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DOCUMENTS "COM"
COM(75)621
Vol.1975/0236

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COMMISSION OBTHEJ3UROÎMN COMMUNITT ^
COM(75 *621final
Brussels ,8December 1975
Proposai for a
COUNCIL DIRECTIVE
onthe approximation ofthe laws ofthe
Member States relating tothe measures
tobetaken against the emission of
pollutants from diesel engines for use
inwheeled agricultural orforestry
tractors
(submitted totheCouncil bytheCommission )
COM(75 )621final

EXPLAKATORY ï®:ORAKDUi ;
CÎSItjR'-L
This proposal for aDirective falls within the context oftheCommunity
type-approval procedure forwheeled agricultural orforestry tractors
which wasthesubject ofCouncil Directive 74/150/S3Cof4!Tarch 1974 (l)«
This proposal concerns thoapproximation ofthe laws oftheKember States
relating tothemeasures tobetaken against theemission ofpollutants from
compression –ignition engines (diesel engines )foruseinsuch tractors .
Such measures have proved necessary beaause these tractors represent an
increasing proportion ofroad traffic inrural areas oftheCommunity .
Asarule ,there isnoappreciable difference between themode ofopera­
tion ofdiesel engines intractors used onthe roads and that ofcommercial
vehicles fitted with the same type ofengine .Consequently ,asfar asthe
emission ofpollutants isconcerned ,the Commission considers itadvisable
inprinciple that tractor engines bemade subject tothetests andlimitations
already applicable tomotor vehicles under Council Directive 72/30'5/EECof
2August 1972 (2).Such ameasure would have theadvantage ofensuring fair
treatment for alldiesel-engined vehicles travelling onthe roads and of
simplifying thetask oftheauthorities responsible forthetype-approval
and inspection ofthese vehicles .
C01lu®7SONTH'j PRCPOSZD DriECTT /E
This proposed Directive islimited inscope towheeled agricultural or
forestry tractors which have amaximum design speed ofbetween 6and25km/h
(Article l).
(1)O.J. K°L84,23iîarch 1974 ,p.10.
U)O.J. N°L190 ,20August 1972 .

ThepurposeofArticle 2is"tciintegrate intotheE3Ctype-approval
procedure therequirement® relating -totheemission ofpollutants
fromdieselenginesusedinthesetractors .
Sincecertain MemberStateshavenonational type-approval procedure at
present,itisnecessary toletdownprovisions forensuring -theuse.inthose
Statesofvehicles complying withtherequirements of.theDirective »
(Article3)(*). -.
Intheeventofmodifications totheprototype ,theMemberStateconducting
thetype~approval mustbeinapositiontoassesswhether newtestsare
necessary (Article A)*
Article laysdowntheprocedure fortheadaptation totechnical progress
oftheprovisions oftheannexes(seealsoArticle13ofCouncilDirective
74/150/EECof4March1974onthetype–approvalofwheeledagricultural or
forestrytractor?).
Article6laysdown ,twotime-limits .Beforetheexpiryofthefirst,
HemberStatesarerequiredtoadoptandpublishthemeasures necessary to
complywiththeDirective .Thesecondtime-limit fixesthedateonwhich
allMemberStatesmustsimultaneously applythecommonrules(Article6,§l).
Lastly,theCommission mustbegivenreasonable noticeofanydraft
provisions formulated bythellemberStatesinthefieldcoveredbythe
Directive ;thiswillenabletheCommission toputforwardanyobservations
onthedraftconcerned (Article6§2)«
(*)OJN°L73f27March1972 i"Documents concerning theaocessionto
theEuropean Communities oftheKingdomofDenmark,Irelandandthe
UnitedKingdomofGreatBritainandNorthernIreland".Actconcerning
theConditions ofAccession andtheAdjustments totheTreaties-
AnnexI,TitleX.

-3-
Thetechnical annexessetoutthonecessary definitions ,theprocedure for
applyingforESCtype–approval ,thetestspecifications anddescriptions
andthelimitstobeobserved inrespectoftheopacityofthesmoke
emittedduringthetestundersteady-state operating conditions .
D«6irous oftakingintoaccountthespecificdifferences peculiartothe
operation oftractordieselenginesinroadtrafficconditions ,the
Commission ,inagreement withtheexpertsoftheWorkingPartyonTractors
andAgricultural Machinery ,considers itadvisable tomakeanumberof
changesintheabovementioned testwithrespecttothetestprescribed in
theDirective onmotorvehicles (7^/306/EEC).Accordingly ,thetestis
requiredtobecarriedoutat80-foofthemaximumengineloadinthecase•
oftractors ,insteadofunderfullloadasinthatofmotorvehicles ..
Furthermore ,thelowerlimitoftherangeofspeedstobeemployed must
bethespeedatwhichtheenginedevelopsitsmaximumtorqueinthecase
oftractors ,insteadof45$£oftheenginespeedcorresponding tomaximum -
powerasinthecaseofmotorvehicles.
CONSULTATION OFTHEEUROPEAN PARLIAIIENT ANDTHEECONOMIC ANDSOCIAL COKKHTEB
Inaccordance withtheprovisions ofArticle100(§2)oftheEECTreaty,
.i . <
theOpinionsofthesetwobodiesmustbesought.

-1-
COUTCIL
Council Directive
ontheapproximation ofthelaws oftheMember States relating tothe
measures tobetaken against theemission ofpollutants from diesel enrines
for use intractors
THECOUNCIL OFTHEEUROPE AllCOTJIUMTIES s
Having regard totheTreaty establishing theEuropean Economic Communit
andinparticular Article 100thereof ;
Having regard totheproposal from theCommission *
Having regard totheOpinion oftheEuropean Parliament ;
Having regard totheOpinion oftheEconomic andSocial Committee *
Whereas thetechnical requirements which tractors must satisfy accordance
with national lawa relate ,inter alia ,totheemission ofpollutants fron
dieeel engines foruse intractors 5
Whereas these requirements differ from oneMember State toanother ;whereas
itistherefore necessary that alltheIlember States adopt thesame require­
ments !either inaddition toorinplace oftheir existing rules ,inorder
toallow theEECtype approval prooeduro which wasthesub ,)tot
ofCouncil Directive Uo of4March 1974 ontheapproximation
ofthelaws oftheMember States relating tothetype approval ofagricultu­
raltractors andmachinery (l)tobeapplied inrespect ofeach type of
tractors ;
Whereas theapproximation ofnational laws relating totractors entails
reciprocal recognition byMembor States ofthetests -carried outbyeach
ofthem onthebasis ofcommon requirements ;whereas ,inorder toworfe properly
attoh asystatE involves theapplication ofthese requirements byallMiiAor
States with effect from thesame date ,
••t/•••
(1)O.J. n°L84of28/3/1974 ,p.10

