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EVS-EN ISO 5164:2014

Petroleum products - Determination of knock characteristics of motor fuels - Research method (ISO 5164:2014)

General information
Valid from 01.07.2014
Base Documents
ISO 5164:2014; EN ISO 5164:2014
Directives or regulations
None
Standard history
Status
Date
Type
Name
01.07.2014
Main
04.01.2006
Main
This International Standard establishes the rating of liquid spark-ignition engine fuel in terms of an arbitrary scale of octane numbers using a standard single-cylinder, four-stroke cycle, variable compression ratio, carburetted, CFR engine operated at constant speed. Research octane number (RON) provides a measure of the knock characteristics of motor fuels in automotive engines under mild conditions of operation. This International Standard is applicable for the entire scale range from 0 RON to 120 RON, but the working range is 40 RON to 120 RON. Typical motor fuel testing is in the range of 88 RON to 101 RON. This International Standard is applicable for oxygenate-containing fuels containing up to 4,0 % (m/m) oxygen. NOTE 1 Work is under way to check the possibility to use the method for gasoline containing up to 25 %(V/V) and up to 85 %(V/V) ethanol. Certain gases and fumes, such as halogenated refrigerants used in air-conditioning equipment, that can be present in the area where the CFR engine is located, may have a measurable effect on the RON rating. Electrical power transient voltage or frequency surges or distortion can affect RON ratings. NOTE 2 This International Standard specifies operating conditions in SI units but engine measurements may be specified in inch-pound units because these were the units used in the manufacture of the equipment, and thus some references in this International Standard include these units in parenthesis. NOTE 3 For the purposes of this standard, the terms “% (m/m)” and “% (V/V)” are used to represent the mass fraction (μ) and the volume fraction (φ) of a material respectively.
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