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SRPS B.H8.136:2015

Standard Test Method for Motor Octane Number of Spark-Ignition Engine Fuel

Mar 24, 2015

General information

60.60     Mar 24, 2015

ISS

B028-2

75.160.20  

English  

van plana 2014

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Scope

This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Motor octane number, including fuels that contain up to 25 % v/v of ethanol. However, this test method may not be applicable to fuel and fuel components that are primarily oxygenates. The sample fuel is tested in a standardized single cylinder, four-stroke cycle, variable compression ratio, carbureted, CFR engine run in accordance with a defined set of operating conditions. The octane number scale is defined by the volumetric composition of primary reference fuel blends. The sample fuel knock intensity is compared to that of one or more primary reference fuel blends. The octane number of the primary reference fuel blend that matches the knock intensity of the sample fuel establishes the Motor octane number. The octane number scale covers the range from 0 to 120 octane number, but this test method has a working range from 40 to 120 octane number. Typical commercial fuels produced for automotive spark-ignition engines rate in the 80 to 90 Motor octane number range. Typical commercial fuels produced for aviation spark-ignition engines rate in the 98 to 102 Motor octane number range. Testing of gasoline blend stocks or other process stream materials can produce ratings at various levels throughout the Motor octane number range. The values of operating conditions are stated in SI units and are considered standard. The values in parentheses are the historical inch-pounds units. The standardized CFR engine measurements continue to be in inch-pound units only because of the extensive and expensive tooling that has been created for this equipment.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS B.H8.136:2014

NOW

PUBLISHED
SRPS B.H8.136:2015
60.60 Standard published
Mar 24, 2015

Related project

Adopted from ASTM D2700-14

Regulation

Pravilnik o tehničkim i drugim zahtevima za tečna goriva naftnog porekla

MINISTARSTVO ENERGETIKE, RAZVOJA I ZAŠTITE ŽIVOTNE SREDINE