-2-
HASADOPTED THISDIÏŒCTIVE :
Article 1
1,"Agricultural orforestrytractor*meansanymotorvehiclefittedwith
wheelsorcaterpillar tracks,.havingatleasttwoaxles,themainfunction
ofwhichliesinitstractive powerandwhichisspecially designedtotow,
push,carryorpowercertaintools,machinery ortrailers intendedforagric­
ulturalorforestryuse.It'maybeequippedtocarryaloadandpassengers .
2.ThisDirective shallapplyonlytotractors definedinthepreceding
paragraph whicharefittedwithpneumatic tyresandwhichhavetwoaxlesand
amaximumdesignspeed between 6and25kilometres perhour.
Article 2
NoMemberStatemayrefusetograntSECtype-approval ornational .,
typa-approval ofatractoronthegroundthatpollutants areemittedbythe
dieselengineiftiehdrivesthotractorifthetractorsatisfies therequirements
laiddown,inAnnexesI,II,IHjIVandVI.
*•: I 'i'*'}> \
.:• '-vArticle 3-'
NoMemberStatemayrefusetheregistration ormayprohibit .thesale,
entryintoservioeoruseofanytractoronthogroundthatpollutants ars
anittedbyth«SlSsel«np±newhichdrivesthetraotorifthetraotorsatisfies
therequireisiesats laiddownia-Annexes I,II,III,IVandVI.
».
Article 4
TheMemberStatewhichhasgrantedtypeapprovalshalltaketheneces­
sarymeasurestoensurethatitisinformed ofanymodification ofapartor
characteristicreferredtoinitem2.2ofAnnexI.Thecompetent authorities
ofthatStateshalldetermine nahethep freBhtestsshouldbecarriedout
onthemodifiedtractorandafreshreportdrawnup.Wheresuchtestsreveala
failuretocomplywiththerequirements ofthisDirective,thenedification
shallnotbeapproved *

Article 5
Theamendments necessary .toadapt th@provisions ofAnnexes ItoX
ofthis Directive tota'ce acoount oftechnical progress shall beadopted in
accordance with theprocedure laid down inArticle 13of "Council Directive Kb
74/150/EECof4March Vj-l-U
Article 6
1. Kenber States slrlladopt andpublish by1October 1977
provisions necessary tocomply with this Directive and shall forthwith
inform' the Commission thereof . •
They shall ir.plenent thes® provisions \*itheffect from 1April 1S78 .
2. After notification ofthis Directive ,Kember States ehall take etepc
toinforn theCotaciEBion ,insufficient tln*forittorralca comments ,ofany
draft laws ,regulations oradministrative ,provisions which ,they intend -to -.
adopt inthefiald covsrofi bythis Directive .
•» . * ; ' ►'
Article 7
This Directive isaddressed totheMember States .

ANIIEX .I(1).
DEFINITIONS ,APPLICATION FOREECTYPEi\PPP.OVAL ,STOOLOPTHE
COPlPLECTSD ABSORPTION COEFFICIENT .SPECIFICATIONS ANDTESTS AND
CONFOftMITY OPPRODUCTION .
(l.) •
2.DEFINITIONS ,
Forthepurposes ofthisDirective :
(2.1.)
2.2tractortypeasregardsthelimitation oftheemission ofpollutants
fromtheengine'meanstractors whichdonotdifferinsuchessential
.respects asthetractorandenginecharacteristics definedinAnnexIIj
2.3*'Dieselengine'meansanenginewhichworksonthecompression-ignition
principle ;
2*4*.'Cold-start device'meansadevicevihichbyitsoperation temporarily
.increases theamountoffuelsuppliedtotheengineandisintended
tofacilitate thestartingoftheengine; :
2,5.'Opacimeter' meansaninstrument forcontinuous measurement ofthe
absorption Coefficients ofthelight "bytheexhaustgases ,emitted
"bytractors .
3*APPLICATION FOREECTYPEAPPROVAL
3.1-.,Theapplication forapproval must "besubmitted bythetractormanu­
facturer orbyhisdulyaccredited representative .
3.2#Itmustbeaccompanied bytheundermentioned documents intriplicate
andthefollowing particulars :
3.2.1»adescription oftheenginetypeincluding alltheparticulars
referredtoinAnnexII;-''
3.2.2»drawings ofthecombustion chamberandoftheupperfaceofthepiston.
(l)Thesubdivision intopointsoftheAnnexestothisDirectiveisthegame
asthatoftheCouncilDirective 72/306/eECofthe2August 11972onthe
approximation oflawsoftheMemberstatesrelating tothemeasurestobe
takenagainsttheemission ofpollutants fromdieselenginesforusein
vehicles (O.J.n°L190of20/8/1972).

-s::"t•t
3*3*Anengineandtheequipment prescribed inAnnexIItotheRegulation
forfittingtothetractortobeapproved shall "besubmitted tothe
technical serviceconducting theapprovaltestsdefinedinitem5»
However,ifthemanufacturer so.requests andthetechnical service
conducting theapprovaltestsagrees,atestmay"becarriedouton
atractorrepresentative ofthetractortypetobeapproved.
3bis EECTYPEAFPROVAL ""-*';.• :i''■■.■.-
Acertificate conforming tothatshowninAnnexXshallbeattached
totheEECtypeapprovalcertificate#
4.SYKBOL OPTHECORRECTED ABSORPTION COEFFICIENT V
(4.10 /'"7''
(4.20
(4.30 ■:' '-7 •
4.4.'Toeverytractorconforming toatractortypeapproved underthis
Regulation thereshallbeaffixed,conspicuously andinareadily
accessible placespecified intheAnnextothstypeapproval .certifi­
cateshowninAnnexX,asymbolbeingarectangle surrounding a
■-figure -expressing inthecorrected absorption coefficient obtained ,
,atthetimeofapproval ,duringthetest ,underfreeacceleration ,.and
determined atthetimeofapproval bythemethoddescribed ilkitem
3.2.ofAnnexIV.
4.5''i:>Thesymbolmustbeclearlylegibleandindelible.
4»6»AnnexIXgivesanexampleofthesymbol.'
5.SPECIFICATIONS ANDTESTS
5.1.General ,'. '
Thecomponents liabletoaffecttheemissionofpollutants shallbe.
sodesigned,constructed andassembled astoenablethetractor ,ill
npi^naluse,despitethevibration towhichitmaybesubjected ,to
complywiththeprovisions ofthisDirective .
' ' ' **"*
5*2•.Specifications concerning cold-start devices
5.2.1.Thecold-start deviceshallbesodesigned andconstructed thatit
•cannotbebroughtintoorkeptinactionwhentheengineisrunning
"'normally..
5.2.2.Theprovisions ofitem5.2.1.aboveshallnotapplyifatleastone
c .ofthefollowing conditions is'met:••.......4*4*
4.5''i

