ARCHIVES HISTORIQUES
DELACOMMISSION
COLLECTION RELIEE DES
DOCUMENTS "COM"
COM (74)207
Vol.1974/0041

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COMMISSION OFTHEEUROPEAN CQMMUMÏTES
COM(74)207 final
Drossels .22February 1974
Proposal foraCouncil directive
adapting totechnical progress oftheCouncil directive of20March 1970
ontheapproximation ofthelaws oftheMember States relating tothe
measures to "betaken against airpollution bygases from sparkignition
engines ofmotor vehicles
(70/220/EEC)
(submitted totheCouncil "bytheCommission )
C0M(74 )207final

EXPLOITATION
I.GENERAL
Theapplication oftheprovisions oftheCouncildirective
of20March1970(70/220/EEC)relatingto"measuresto"be
takenagainstairpollution "byexhaustgasesfromsparlc
ignitionenginesofmotorvehicles"(l)hasalreadyled
toanimportant reduction ofemissions ofcarbonmonoxide
andunburnthydrocarbons fromthesevehicleswithinthe
Community .Meanwhile ,inthatwhichconcernstheworld
situation regarding airpollution ,thiseffecthas,insome
measure,beenoffsetbytheconstant growthinthevehicle
population .This,together withtheneedfortheprotection
ofhealthandtheenvironment ,makeitnecessary toincrease
theseverity oftheprovisions ofthisdirective .
Duringthistime,the.findings oftheWorking Groupof
experts "AirPollution duetomotorvehicles-Technical
Aspects!l.haveshownthattheintervening technical progress
madeintheconstruction ofenginesallowsforthefurther
reduction ,intheshortterm,oftheadmissible limitsof
emissions .Baseclonthesefindings ,thetechnical services
responsible totheCommission have ,formulated aproposal
foradirective modifying theabovementioned directive ,
•tfhichessentially ,providesfora20foreductioninthelimits
relatingtocarbonmonoxide ,anda15$reduction inthose
,relatingtounburnthydrocarbons .Inaddition ,the
^regulations concerning thetestrelatingtoemissions of
.carbonmonoxideatidlingspeedshavebeenmodifiedin
thesensethattheprescribed limitmustberespected at
allthepossiblesettings ofthecarburettors .Together ,
thesemodifications will,whenapplied,represent anet/
andimportant reduction inairpollution frommotorvehicles
(1)O.J.CE.Ho.L76of6Aprii1970p.1.

-2-
andanimportant contribution totheimprovement ofthe
urbanenvironment .
Conforming totheprovisions ofArtiolcs 11,12and13of
theCouncilDirective of5February 1970,concerning "the
type-approval ofmotorvehiclesandtheirtrailers"(2),
andtoArticle 5oftheCouncildirective of1torch1970,
concerning "themeasurestobetakenagainstairpollution
byexhaustgasesfromsparkignition enginesofmotorvehicles"
(l),theCommission askedfor,on10October1973»theopinion
ofthe"MotorVehicles "Committee onthedraftoftheabove
mentioned directive .
Thetechnical contentofthisdrafthasbeenapproved bythe
Committee ,but,duetoadifference ofopinionasregardsthe
dateofapplication ofthevariousprovisions ofArticle 2,
particularly thatwhichconcernsthemodifications ofthetest
relatingtoemissions atidlingspeeds,theCommittee didnot
findthemajorityrequiredtogiveafavourable opiniononthe
draft.Sincethen,inaccordance withtheprocedure laiddown
inArticle13paragraph 3(b)oftheabovementioned Council
directive of6February 1970(2),theCommission isrequiredto
submittotheCouncil,withoutdelay,aproposalrelatingto-
themeasures tobetaken.
Sinceconsulting theCommittee ,therehavebeenchangesin
thepositions takenbytheGovernments ofcertainMemberStates.
TheCommission'sServices ,afterhavingcontacted theexperts
oftheseGovernments ,-examinedthenewsituation .Becauseof
theresultsthusobtained ,thepresentdraftenvisages achieving
thesameoperative dateforthemodifiedtestrelatingtothe
emissions ofcarbonmonoxide ,atidlingspeeds,thatis1October
1976.Theotherprovisions proposedinthedraftremainunchanged .
(1)O.J.CENo.L76of6April,1970,p.l.
(2)O.J.CENo.L42of23February 1970p.l.

-3~
ThefirstArticleofthisdraftdirective allowsthereplacement
ofthetextofcertainpointsoftheAnnexesoftheDirective
of20Iforch1970(70/220/SEC)bynewrequirements v;hichareshown
intheAnnexoftheamendingdirective .Article 2fixesthe
duedatesforadoption ,publication ,andapplication ofthe
newregulations .
II.CONCLUSIONS AIT)PROPOSAIS .
Theabovehaving "beentakenintoaccount,itisproposed by
theCommission toapprovethisdraftproposal foradirective
andtosubmitittotheCouncilinaccordance withtheprocedure
laiddowninArticle13paragraph 3(b)oftheCouncildirective
of5February 1970concerning "type-approval ofmotorvehicles
andtheirtrailers"(l).
(1)Ο.σ.<Τ3.ΙΤο.I,76of6April1970,p.l.

