 10 carbon atoms) is adjusted such that it contains an amount of heavy aromatics (C9+) as specified in Table 2 below. Thus, Example 1 contains 0% v heavy aromatics, Example 2 contains 4% v heavy aromatics, Example 3 contains 8% v heavy aromatics and Example 4 contains 12% v heavy aromatics.

TABLE 1(Properties of Base Fuel)IBP (° C.)31.9T10 (° C.)47.3T50 (° C.)102.0T90 (° C.)142.7FBP (° C.)179.3RVP (kPa)65.1RON95.3MON82.9Aki ((RON + MON) / 2)89.1Sensitivity (RON − MON)12.43Paraffins (% v)49.7Olefins (% v)14.3Aromatics (% v)32.7PM index0.81C9 aromatics (% v)2.65C10 aromatics (% v)0.26C11 aromatics (% v)0.00C12 aromatics (% v)0

[0032]The fuel compositions in Table 2 are subjected to the particulate matter emissions test described in SAE Paper 20...

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Abstract

A method for reducing particulate emissions from a direct injection spark-ignition engine, wherein the method comprises fuelling the engine with a gasoline composition, wherein the gasoline composition comprises a hydrocarbon base fuel comprising not greater than 5% v aromatics of at least 9 carbon atoms, based on the base fuel, a T90 of up to 150° C. and a final boiling point not greater than 190° C.

Description

FIELD OF THE INVENTION[0001]This invention relates to a method for reducing particulate emissions from a direct injection spark-ignition engine.BACKGROUND OF THE INVENTION[0002]There is increasing concern about the environmental effects of particulate emissions from spark-ignition combustion engines, particularly from direct injection spark-ignition engines. This has resulted in a growing demand for motor vehicles that operate with reduced particulate emissions.[0003]Current hydrocarbon fuels developed for spark-ignition combustion engines may not be optimised or indeed beneficial for direct injection spark-igntion engines, particularly when it comes to levels of particulate emissions. It would therefore be desirable to find ways of reducing the particulate emissions from the operation of a direct-injection spark ignition engine.[0004]WO2004 / 113476 discloses gasoline compositions meeting certain parameters whose use as a fuel in a spark ignition engine results in improved stability ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10L1/06C10L1/02C10L10/02
CPCC10L1/023C10L1/06C10L2200/0423C10L10/02C10L2270/023
Inventor CRACKNELL, ROGER FRANCISARADI, ALLEN AMBWEREPELLICCIARI, VALERIO
Owner SHELL OIL CO
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