AnnexI,page3
5.2.2.1.Thelightabsorption coefficient ofthegasesemitted "bytheengine
atsteadyspeedswhenmeasured "bythemethoddescribed inAnnexIII
withthecold–startdeviceoperating iswithinthelimitsprescribed
inAnnexVI.
5.2.2.2.Keepingthecold-start deviceinoperation causestheenginetostop
withinareasonable time.
5.3.Specifications concerning theemission ofpollutants .»
5.3.1,Theemission ofpollutants bythetractortypesubmitted forapproval
shallbemeasured bythetwomethodsdescribed inAnnexesIIIandIV,
relatingrespectively totestsatsteadyspeedsandtotestsunder
freeacceleration (l).
5.3.2.Theemission ofpollutants ,asmeasured bythemethoddescribed in
AnnexIII,shallnotexceedthelimitsprescribed inAnnexVI.
5.3.3«.Inthecaseofengineswithanexhaust-driven supercharger theabsorption
coefficient measured underfreeacceleration shallnotexceedthe
.limitprescribed inAnnexVIforthenominalflowvaluecorresponding
tothemaximumabsorption coefficient measured duringthetestsat
steadyspeeds,plus0,5m–1-.
5*4*'Equivalent measuring instruments shallbeallowed.Ifaninstrument
otherthanthosedescribed inAnnexVIIisused,proofofitsequi­
valencefortheengineconsidered shallberequired.
(6.)
(1)Atestunderfreeacceleration shallbecarriedout,especially inorder
toprovideareference figureforadministrationswhichusethismethod
tocheckvehicles inuse.

Annex I.page 4
7. CONFORMITÉ OPPRODUCTION
7«1» Every tractor intheseries must conform ,with regard tocomponents
affecting theemission ofpollutants bytheengine ,tothetractor' *-
type approved . •'
(7.2.)
7«3« Asageneral rule conformity ofthetractor -with theapproved type ■>
.asregards theemission ofpollutants from diesel motors shall be
verified onthebasis ofthedescription given intheAnnex -tothe
ESC approval certificate shown inAnnex X.Inaddition :
7.3.i.Where acheck iscarried outonavehicle taken from theseries *the *
tests shall becarried out asfollows : :
7»3*1*1»A tractor which hasnotbeen runinshall besubjected tothetest "**
under free acceleration described inAnnex IV.The vehicle shall be
deemed .toconform totheapproved type iftheabsorption coefficient
determined does notexceed bymore than 0,5m–1thefigure shown in
theapproval mark . 'v
7»3»l»2.If thefigure determined inthetest referred toinitem 7«3»1 »above
exceeds bymore than 0,5 thefigure shown intheapproval mark ,
atractor ofthetype considered oritsengine shall -besubjected to
thetest atsteady speeds over thefull-load curve ,asdescribed in
Annex III .Theemission levels shall not exceed thelimits prescribed
inAnnex VI.
(8.)
(9.

' •ANNEXII. . -:■.-
ESSENTIAL CHARACTERISTICS OPTHETRACTCR ANDTHE0TG3HEMD.......
NJPÓPJ.IATICIJ .CCAI0EHL TIHA-TIIE.CCAN)UC?R' OP.TESTS(X)
1,_,Description ofengine
1.1.Maire ....
1.2.,.Type .
1»3» .Cycle:four-stroke/-two-stroke (2)>•••••••••••••
1.4.Bore mm ■ ■
1.5.Strolce••••••••••••»••••«•••• Am
1.6.ÏTumberofcylinders
1*7*Cylinder capacity........... cm-'
1.8.Compression ratio(3)
>■> 6 * -f,
,Systemofcooling
1..10.Supercharger with/without('2)'description 'ofthesystem
•- -&»», ,
. . .•»>»1.11..Airfilter:drawings ,'ta*makes' "andtypes
2.Additional anti-smoke devices(ifany,andifnotcovered "byanother
•''-■heading )... ■"?
:•'««Description anddiagrams
3.*<'■>Airihthke' .an®fuelf^ed
3.1*Description anddiagrams ofairintakesandtheiraccessories
"(heatingdevice,intakesilencer,etc.) ■I.
3.2.'.Fuelfeed/.. ,"
*.' »ï•»;'
3.2.1.Féedpunp'
Pressure (3).............orcharacteristic diagram(3)
►'••1v,k .
3*2.2.Injector
3.2.2.1.Pump
3.2,2.1.1.Make(s) »
3*2.2«1.<V Type(s) •••••*•,*«•»•«
„3.2.2.1.3...Delivery...•••mm^perstrokeatpumpspeedof......rpm(3)at
."full'iri.jectiDil ;orcharacteristic .diagram(2)(3)
Mentionthemethodused:Onengine/onpumptestbench(2)
\-
. "+ ■9*w/m*
(l)Inthecaseofnon-conventional enginesandsystems,particulars )equivalent
tothosereferredtobelowshallbesupplied bythemanufacturer .
(2^Strilceoutwhatdoesnotapply.
(3)Specifythetolérance.

