ASTM_D_6421_-_99a_2014.pdf

Designation:D642199a(Reapproved 2014)Standard Test Method forEvaluating Automotive Spark-Ignition Engine Fuel forElectronic Port Fuel Injector Fouling by Bench Procedure1This standard is issued under the fixed designation D6421;the number immediately following the designation indicates the year oforiginal 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 bench test procedure toevaluate the tendency of automotive spark-ignition engine fuelto foul electronic port fuel injectors(PFI).The test methodutilizes a bench apparatus equipped with Bosch injectorsspecified for use in a 1985-1987 Chrysler 2.2-L turbochargedengine.This test method is based on a test procedure developedby the Coordinating Research Council(CRC)for prediction ofthe tendency of spark-ignition engine fuel to form deposits inthe small metering clearances of injectors in a port fuelinjection engine(see CRC Report No.592).21.2 The test method is applicable to spark-ignition enginefuels,which may contain antioxidants,corrosion inhibitors,metaldeactivators,dyes,depositcontroladditives,demulsifiers,or oxygenates,or a combination thereof.1.3 The values stated in SI units are to be regarded as thestandard.Approximate inch-pound units are shown in paren-theses for information purposes only.1.4 This standard does not purport to address all of thesafety 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 precau-tionary statements are given throughout this test method.NOTE1If there is any doubt as to the latest edition of Test MethodD6421,contact ASTM International Headquarters.Other properties ofsignificance to spark-ignition engine fuel are described in SpecificationD4814.2.Referenced Documents2.1 ASTM Standards:3D4814 Specification for Automotive Spark-Ignition EngineFuelD5598 Test Method for Evaluating Unleaded AutomotiveSpark-Ignition Engine Fuel for Electronic Port Fuel Injec-tor Fouling2.2 ANSI Standard:4MC 96.1 American National Standard for Temperature Mea-surement Thermocouples2.3 CARB Standard:5Test Method for Evaluating Port Fuel Injector(PFI)Depos-its in Vehicle Engines2.4 Clean Air Act Amendment:6Clean Air Act Amendments of 1990,Public Law 101549,Title 1 Provisions for Attainment and Maintenance ofNational Air Quality Standards3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 base fuel,nunleaded automotive spark-ignition en-gine fuel that does not contain a deposit control additive butmaycontainantioxidants,corrosioninhibitors,metaldeactivators,dyes,or oxygenates,or a combination thereof.3.1.2 cycle,na 15-s pulsing period,followed by a 50-minheating period at 160C(320F),followed by a 10-mincool-down period.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.Originallyapproved in 1999.Last previous edition approved in 2009 as D642199a(2009).DOI:10.1520/D6421-99AR14.2“A Program to Evaluate a Bench Scale Test Method to Determine the DepositForming Tendencies of Port Fuel Injectors,”available from Coordinating ResearchCouncil,Inc.,219 Perimeter Ctr.Pkwy.,Atlanta,GA 30346.3For referenced ASTM standards,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 10036,http:/www.ansi.org.5Available from California Air Resources Board,P.O.Box 2815,Sacramento,CA 95815.(Incorporated by reference in California Code of Regulations,Title 13,Section 2257.)6Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 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 purposes of this test method,the performance of a deposit control additive is limited to theelectronic PFI tip areas.3.1.4 driveability,nthe quality of a vehicles performancecharacteristics as perceived by the operator in response tochanges in throttle position.3.1.5 electronic port fuel injector(PFI),nan electrome-chanical device used to control fuel flow in an internalcombustion engine.3.1.6 fouling,vformation of carbonaceous deposits on thepintle or