1、Designation:D642120Standard 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
2、,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.Scope*1.1 This test method covers a bench test procedure toevaluate the tendency of automotive
3、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(
4、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,met
5、aldeactivators,dyes,depositcontroladditives,demulsifiers,or oxygenates,or a combination thereof.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.4 This standard does not p
6、urport 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific precautionary statement
7、s are given throughout this testmethod.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 SpecificationD4814.1.5 This international standard was developed in ac
8、cor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM
9、Standards:3D4175 Terminology Relating to Petroleum Products,LiquidFuels,and LubricantsD4814 Specification for Automotive Spark-Ignition EngineFuelD5500 Test Method for Vehicle Evaluation of UnleadedAutomotive Spark-Ignition Engine Fuel for Intake ValveDeposit FormationD5598 Test Method for Evaluatin
10、g 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
11、 Amendment:6Clean Air Act Amendments of 1990,Public Law 101549,Title 1 Provisions for Attainment and Maintenance ofNational Air Quality Standards3.Terminology3.1 For general terminology,refer to Terminology D4175.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,
12、Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.A0.01 on Gasoline and Gasoline-Oxygenate Blends.Current edition approved April 1,2020.Published April 2020.Originallyapproved in 1999.Last previous edition approved in 2019 as D6421 19.DOI:10.1520/D6421-20.2“A Program to
13、 Evaluate a Bench Scale Test Method to Determine the DepositForming Tendencies of Port Fuel Injectors,”available from Coordinating ResearchCouncil,Inc.,5755 North Point Parkway,Suite 265,Alpharetta,GA 30022,http:/www.crcao.org.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcont
14、act 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 Ca
15、lifornia 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
16、.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.3.2 Definiti