--iiïic::»>3'2
3*2.2.1.4 .Injection advance
3.2.2.I.4.I. Injectiori advwicecurve
3.2.2»1.4.2.Timing ..
3.2.2.2.Injection piping "'
3.2,2;2.iV 'rténgtKV..7...V.............. ..v..,....
3*2.2.2^2.'Internai <fi'ámetéi *Y.Y.V...
3.2.2,3»'Injectór(s )...Y..V.V.*.
3*2.2.3.1.Makc(s)».
3.2.2.3.2.Type(s)•••••
t^V. «*■» ...3*2.2.3«3 »Startingpressure "bars(2)-;
orcharacteristic diagram(t)(2)
3.2.2.4.Governor '* "■v J''
3.2.2.4.1.*Make(s) .............. ..........
3*2#2«4»2 »Typ©(fi)
3.2.2.4.3."Speeclcvfc'which?ctft-ofTBtartB*-und^r load»:
\ 'V-V f.. *':■*.-3.2.2.4»4«Maxinrun no«-lbadspoeds
3.2.2.4»5t ■Idlingspe,ed: rpm
•ί '-*. * -.·.·■ ·*.
3*3» Cold-start system
3»3vl«i-- ■-Maice(s).......»•»
3.3.2.Type(s)
3.3.3...Description
4. Valvetiming
4.1.'f'r'Maximumlift'ofvalves'and"anglesofopeningandelosingin
relation todeadcentres
4.2. Reference and/orsettingranges(l)..••*•••••••
5. Exhaust device
.•<*"T+.#t..t,->„ ^ *i'#*/,-, 4'Vi4Description anddiagrams
** ·>***»■· 4· ;.·* »·ν"'·*.
5.2.,Mean ,back-pressure atmaximumpower:••••••••••••••» »•■•••»...Pascal(Pa)
6.'""Transmissi6n*
6.U"v''Momentoi*inértlh."'6f'feh^ifte*flyt^ieel'
6.2."Additional momentof'inertiawithncrgear"engaged
'«-X*'
1)Strilce'outwhat-doesnotapply.t
2;Specifythetoleraaice .i'V.<' *

AnnexII,page3
7.Additional information on'testconditions
7*1*Lubricant used
7«1*2•.Type••••# «*•••
(Statepercentage ofoiliiimixtureiflubricant andfuelmixed)
8.Engineperformances
8.1.Idlingspeed rpm(2)
8.2.Enginespeedatmaximumpower rpmv.2) .v
8.3.Povreratthesixpointsofmeasurement referredtoinitem2.1.of
AnnexIII
8*3.1.Poweroftheenginemeasured onthetest "bench:indicatethestandard
followed (BSI-CIJNA-DDI-GOST-IGM-ISO-SAE,etc.)(l)
8.3.2.Powermeasured onthewheelsofthevehicle
Enginespeed(n) Measured power
rpm kl'I
1. ......................
:2.
3»
4.
5.
6.
(1)Strilceoutwhatdoesnotapply.
(2)Specifythetolérance

ANÏTEXIII
TESTATSTEADY SPEEDS
1,DPTROIXJCEJCCI .......... ...^*•"'v'<>">*«•*"*\v*• 'V-* .«.,/.T\,/ ..1
1.1.1This"eSiSieifc'S.escri'bfc&'thte' method *1of*•de^ermiainjvenri.esions of•pollutant's
vi,...atdifferent steadygpe.edsa-fc§0per.centofthemaximumload. .
1.2.Thetestmayhecarriedouteitheronanengineoronatlractor.
2. MEASUREMENT .PRINCIPLE
' . •-
■■'.■· ·■·■'-ν,■-·-·*..'^/ ·.·■'·<ί-· ■.·■*. *
2.1.Theopacity .ofthe.exhaust ^gasesproduced bytheengineshallhemea-r
suredwiththeenginerunningunder80percentoftheMaximumload
'andatsteadyspeed.;'Sixmeasurements shallhemadeatenginespeeds '
spacedoutuniformly betweenthatcorresponding tomaximumpowerand
thehigher ,ofthefollowing two.enginespeeds: ..
–engine^>eedcorresponding tomaximumtorque;and ''
-1000rpm. . •t
J-The--extremepoints,ofmeasurement shaJJ_J).e..situatedatthelimitsof
theinterval defined above..,
2v2vIn-thecaseof-diesel .engines .whichxi£e.£it„te.dwithan...airsupercharger
whichcp-n,Veengaged ,atwi}l,andinwhichenginestheentryinto
operation oftheairsupercharger automatically bringsaboutanincrease
*'**'■**'vifr'the "quSfltityof•ftiel"injected ;'the -measurements shall -hemadeboth
,-j,.with,and,withoutthe.supercharger forking.
-*'■•---,'cach:enginespeed,the*result vofthemeasurement shallbethe
,.,»higherofthetirofigur.esobtr.in.ecU ...
y,y*^wst:Ç£»IÎ)iticîïs ^ -■
3*1.Tractororengine
3.1.1.Theengineorthetractorshallbesubmitted ingoodmechanical
condition .Theengineshallhavebeenrunin.
3.1.2,Theengineshallbetestedwiththeequipment described inAnnexII.
3.1.3..Thesettingsoftheengineshallbethosedescribed bythemanufac­
turerandbyAnnexII.
3.1.4*Theexhaustdeviceshallnothaveanyorificethroughwhichthegases
emittedbytheenginemightbediluted..
3,1.5*Theengineshallbeinthenormaltforkingcondition prescribed bythe
manufacturer .Inparticular ,thecoolingwaterandtheoilshalleach
boatthe-normaltemperature indicated bythemanufacturer ..
*-•/••

AnnexIII.page2
Puel
Thefuelshall "bethereference fuelwhosospecifications aregivenin
AnnexV•
Testlaboratory
Theabsolute temperature Tofthelaboratory ,expressed inKelvin,and*
theatmospheric pressure H,expressed intorr,shallbemeasured ,and
thefactorFshallbedetermined bytheformula
»-<¥>°'65-<é>0'5
Foratesttoberecognized asvalid,thefactorFshallbesuch
that0,98£P£1,02.
Samplmg andmeasuring apuaratus ' •'
Thelight-absorption coefficient oftheexhaustgasesshallbemeasured
withanopacimeter satisfying theconditions laiddownin.AnnexVII*
andinstalled inconformity withAnnexVIII♦
LHHTVALUES ,.-'
Foreachofthesixenginespeedsatwhichtheabsorption coefficient
ismeasured pursuant toparagraph 2.1.above,thenominalgasflowG,*
expressed inlitrespersecond,shallbecalculated bymeansofthe
following formulae : *
-fortwo-stroke engxnes
-forfour-stroke engines
where:
Visthecylinder capacity oftheengineexpressed inlitres;and
nistheenginespeedinrevolutions perminute..
Foreachenginespeedtheabsorption coefficient ofthee^iiaustgases
shallnotexceedthelimitvaluegiveninthetableinAnnexVI,Where
thevalueofthenominalflowisnotoneofthosegiveninthattable,
thelimitvalueapplicable shallbeobtained byinterpolation 011the
principle ofproportional parts.G«
GVn
60
Vn
120

