ASTM D2699-16e1

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

SIGNIFICANCE AND USE
5.1 Research O.N. correlates with commercial automotive spark-ignition engine antiknock performance under mild conditions of operation.  
5.2 Research O.N. is used by engine manufacturers, petroleum refiners and marketers, and in commerce as a primary specification measurement related to the matching of fuels and engines.  
5.2.1 Empirical correlations that permit calculation of automotive antiknock performance are based on the general equation:
Values of k1,  k2, and k3 vary with vehicles and vehicle populations and are based on road-O.N. determinations.  
5.2.2 Research O.N., in conjunction with Motor O.N., defines the antiknock index of automotive spark-ignition engine fuels, in accordance with Specification D4814. The antiknock index of a fuel approximates the Road octane ratings for many vehicles, is posted on retail dispensing pumps in the U.S., and is referred to in vehicle manuals.
This is more commonly presented as:
5.2.3 Research O.N. is also used either alone or in conjunction with other factors to define the Road O.N. capabilities of spark-ignition engine fuels for vehicles operating in areas of the world other than the United States.  
5.3 Research O.N. is used for measuring the antiknock performance of spark-ignition engine fuels that contain oxygenates.  
5.4 Research O.N. is important in relation to the specifications for spark-ignition engine fuels used in stationary and other nonautomotive engine applications.
SCOPE
1.1 This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel in terms of Research O.N., 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.2 The sample fuel is tested using a standardized single cylinder, four-stroke cycle, variable compression ratio, carbureted, CFR engine run in accordance with a defined set of operating conditions. The O.N. scale is defined by the volumetric composition of PRF blends. The sample fuel knock intensity is compared to that of one or more PRF blends. The O.N. of the PRF blend that matches the K.I. of the sample fuel establishes the Research O.N.  
1.2 The O.N. scale covers the range from 0 to 120 octane number but this test method has a working range from 40 to 120 Research O.N. Typical commercial fuels produced for spark-ignition engines rate in the 88 to 101 Research O.N. range. Testing of gasoline blend stocks or other process stream materials can produce ratings at various levels throughout the Research O.N. range.  
1.3 The values of operating conditions are stated in SI units and are considered standard. The values in parentheses are the historical inch-pound 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.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see Section 8, 14.4.1, 15.5.1, 16.6.1, Annex A1, A2.2.3.1, A2.2.3.3 (6) and (9), A2.3.5, X3.3.7, X4.2.3.1, X4.3.4.1, X4.3.9.3, X4.3.11.4, and X4.5.1.8.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 30-Nov-2016
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.01 - Combustion Characteristics

