ASTM D2699-2008 Standard Test Method for Research Octane Number of Spark-Ignition Engine Fuel.pdf
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1、Designation: D 2699 08Designation: 237/87An American National StandardStandard Test Method forResearch Octane Number of Spark-Ignition Engine Fuel1This standard is issued under the fixed designation D 2699; the number immediately following the designation indicates the year oforiginal adoption or, i
2、n the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1
3、This laboratory test method covers the quantitativedetermination of the knock rating of liquid spark-ignitionengine fuel in terms of Research O.N., except that this testmethod may not be applicable to fuel and fuel components thatare primarily oxygenates.2The sample fuel is tested using astandardize
4、d single cylinder, four-stroke cycle, variable com-pression ratio, carbureted, CFR engine run in accordance witha defined set of operating conditions. The O.N. scale is definedby the volumetric composition of PRF blends. The sample fuelknock intensity is compared to that of one or more PRF blends.Th
5、e O.N. of the PRF blend that matches the K.I. of the samplefuel establishes the Research O.N.1.2 The O.N. scale covers the range from 0 to 120 octanenumber but this test method has a working range from 40 to120 Research O.N. Typical commercial fuels produced forspark-ignition engines rate in the 88
6、to 101 Research O.N.range. Testing of gasoline blend stocks or other process streammaterials can produce ratings at various levels throughout theResearch O.N. range.1.3 The values of operating conditions are stated in SI unitsand are considered standard. The values in parentheses are thehistorical i
7、nch-pound units. The standardized CFR enginemeasurements continue to be in inch-pound units only becauseof the extensive and expensive tooling that has been created forthis equipment.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is there
8、sponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specific hazardstatements, see Section 8, 13.4.1, 14.5.1, 15.6.1, Annex A1,A2.2.3.1, A2.2.3.3 (6) and (9), A2.3.5, X3.3.7, X4.2
9、.3.1,X4.3.4.1, X4.3.9.3, X4.3.11.4, and X4.5.1.8.2. Referenced Documents2.1 ASTM Standards:3D 1193 Specification for Reagent WaterD 2268 Test Method for Analysis of High-Purity n-Heptaneand Isooctane by Capillary Gas ChromatographyD 2360 Test Method for Trace Impurities in MonocyclicAromatic Hydroca
10、rbons by Gas ChromatographyD 2700 Test Method for Motor Octane Number of Spark-Ignition Engine FuelD 2885 Test Method for Determination of Octane Numberof Spark-Ignition Engine Fuels by On-Line Direct Com-parison TechniqueD 3703 Test Method for Hydroperoxide Number of Avia-tion Turbine Fuels, Gasoli
11、ne and Diesel FuelsD 4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD 4175 Terminology Relating to Petroleum, PetroleumProducts, and LubricantsD 4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD 4814 Specification forAutomotive Spark-Ignition EngineFuelD 5
12、842 Practice for Sampling and Handling of Fuels forVolatility MeasurementD 6304 Test Method for Determination of Water in Petro-leum Products, Lubricating Oils, and Additives by Coulo-metric Karl Fischer TitrationE 344 Terminology Relating to Thermometry and Hydrom-etryE 456 Terminology Relating to
13、Quality and Statistics1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.01 on Combustion Characteristics.Current edition approved May 1, 2008. Published June 2008. Originallyapproved in 1968. Last
14、 previous edition approved in 2007 as D 269907a.2Motor O.N., determined using Test Method D 2700, is a companion method toprovide a similar but typically lower octane rating under more severe operatingconditions.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Cus
15、tomer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocke
16、n, PA 19428-2959, United States.E 542 Practice for Calibration of Laboratory VolumetricApparatus2.2 ANSI Standard:4C-39.1 Requirements for Electrical Analog Indicating In-struments2.3 Energy Institute Standard:5IP 224/02 Determination of Low Lead Content of LightPetroleum Distillates by Dithizone Ex
17、traction and Colo-rimetric Method3. Terminology3.1 Definitions:3.1.1 accepted reference value, na value that serves as anagreed-upon reference for comparison, and which is derivedas: (1) a theoretical or established value, based on scientificprinciples, (2) an assigned or certified value, based on e
18、xperi-mental work of some national or international organization, or(3) a consensus or certified value, based on collaborativeexperimental work under the auspices of a scientific orengineering group. E 4563.1.1.1 DiscussionIn the context of this test method,accepted reference value is understood to
19、apply to the Researchoctane number of specific reference materials determinedempirically under reproducibility conditions by the NationalExchange Group or another recognized exchange testing orga-nization.3.1.2 Check Fuel, nfor quality control testing, a spark-ignition engine fuels of selected chara
20、cteristics having anoctane number accepted reference value (O.N.ARV) determinedby round-robin testing under reproducibility conditions.3.1.3 cylinder height, nfor the CFR engine, the relativevertical position of the engine cylinder with respect to thepiston at top dead center (tdc) or the top machin
21、ed surface ofthe crankcase.3.1.3.1 dial indicator reading, nfor the CFR engine,anumerical indication of cylinder height, in thousandths of aninch, indexed to a basic setting at a prescribed compressionpressure when the engine is motored.3.1.3.2 digital counter reading, nfor the CFR engine,anumerical
22、 indication of cylinder height, indexed to a basicsetting at a prescribed compression pressure when the engine ismotored.3.1.4 detonation meter, nfor knock testing, the signalconditioning instrumentation that accepts the electrical signalfrom the detonation pickup and provides an output signal fordi
23、splay.3.1.5 detonation pickup, nfor knock testing,amagnetostrictive-type transducer that threads into the enginecylinder and is exposed to combustion chamber pressure toprovide an electrical signal that is proportional to the rate-of-change of cylinder pressure.3.1.6 dynamic fuel level, nfor knock t
24、esting, test proce-dure in which the fuel-air ratio for maximum knock intensityfor sample and reference fuels is determined using the fallinglevel technique that changes carburetor fuel level from a highor rich mixture condition to a low or lean mixture condition, ata constant rate, causing knock in
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