ÀNKKX TV
TESTUNDEiFIŒEACCELERATION
1. TESTCONDITIONS
1.1.Thetestshall "becarriedoutonthetractororenginewhichhas
undergone thetestatsteadyspeedsdescribed inAnnexIII. *V.'
1.1.1.Iftheengineistestedona"benchthetestshall "becarriedoutas1
soonaspossibleafterthetestformeasurement ofopacityatsteady
speeds.Inparticular ,thecoolingwaterandtheoilshallbeatthe
normaltemperatures indicated bythemanufacturer .
1.1.2.Ifthetestiscarriedoutonastationary tractor,theengineshall
firstbebroughttonormaloperating condition "tryaroadrun#The
testshallbecarriedoutassoonaspossibleaftercompletion of"
theroadrun. - .■
1.2.Thecombustion chambershallnothavebeencooledorfouledbya
prolonged periodofidlingpreceding thetest.
1.3*.Thetestconditions described inAnnexIII,items3»l*t3*2«and3.3.,
shallapply.
1.4.Theconditions described inAnnexIII,item3»4«,withregard ,tothe'
sampling andmeasuring apparatus shallapply.
2.TESTIŒTHODS ■
2.1.Ifthetestisabenchtest,theengineshallbedisconnected from
thebrake,thelatterbeingreplacedeitherbytherotatingparts
drivenwhennogearisengagedorbyaninertiasubstantially equi­
valenttothatoftherotatingparts.
2.2.Ifthetestiscarriedoutonatractor,thegear-change controlshall
besetintheneutralposition andtheengineingear,
2.3.Withtheengineidling,theaccelerator controlshallbeoperated
quickly,butnotviolently ,soastoobtainmaximumdelivery fromthe
injection pump.Thisposition shallbemaintained untilmaximumengine
speedisreachedandthegovernor comesintoaction.Assoonasthis
speedisreachedtheaccelerator shallbereleaseduntiltheengine
resumesitsidlingspeedandtheopacimeter revertstothecorrespond­
ingconditions .
2.4#Theoperation described initem2.3.aboveshallberepeated notless
thansixtimesinordertoclear *theexhaustsystemandtoallowfor
anynecessary adjustment oftheapparatus.Themaximumopacityvalues
readateachsuccessive acceleration shallbenoteduntilstabilized
valuesareobtained.Noaccoundshallbetakenofthevaluesreadwhile
theengineisidlingaftereachacceleration .Thevaluesreadshallbe
regarded asstabilized whenfourconsecutive readingsaresituated
withinabandwidthof0,25mr~'"enddonotformadecreasing sequence.
Theabsorption coefficient toberecordedshallbethearithmetic
meanofthesefourvalues.

AnnexXV,page2
Enginesfittedwithanairsupercharger shallbesubject,where
appropriate ,tothefollowing specialrequirements :
Inthecaseofengineswithanairsupercharger whichiscoupledwith
ordrivenmechanically bytheengineandiscapableofbeingdisengaged ,
twocomplete measurement cycleswithpreliminary accelerations shall
becarriedout,theairsupercharger beingengagedinonecaseand
disengaged intheother.Themeasurement resultrecorded shallbe
thehigherofthetworesultsobtained ;
Inthecaseofengineswithanairsupercharger whichcanbecutout
bymeansofadriver-operated bypass,thetestshallbecarriedout
withandwithoutthebypass.Themeasurement resultrecordedshall
bethehigheroftheresultsobtained.
DETERMIMTION OPTHECORRECTED VALUEOPTHEABSORPTION COEFFICIENT
Notation w
=valueoftheabsorption coefficient underfreeacceleration
measured asdescribed initem2»4»ofthisAnnex?
=corrected valueoftheabsorption coefficient underfree.. •
accélération :
M=va-'-ue "kkeabsorption coefficient measuredatsteadyspeed(AnnexIII,item2*1*)whichisclosesttotheprescribed limit
valuecorresponding tothesanenominalflow;
=valueoftheabsorption coefficient (AnnexIII,item'4.2.)for
thenominalflowcorresponding tothepointofmeasurement which
gavethevalueS^;
Leffective lengthofthelightpathintheopacimeter ,..
Whentheabsorption coefficients areexpressedinm–^andtheeffective
lengthofthe"lightpathinmetres,thecorrected valueis"given
bythesmallerofthefollowing twoexpressions :
H"X"'**°u^=**+°'5'

ANNEXV
SPECIFICATIONS OFREFERENCE FUELPiJESCRIBED FORAPPROVA LTESTSAND
TOVERIFY CC8IFOIMITY OFPRODUCTION
V .
Lxmitsandunits •Method
Density 15/4°C 0,830i0,005 ASTMD1298-67
Distillation ASTMD86-67
50fo min.245°C
901o ■330±10°C
Finalboilingpoint iaax.370°C
Cetaneindex 54±3 ASTMD976-66
Kineiaatic viscosity at100°F 3t0,5est ASTMD445-65
Sulphurcontent 0,4t0,1<fobyweight ASTMD129-64
Flash-point min«55°C•ASMD93-71
Cloudpoint max»–7°C ASMD2500-66
Anilinepoint 69t5°c ASTÎ-ID611-64
Carbonresidueon10%bottoms ■ma:s«0,2%bytreight ASTMD524-64
Ashcontent raax«0,C1^0bywei^it ASÏÏ4D482-63
Watercontent mec:#0,05^byweight ASTMD95-70
Copper-•corrosion testat100°Cncx«1 ASTMD130-68
Netcalorifio value (10250+100kcal/kg)
(18450+180BTU/lb)ASTMD2-68
(Ap,VI)
Strongacidnumber nilmgKolyg ASTI-1D974-64
Mote:Thefuelmustbebasedonlyonstraight-run distillates ,hydro–
>-* desulphurized ornot,endmustcontainnoadditives#

MNBCVI
LBCLTVALUES APPLICABLE MTHETESTATSTEA0X SPEEDS
Nominal flowG
/Absorption coefficient K
litres/second13–
42 2,26
45 2,19
50 •2,08
55 1,985
60, 1,90 .,
65 1,84
70 1,775
75 1,72
80 1,665
85 1,62
90 1,575
95 1,535
100 1,495
105 1,465
110 1,425
115 '' !,395
120•1,37
125 1,345
130 Ί»32
135 1,30
140 1,27
;'145 '1.25
150 '•1,225"~*
155 1,205 ,
160 1,19
165 ''1,17
170 1,155
1751,14
180 1,125
185 1,11
1901,095
195 1,08
200 1,065
Note:Although theabovevaluesareroundedtothenearest0,01or0,005,this
doesnotmeanthatthemeasurements needto"bemadetothi3degreeofaccuracy .