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation: D2699 − 16
Designation: 237/87
Standard Test Method for
1
Research Octane Number of Spark-Ignition Engine Fuel
This standard is issued under the fixed designation D2699; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1
ε NOTE—Subsection 7.1.1 was corrected editorially in May 2017.
1. Scope* responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
1.1 This laboratory test method covers the quantitative
bility of regulatory limitations prior to use. For specific
determination of the knock rating of liquid spark-ignition
warning statements, see Section 8, 14.4.1, 15.5.1, 16.6.1,
engine fuel in terms of Research O.N., including fuels that
Annex A1, A2.2.3.1, A2.2.3.3 (6) and (9), A2.3.5, X3.3.7,
contain up to 25 % v/v of ethanol. However, this test method
X4.2.3.1, X4.3.4.1, X4.3.9.3, X4.3.11.4, and X4.5.1.8.
may not be applicable to fuel and fuel components that are
2 1.5 This international standard was developed in accor-
primarily oxygenates. The sample fuel is tested using a
dance with internationally recognized principles on standard-
standardized single cylinder, four-stroke cycle, variable com-
ization established in the Decision on Principles for the
pression ratio, carbureted, CFR engine run in accordance with
Development of International Standards, Guides and Recom-
a defined set of operating conditions.The O.N. scale is defined
mendations issued by the World Trade Organization Technical
by the volumetric composition of PRF blends.The sample fuel
Barriers to Trade (TBT) Committee.
knockintensityiscomparedtothatofoneormorePRFblends.
The O.N. of the PRF blend that matches the K.I. of the sample
2. Referenced Documents
fuel establishes the Research O.N.
3
2.1 ASTM Standards:
1.2 The O.N. scale covers the range from 0 to 120 octane
D1193 Specification for Reagent Water
number but this test method has a working range from 40 to
D2268 Test Method for Analysis of High-Purity n-Heptane
120 Research O.N. Typical commercial fuels produced for
and Isooctane by Capillary Gas Chromatography
spark-ignition engines rate in the 88 to 101 Research O.N.
D2360 Test Method for Trace Impurities in Monocyclic
range. Testing of gasoline blend stocks or other process stream
Aromatic Hydrocarbons by Gas Chromatography (With-
materials can produce ratings at various levels throughout the
4
drawn 2016)
Research O.N. range.
D2700 Test Method for Motor Octane Number of Spark-
1.3 The values of operating conditions are stated in SI units
Ignition Engine Fuel
and are considered standard. The values in parentheses are the
D2885 Test Method for Determination of Octane Number of
historical inch-pound units. The standardized CFR engine
Spark-Ignition Engine Fuels by On-Line Direct Compari-
measurements continue to be in inch-pound units only because
son Technique
oftheextensiveandexpensivetoolingthathasbeencreatedfor
D3703 Test Method for Hydroperoxide Number of Aviation
this equipment.
Turbine Fuels, Gasoline and Diesel Fuels
1.4 This standard does not purport to address all of the D4057 Practice for Manual Sampling of Petroleum and
safety concerns, if any, associated with its use. It is the
Petroleum Products
D4175 Terminology Relating to Petroleum Products, Liquid
Fuels, and Lubricants
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.01 on Combustion Characteristics.
3
Current edition approved Dec. 1, 2016. Published January 2017. Originally For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approved in 1968. Last previous edition approved in 2015 as D2699 – 15a. DOI: contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
10.1520/D2699-16E01. Standards volume information, refer to the standard’s Document Summary page on
2
Motor O.N., determined using Test Method D2700, is a companion method to the ASTM website.
4
provide a similar but typically lower octane rating under more severe operating The last approved version of this historical standard is referenced on
conditions. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
´1
D2699 − 16
D4177 Practice for Automatic Sampling of Petroleum and inch,
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: D2699 − 16 D2699 − 16
Designation: 237/87
Standard Test Method for
1
Research Octane Number of Spark-Ignition Engine Fuel
This standard is issued under the fixed designation D2699; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1
ε NOTE—Subsection 7.1.1 was corrected editorially in May 2017.
1. Scope*
1.1 This laboratory test method covers the quantitative determination of the knock rating of liquid spark-ignition engine fuel
in terms of Research O.N., including fuels that contain up to 25 % v/v of ethanol. However, this test method may not be applicable
2
to fuel and fuel components that are primarily oxygenates. The sample fuel is tested using a standardized single cylinder,
four-stroke cycle, variable compression ratio, carbureted, CFR engine run in accordance with a defined set of operating conditions.
The O.N. scale is defined by the volumetric composition of PRF blends. The sample fuel knock intensity is compared to that of
one or more PRF blends. The O.N. of the PRF blend that matches the K.I. of the sample fuel establishes the Research O.N.
1.2 The O.N. scale covers the range from 0 to 120 octane number but this test method has a working range from 40 to 120
Research O.N. Typical commercial fuels produced for spark-ignition engines rate in the 88 to 101 Research O.N. range. Testing
of gasoline blend stocks or other process stream materials can produce ratings at various levels throughout the Research O.N.
range.
1.3 The values of operating conditions are stated in SI units and are considered standard. The values in parentheses are the
historical inch-pound 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.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use. For specific warning statements, see Section 8, 14.4.1, 15.5.1, 16.6.1, Annex A1, A2.2.3.1, A2.2.3.3 (6)
and (9), A2.3.5, X3.3.7, X4.2.3.1, X4.3.4.1, X4.3.9.3, X4.3.11.4, and X4.5.1.8.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D2268 Test Method for Analysis of High-Purity n-Heptane and Isooctane by Capillary Gas Chromatography
4
D2360 Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography (Withdrawn 2016)
D2700 Test Method for Motor Octane Number of Spark-Ignition Engine Fuel
D2885 Test Method for Determination of Octane Number of Spark-Ignition Engine Fuels by On-Line Direct Comparison
Technique
D3703 Test Method for Hydroperoxide Number of Aviation Turbine Fuels, Gasoline and Diesel Fuels
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.01 on Combustion Characteristics.
Current edition approved Dec. 1, 2016. Published January 2017. Originally approved in 1968. Last previous edition approved in 2015 as D2699 – 15a. DOI:
10.1520/D2699-16.10.1520/D2699-16E01.
2
Motor O.N., determined using Test Method D2700, is a companion method to provide a similar but typically lower octane rating under more severe operating conditions.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken,
...