【英文标准名称】:StandardTestMethodforEvaluationofAerationResistanceofEngineOilsinDirect-InjectedTurbochargedAutomotiveDieselEngine
【原文标准名称】:直接喷射式涡轮增压汽车柴油发动机用机油的抗混气性能评价的标准试验方法
【标准号】:ASTMD6894-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.B0.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:aeration;automotive;dieselengine;EOAT;foaming;heavy-duty;HEUI;medium-duty;Aerationresistance;ASTMTestMonitoringCenter(TMC2);Automotiveenginefuels/oils;Dieselenginefueloils;EOAT(engineoilaerationtest);Foaming
【摘要】:Background8212;IntheHEUIfuelsystem,theengineoilfromtheoilsumpnotonlylubricatestheengine,italsosuppliesahigh-pressureoilsystemthattakesoilfromthemaingalleryandpressurizesitupto20.7MPainaplungerpump(seeFig.A1.1).Thisoilisusedtooperateunitinjectorsthat,whenusedincombinationwithintensifiers,increasethefuelinjectionpressureupto145MPa,independentofenginespeed.Theelectroniccontrolspermitvariedinjectiontiminganddurationtoprovideoptimumfueleconomyandemissions.Thissystemmay,however,circulatealltheoilinthesumpinapproximately8s;asaconsequence,aerationoftheoilcanoccurwithsomeengineoils.Internationaldeterminedthat8%oilaerationwasthelimitbeyondwhichengineoperationandperformancewouldbeimpairedinactualservice.Priorto1994,theabilityofanenginelubricanttoresistaerationwasmeasuredbyTestMethodD892.DuringthedevelopmentoftheAPICG-4categoryin1994,however,itwasfoundthatthisbenchtestdidnotcorrelatewithaerationintheInternationalT444Eengine.TheEOATwasdeveloped,therefore,toprovideabettermeasurementoftheabilityofalubricanttoresistaerationduringengineoperation.ThistesthasbeenincludedinAPICG-4,CH-4,andCI-4categoriesforheavy-dutydieselengineoils.Method8212;Thedataobtainedfromtheuseofthistestmethodprovideacomparativeindexoftheaerationresistanceofengineoilsusedinmedium-andheavy-dutytruckdieselengines.Use8212;Thetendencyofengineoilstoaerateindirect-injection,turbochargeddieselenginesisinfluencedbyavarietyoffactors,includingengineoilformulationvariables,oiltemperature,sumpdesignandcapacity,residencetimeoftheoilinthesump,andthedesignofthepressurizedoilsystems.Insomeengine-oil-activatedinjectionsystems,theresidencetimeoftheoilinthesumpisinsufficienttoallowdissipationofaerationfromtheoil.Asaconsequence,aeratedoilcanbecirculatedtotheinjectorintensifiers,adverselyaffectingtheinjectiontimingcharacteristicsandengineoperation.1.1Thistestmethodwasdesignedtoevaluateanengineoil''sresistancetoaerationinautomotivedieselengineservice.ItiscommonlyreferredtoastheEngineOilAerationTest(EOAT).Thetestisconductedusingaspecified7.3L,direct-injection,turbochargeddieselengineonadynamometerteststand.ThistestmethodwasdevelopedasareplacementforTestMethodD892afteritwasdeterminedthatthisbenchtestdidnotcorrelatewithoilaerationinactualservice.TheEOATwasfirstincludedinAPIServiceCategoryCG-4in1995.Note18212;CompaniontestmethodsusedtoevaluateengineoilperformanceforspecificationrequirementsarediscussedinthelatestrevisionofSpecificationD4485.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.2.1Exception8212;WherethereisnodirectSIequivalent,forexample,screwthreads,nationalpipethreads/diameters,andtubingsize.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety......
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:12P.;A4
【正文语种】:英语


Product Code:SAE J1001
Title:Industrial Flail Mowers and Power Rakes
Issuing Committee:Optc1, Personnel Protection (General)
Scope:The purpose of this report is to establish guidelines for operator and bystander protection for flail mowers and flail power rakes whose intended use falls within the scope of this document. The guidelines for operator and bystander protection in this recommended practice apply to towed, semi-mounted or mounted flail mowers and flail power rakes when powered by a propelling tractor or machine of at least 15 kw (20 hp), intended for marketing as industrial mowing equipment and designed for cutting grass and other growth in public use areas such as parks, cemeteries and along roadways and highways. The use of the word 'industrial' is not to be confused with 'in-plant industrial equipment.' This document does not apply to: 1) turf care equipment primarily designed for personal use, consumption or enjoyment of a consumer in or around a permanent or temporary household or residence; 2) machines designed primarily for agricultural purposes but which may be used for industrial use; and 3) self powered or self propelled mowers or mowing machines./where other standards are referenced, such reference applies only to the doucment identified, not revisions thereof.