ANNEXVII
CHMACTEtilSTICS OFOPACIMETEtlS ,"
1. SCOPE
Thisannexdefinestheconditions to"bemetlayopacimeters usedin
thetestsdescribed inAnnexesIIIandIV.
2.BASICSPECIFICATION FOROPACIMETERS
2.1.Thegastobemeasuredshallbeconfinedinanenclosure havinga
non-reflecting internal surface.
2»2*...Indetermining ,the.effective lengthofthelightpaththroughthegas,
accountshallbetakenofthepossible influence ofdevicesprotecting
thelightsourceandthephotoelectric cell.Thiseffective length
shallbeindicated ontheinstrument .
2.,3....Theindicating dialoftheopacinjeter .shallhavetwomeasuringscales,orieillabsoluteunitsoflightabsorption from0to00(m–)andthe
otherlinearfrom0to100;bothscalesshallrangefrom0attotal
lightfluxtofullscaleatcomplete obscuration .-
3. ■COIISTHUCTIOJjI SPECIFICATIONS
3.1»General
Thedesignshallbesuchthatundersteady-speed operating conditions
thesmokechamberisfilledwithsnokeofuniformopacity.
3*2.Snokechamberandopacimeter casing
3.2,1.Theimpingement onthephotoelectric cellofstraylightdueto
internal reflections ordiffusion effectsshallbereducedtoa
"minimum (e.g.byfinishing'internalsurfacesinmattblackandbya
suitablegenerallayout).
3»2.2»Theopticalcharacteristics shallbesuchthatthecombinedeffectof
diffusion andreflection doesnotexceedoneunitonthelinearscale
i-jhsnthesmoke'chamberis'filledwithsmokehavinganabsorption "
coefficient near1,7m-1.
3.3»Lightsource
....vThelightsourceshallbe'anincandescent lampwith'acolour -tempe--
ratureintherange2.800to3*250XK.

AnnexVTI,page2
3*4»Receiver
3.4.1.Thereceivershallconsistofaphotoelectric cellwithaspectral
responsecurvesimilartothephotopiccurveofthehumaneye(maximum
responseintherange550/570nm;lessthan4percentofthatmaximum
response below430nmandabove680nm).
3.4.2.Theconstruction oftheelectrical circuit,including theindicating
dial,shallbesuchthatthecurrentoutputfromthephotoelectric
cellisalinearfunction oftheintensity ofthelightreceived over
theoperating-temperature rangeofthephotoelectric .cell.'
3.5.Ileasuring scales ':
3o.l.Thelight-absorption coefficient kshallbecalculated bytheformula
ffl=fDQ.e–whereListheeffectivelengthofthelightpaththrough
thegastobemeasured ,theincident fluxandQ)theemergent flux.
Whentheeffective lengthLofatypeofopacimeter cannotbeassessed
directly fromitsgeometry ,theeffective lengthLshallbedetermined
-eitherbythemethoddescribed initem4ofthisAnnex;of
-throughcorrelation withanothertypeofopacimeter forwhichthe
effective lengthisknown#
3.5.2.Therelationship betweenthe0-10Clinearscaleandthelightabsorption
.coefficient kisgivenbytheformula
k logc(1–
whereNisareading onthelinearscaleandkthecorresponding value
oftheabsorption coefficient .
3.5.3.Theindicating dialoftheopacimeter shallenableanabsorption ,
coefficient of1,7 •
3*6.Settingand'testingofthemeasuring apparatus
<
3.6.1.Theelectrical circuitofthephotoelectric cellandoftheirdxcating
.dialshallboadjustable sothatthepointercanberesetatzerowhen
thelightfluxpassesthroughthesmokechamberfilledwithcleanair
orthroughachamberhavingidentical characteristics .
3.6.2*.VJiththelampswitchedoffandtheelectrical measuring circuitopou
orshort-circuited ,thereading ontheabsorption-coefficient soale
shallbe00,anditshallremainat00withthemeasuring circuit
reconnected .

Annex VII ,page 13
3»°*3 .«Anintermediate check shall "becarried out ,byplacing inthe sraoke
1, .'chamber ascreen ,representing agaswhose known .1ight-abso rption
coefficient k,measured asdespribed initem 3.5.I. ,isbetween
1,6m-iand1,8m-J-.Trievalue ofkmust beknown towithin 0,025 m-l.
Thecheck consists .inverifying that this value does notdiffer by
more than 0,05 m–*-from that read ontheopacimeter indicating dial
when thescreen isintroduced between thesource oflight andthe
■photoelectric cell . ..
3»7* Opacimeter response - -.
3»7»1 *Theresponse time oftheelectrical measuring circuit ,being the
time necessary fortheindicating dial toreach ,90percent of
full-scale deflection oninsertion ofascreen fully obscuring the
•photoelectric cell ,shall be0,9to1,1second .
3«7*2 ».Thedamping oftheelectrical measuring oircuit shall besuch that
'theinitial overswing beyond thefinal steady reading after any
momentary variation ininput (e.g. thecalibration screen )does not
,,exceed 4per cent ofthat reading inlinear -scale units .-
.v ,- ' :
3»7*3 »'"heresponse time oftheopacimeter vdiich isduetophysical phenomena
inthesmoke chamber isthetime ,"between ••thebeginning oftheentry ,
ofthegasinto themeasuring apparatus -andthecomplete filling of
thesmoke chamber ;itshall notexceed 0,4second .
3»7«4 «These provisions shall apply solely toopacimeters used tomeasure
.opacity under free acceleration .
3.8. Pressure ofthegastobemeasure andofscavenging air
3.8.1 .Thepressure oftheexhaust gasinthesmoke chamber shall notdiffer
bymore than 735 from theatmospheric pressure .
3.8.2 .Thevariations inthepressure ofthegastobemeasured andofthe
- scavenging airshall notcause theabsorption coefficient ,tovary .•
bymore than 0,05 in;thecase ofagashaving anabsorption
: •coefficient of1,7mJ-,.
3.8.3 .Theopacimeter shall beequipped vdth appropriate devices formeasur­
ingthepressure inthe smoke chamber . ,,, •... ■ >•
3.8.4 ..Thelimits ofpressure variation ofgasandscavenging airinthe
smoke chamber shall beindicated bythemanufacturer oftheapparatus .
3.9* Temperature ofthegastobemeasured
•«/••

