1、Designation:D550098(Reapproved 2014)Standard Test Method forVehicle Evaluation of Unleaded Automotive Spark-IgnitionEngine Fuel for Intake Valve Deposit Formation1This standard is issued under the fixed designation D5500;the number immediately following the designation indicates the year oforiginal
2、adoption or,in 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.1.Scope1.1 This test method covers a vehicle test procedure forevaluation of intake va
3、lve deposit formation of unleadedspark-ignition engine fuels.This test method uses a 1985model BMW 318i2vehicle.Mileage is accumulated followinga specified driving schedule on either public road or test track.This test method is adapted from the original BMW of NorthAmerica/Southwest Research Instit
4、ute Intake Valve Deposittest and maintains as much commonality as possible with theoriginal test.Chassis dynamometers shall not be used for thistest procedure as the BMW NA/SwRI IVD Test was notintended to be applicable to chassis dynamometers and nocorrelation between road operation and chassis dyn
5、amometershas been established.NOTE1If there is any doubt as to the latest edition of Test MethodD5500,contact ASTM International.1.2 The values stated in SI units are to be regarded asstandard.The values in parentheses are for information only.1.3 This standard does not purport to address all of the
6、safety concerns,if any,associated with its use.It is theresponsibility 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.Specific statementson hazards are given throughout this test method.2.Refe
7、renced Documents2.1 ASTM Standards:3D235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)2.2 ANSI Standard:MC 96.1 American National Standard for Temperature Mea-surement Thermocouples43.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 alterna
8、te mileage accumulation(AMA)driving cycle,na driving schedule that is based on the U.S.EnvironmentalProtection Agency Durability Driving Schedule,which con-tains various driving patterns for durability testing of emissioncontrol systems.53.1.2 base fuel,nunleaded automotive spark-ignition en-gine fu
9、el that does not contain a deposit control additive,butmaycontainantioxidants,corrosioninhibitors,metaldeactivators,and oxygenates.3.1.3 deposit control additive,nmaterial added to the basefuel to prevent or remove deposits in the entire engine intakesystem.3.1.3.1 DiscussionFor the purpose of this
10、test method,theperformance evaluation of a deposit control additive is limitedto the tulip area of intake valves.3.1.4 driveability,nthe quality of a vehicles performancecharacteristics as perceived by the operator in response tochanges in throttle position.3.1.4.1 DiscussionThe performance characte
11、ristics mayinclude cold starting and warm-up,acceleration,vapor lock,and hot starting.3.1.5 intake system,ncomponents of the engine whosefunction it is to prepare and deliver an air/fuel mixture to thecombustion chamber and includes the throttle,intake manifoldhot spot and runners,exhaust gas recirc
12、ulation(EGR)andpositive crankcase ventilation(PCV)ports,cylinder headrunners and ports,intake valves,and fuel injectors.3.1.6 intake valve deposit,nmaterial accumulated on thetulip area of the intake valve,generally composed of carbon,other fuel,lubricant,and additive decomposition products,andatmos
13、pheric contaminants.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.A0.01 on Gasoline and Gasoline-Oxygenate Blends.Current edition approved Oct.1,2014.Published November 2014.Origi
14、nallyapproved in 1994.Last previous edition approved in 2008 as D5500 98(2008).DOI:10.1520/D5500-98R14.2Originally obtained from BMW NAnew car dealerships in the United States asa 1985 model year vehicle,the vehicle is currently available through the usedvehicle market.3For referenced ASTM standards
15、,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY
16、10036,http:/www.ansi.org.5Code of Federal Regulations,Title 40,Part 86,Appendix IV.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.7 merit rating,nthe visual evaluation by a trainedrater of the volume of deposits accumulated on a specificengine component based on a comparison with a referencescale(see CRC Manual 166).3.1.8 test fuel,nbase fuel with or without the addition ofa deposit control additive which is used to accumulate mi