Annexvil,page4
3,9.1.Ateverypointinthesmoke :-chamberthegastemperature attheinstant
•ofmeasurement shallberTjetfjeen ;70°Candamaximumtemperature ,specif-
'iedbytheopacimeter manufacturer ,.suchthatthereadings overthis
temperature rangedonotvary"aymorethan0,1ifthechamberisfilledwithagashavinganabsorption coefficient of1,7m-1.
\« ■
3.9.2,Theopacimeter shallbeequipped withappropriate devicesformeasur­
ingthetemperature inthesmokechamber. '
4.EFFECTIVE LENGTH'L'OPTHEOPACBdETER
4.1»General ■. ■■ ■
4.1.1..Insometypesofopacimeter the£asbetweenthelightsourceandthe
photoelectric cell,orbetweentransparent partsprotecting thesource
andthephotoelectric cell,i£not-ofconstant opacity Insuchcases
theeffective lengthLshallbethatofacolumnofgasofuniform
opacitywhichgivesthesameabsorption oflightasthatobtained .
whenthegasisadmittedinanormalwayintotheopacimeter .
4.1.2.Theeffective lengthof-the-lightpathisobtained bycomparing the
reading Noftheopacimeter operating normally withthereading N
obtained withtheopacimeter modified sothatthetestgasfills
awelldefinedlengthL.
; • 0
4.1.3*'I"twillbenecessary totakecomparative readingsinquicksuccession
todetermine thecorrection tobemadeforshiftsofzero.
4.2»Methodofassessment ofL
4
4.2.1.Thetestgasshallbeexhaustgasofconstant opacityoralight-
absorptive gasofagravimetric densitysimilartothatofthe
exhausgas.
4.2.2.AcolumnoflengthLoftheopacimeter ,whichcanbefilleduniformly
withthetestgases,andtheendsofwhicharesubstantially atright
anglestothelightpath,shallbeaccurately determined .Thislength
Lqshallbeclosetothepresumedeffectivelengthoftheopacimeter .
4.2.3.Themeantemperature ofthetestgasinthesmokechambershallbe
measured .
4.2.4.Ifnecessary ,anexpansion tankofcompactdesignandofsufficient
capacity todampthepulsations maybeincorporated inthesampling
lineasneartotheprobeaspossible.Acoolermayalsobefitted.
Theaddition oftheexpansion tankandofthecoolermustnotunduly .
disturbthecomposition oftheexhaustgas.

s#
.'*»
iJÎIlKYiï|lî
4«2,5«Thetestfordetermining theeffective lengthshallconsistofpassing
:'•asampleoftestgasalternately 'throughtheopacimeter operating
normally andthroughthesameapparatus modified asindicated -in
-'item4.1.2, • ■ ,
4»2»5»l«The opacimeter readingsshall "berecordedcontinuously duringthe
test :witharecorder whoseresponse timeisequaltoorshorterthan
thatoftheopacimeter#
4»2.5*2»With theopacimeter operating normally,the_readingonthelinear
scaleofopacityisHandthatofthemeangastemperature expressed
inKelvinisT.
' *
4.2,5.3.V!ith theknownlengthLfilledwiththesanetestgas,thereading
onthelinearscaleofopacityisNandthatofthemeangastemper­
atureexpressed inKelvinisT,
4»2«6,';,The effective lengthwillbe'
•;" -,_1.ν ■ :,,Tl0{;'1100'
~S....<■' ii=Jj5T*" 1'.■»»11
■r oT •. N ',• .»,;V
■'<'•'- °l0r*(1–2.) ■ ■-V
■.■■■■>..f.,-- AOlAX100'
4»2.7»Thetestshall "berepeated withatleastfourtestgasesgiving
'readings evenlyspaced "betweenthe20and80onthelinearscale,;
• .. Ϋ.·;**··.'-
4.2,8,Theeffective lengthLoftheopacimeter vri.llhethearithnetic mean
oftheeffectivelengthsobtainedasstatedinitem4»6»witheach-^
ofthegases.

iSNES VIII
TNSTALLAT IQNMDUSE OPTIIE OPACIMETEK
1. SCOPE
This annex specifies theinstallation anduse ofopacimeters forthe
tests described inAnnexes III and IV,
2. S/KIPLING OPACIMETER .
•*• \
2.1. Installation forsteady«speed tests
2.1.1 .Theratio ofthecross –sectional area oftheprobe tothat ofthe
exhaust pipe shall not "beless than 0,05 »The "back pressure measured
intheexhaust pipe attheintake oftheprobe shall notexceed 735Pa.
2.1.2 .Theprobe shall "beatube xjith anopen endfacing forwards intheaxis
oftheexhaust pipe ,oroftheextension pipe ifoneisrequired .It
shall besituated inasection where the distribution ofsmoke is
approximately uniform# Toachieve this ,theprobe shall beplaced
asfardownstream intheexhaust pipe aspossible ,or,ifnecessary ,
inanextension pipe sothat ,ifDisthediameter oftheexhaust
pipe attheoutlet ,theendoftheprobe issituated inastraight
portion atleast 6Dinlength upstream ofthesampling point and
3Dinlength downstream .Ifanextension pipe isused ,noairshall
beallowed toenter the joint . .
2.1.3 .Thepressure intheexhaust pipe andthecharacteristics ofthe
pressure drop inthesampling line shall besuch that theprobe
collects asample substantially equivalent tothat which would bo
obtained byisokinetic sampling .
2.1.4 .Ifnecessary ,anexpansion tank ofcompact design andofsufficient'
capacity todamp thepulsations maybeincorporated inthe' sampling
line asnear totheprobe aspossible .Acooler mayalso befitted .
Thedesign oftheexpansion tank andcooler shall ,notunduly disturb
thecomposition oftheexhaust gas. •' '
* •
2.1.5 .Abutterfly valve orother means ofincreasing thesampling pressure
maybeplaced inthe exhaust pipe atleast three 3Ddownstream from
thesampling probe . '
2.1.6 .Theconnecting pipes between theprobe ,thecooling device ,theexpan -
•sion tank (ifrequired )andtheopacimeter shall beasshort as
possible while satisfying thepressure andtemperature requirements
described inAnnex VII ,items 3.8and3.9.Thepipe shall beinclined
upvjards from the sampling point totheopacimeter ,andsharp bends .
where soot might accumulate shall beavoided *Ifnot embodied inthe
opaciiieter ,a "bypass valve shall beprovided upstream ..2.1.4 *
2.1.5 .

Achockshall "bocarriedoutduringthetesttoensurethatthe
requirements ofAnnexVI,item3«8.,concerning pressure andthose
ofAnnexVII,item3»9*»concerning thetemperature inthemeasuring
chamberareobserved.
Installation fortestsunderfreeacceleration
Theratioofthecross--soctional areaoftheprobetothatofthe
exhaustpipeshallnotbelessthan0,05•Thebackpressure measured
intheexhaustpipeattheintakeoftheprobeshallnotexceed735Pa*
Theprobeshallbeatubewithanopenendfacingfon/ardsintheaxis
oftheexhaustpipe,oroftheextension pipeifoneisrequired.It
shallbesituated inasection wherethedistribution ofsmokeis.
approximately uniform.Toachievethis,theprobeshallbeplacedas
fardownstream intheexhaustpipeaspossible or,ifnecessary ,in
anextension pipesothat,ifDisthediameter oftheexhaustpipe
attheoutlet,theendoftheprobeissituatedinastraightportion
atleast6Dinlengthupstreamofthesamplingpointand3Dinlength
downstream .Ifanextension pipeisused,noairshallboallowedto
enterthejoint.
Thesampling systemshallbesuchthatatallenginespeedsthepres­
sureofthesampleattheopacimeter iswithinthelimitsspecified
inAnnexVII,item3*8.2.Thismaybecheckedbynotingthesample
pressure atengineidlingandmaximumno*-loadspeeds.Depending on
thecharacteristics oftheopacimeter ,controlofsamplepressure can
beachieved byafixedrestriction orabutterfly valveintheexhaust
pipeorextension pipe.IJhichever methodisused,thebackpressure -
measuredintheexhaustpipeattheintakeoftheprobeshdllnot
exceed735Pa*
Thepipesconnecting withtheopacimeter shallbeasshortaspossible.
Thepipeshallbeinclined upvjardsfromthesamplingpointtothe
opacimeter ,andsharpbendswheresootmightaccumulate shallbe-
avoided.Abypass -valvenaybeprovided upstream oftheopacimeter
toisolateitfromtheexhaust-gas flowwhennomeasurement isbeing
made.
FULL-FLON OPACIMETER .
Theonlygeneralprecautions tobeobsorved .insteady --speedandfree-
acceleration testsarethefollowing :
'Jointsintheconnecting pipesbetweentheexhaustpipeandtheopaci-
metershallnotallowairtoenterfromoutside.
ThepipescorjaecCin ^withtheopacimeter shallbeasshortaspossible ,
asinthecaseofsamplingopacimeters .Thepipesystemshallbein­
clinedupwardsfromtheexhaustpipetotheopacimeter ,andsharpbends

Annex VIII .page 3
where soot might accumulate shall beavoided *A"bypass valve may
beprovided upstream oftheopacimeter toisolate itfrom the
e:diaust~3as flow v;hennomeasurement isbeing made .
Acooling system Kayalso berequired upstream oftheopacimeter .

.jfflNEXIX .
EXAMPLE OPTHESMSOL OPTIECORRECTED /iBSORPTICST COEbTICISMT
1,30/
\\
}
(_tMinimumdimensions la»5t6mm
Theabovesymbolshows "thatthecorrected absorption coefficient is1,30m–±»

ΛΝΝΞΧΧ
Naneofadministration
ANNEXTOTHEEECTYPEAPPROVAL CERTIFICATE CUTTHEEMISSION OP
GASEOUS POLLUTANTS BYDIESEL ENGINES
(Article4(2)aMArticle10oftheCouncilDirective of11March1974on
theapproximation of-thelawsoftheMemberStatesrelatingtothetype
approvalofagriculturer tractorsandmachinery )
EECTypeApproval Number(l)
Piegist.ered jluoher(l).f..
1*Tradenameormarkofthevehicle
2.,„.Vehicletype
3,,Manufacturer 'sname.and.address•••••*••••••••»••••••••••••••«•••••••<
4«0Ifapplicable ,.nameaij4addressofmanufacturer 'srepresentative
5«Emission levels
5,1.Atsteadyspeeds
l 1 1 !
Enginespeed
(rpm)Nominal flowG
(litres/second)Limitabsorption j
values(m–1)
1Measured absorption
values(o–*-)
1. ...., 1
.1
j
U......L.............
J .......U.... I ...J !
... . . J
I 1[1
iI
(l)Deletewhichever doesnotapply.

iJIHEXX,page2
.•M»î,'• '>'.s "'4
5.2.Underfreeaccélération .
5.2.1.Measuredabsorption value ...m-1
5.2.2.Corrected absorption value
6..Makeandtypeoftheopacimeter
7.Enginesubmitted forapprovaltestson
8.Technical serviceconducting approvaltests
9.Date'oftestreportissuedbythatservice••••••••••••••••»••••.••»•••
1Q.JJufflber-of -teat-yeportissuedby-that •service
11.-Approvalgranted/refused(l)
-1-2*•-Site.ofapproval markonthevehicle
13»,Place
14»-Date
1>.vSignature 4...».
16.Thefollowing document^bearingtheapproval numbershownabove,are
annexedto.incommunication .
1copyofAnnexIIdulycompleted together withthedrawings and
diagrams referredto" '
' photograph(s )oftheengine.
(l)Deletewhichever doesnotapply.\