-4-
THECOMMISSION OPTHEEUROPEA2T COMMUNITIES ,
Havingregard "totheTreatyestablishing theEuropean Economic .
Community -
Havingregardtotheproposal fromtheCommission ;
HavingregardtotheCouncilDirective of5February 1970onthe
approximation ofthelawsoftheMemberStatesrelatingtothetype–
approvalofmotorvehiclesandtheirtrailers (70/150/EHC),amended
bytheActannexedtotheTreatyofAccession totheEECandEAEC
signedbythenewMembersinBrusselson22January1972^,andin
particular toArticles 11,12and13thereof ;
HavingregardtotheCouncilDirective of6February 1970onthe
approximation ofthelawsoftheMemberStatesrelatingtothemeasures
tobetakenagainstairpollution .bygasesfromspark-ignition engines
ofmotorvehicles(70/220/EEC)\amendedbytheActannexedtothe
TreatyofAccession totheEECandEAECsignedbythenewMember
StatesinBrusselson22January1972^,andinparticulartoArticle
3thereof ;
Whereastheprotection ofthepopulation against ,increasing
atmospheric pollution ,particularly intowns,necessitates active
measuresforreducing theemissions ofpolluting gasesproduced by
sparkignitionenginesintendedforthepropulsion' ofvehicles ,
andassuchareduction oftheadmissible limitsofemissions is
madepossible bytheprogress madeintheconstruction ofthese
engines *
OJECNo.L76,20March1970,p.l.
OJECNo.L42,23February 1970,p.l.
OJECNo.L7.3,27March1972,pp.9,10,115and157-

-5-
-whereasmthefuturetheseenginesshallheequipped by
carburettors whichallowtorespectthespecified limits
concerning theemissions duringoperation atidlingspeed
inanyposition oftheadjustment components atthedisposal
oftheuser;
-Whereastheexperience acquired byapplyingthepresent
specifications ofthedirective' 70/220/E5CoftheCouncil
of20March1970hasshownthatitisconvenient tomodify
thesespecifications inordertofacilitate theexecution
oftheforeseentestsbytheapprovedorganisations ;
-Whereasitisalsoconvenient tomakecertainmodifications
simplifying theadministrative procedure ofthetype-approval ■
ofavehicleconcerning theemissions ofpollutants ,especially
inorder ,toallowtheextension ofthetype-approval tovehicle
typeswhichdifferfromtheoriginal approved typebytheir
weightand/ortheirgearratios;
-WhereastheCommission submitted on10October1973}aproposal
foramendment fortheopinionoftheCommittee onthe
adaptiontotechnical progress ofthedirectives aimedatthe
removal oftechnical barriers totradeinthemotorvehicle
sector,andwhichopinionwasnotfavourable finaccordance
withtheprocedurelaiddowninArticle13paragraph 3(b)of
theCouncildirection of6February 1970concerning type-
approvalofmotorvehiclesandtheirtrailers (l),the
Commission hasproposedtotheCouncilthemeasurestobe
taken; '
(l)OJE.C.Ho.LJ6,20March1970,p.l.

-6-
HASADOPTED THISDIRECTIVE :
Article 1
TheJxxm.ex.eaItoVtotheCouncilDirective of20March1970
(70/220/CEE)aremodifiedaccordingtotheAnnextothepresent .
Directive .
Article 2
1.Witheffectfrom1January 1975 "theMemberStatesshallnot
ongroundsrelatingtotheairpollution bygasesfrompositive
ignitionengine(s)forits/theirpropulsion :
-refuseEECtypeapproval ,thedelivery ofthedocuments
referredtoinArticle10(l),lastsub-section ,ofthe
CouncilDirective of6February1970(70/156/EEC)orthe
nationaltypeapproval ofatypeofmotorvehicle ;
-notprohibit .theentryintoserviceofthevehicles ;
iftheemissions ofpolluting gasesofthistypeofvehicle
oi*ofthesevehicles complywiththeprovisions oftheCouncil
Directive of20March1970(70/220/EEC)asherebyamended,
2.From1October 1975onwardstheIfemberStates;
-shallnolongerdeliverthedocument envisaged inArticle
10(l),lastsub-section ,oftheCouncilDirective of
6February1970(70/153/EEC)foratypeofvehicleof
whichtheemissionofpolluting gasesdoesnotcomplywith
theprovision oftheCouncilDirective of20March'1970
(70/220/EEC)asherebyamended,inthatwhichconcerns
AnnexesI(withtheexception ofpoint3.2.1.2.2.),II,
IVpoint1.2andV;.
-mayrefusethenational type-approval ofatypeofvehicle
ofwhichtheemission ofpolluting gasesdoesnotcomply
withtheprovisions oftheCouncilDirective of20Iferch
1970(70/220/EEC)asamendedhereby,inthatwhichconcerns
theAnnexesI(withtheexception ofpoint3.2.1.2.2.),
II,IVpoint1.2andV.

-7-
-shallprohibittheentryintoserviceofvehicles ofwhich
theemissions ofpolluting gasdonotconformtothe
regulations oftheCouncildirective of20March1970
(70/220/EEC)asamendedhereby,inthatwhichconcerns
AnnexesI(withtheexception ofpoifrfct3.2.1.2.2 .),H,
IVpoint1.2andV.
3.Prom1October 1976onwardstheMemberStates:
-shallnolongerdeliverthedocumentenvisaged inArticle10(l),
lastsub-section ,oftheCouncilDirective of6February 1970
(70/156/KEC)foratypeofvehicleofwhichtheemissionof
polluting gasesdocsnotcomplywiththeprovision oftheCouncil
Directiveof20March1970(70/220/EEC)asherebyamended,in
thatwhichconcerns AnnexesI,point3.2.1.2.2 .andIVpoint1.5;
-mayrefusethenational type~approval ofatypeofvehicle
ofwhichtheemission ofpolluting gasesdoesnotcomplywith
theprovisions oftheCouncilDirective of20ferch1970
(70/220/EEC)asamendedhereby,inthatwhichconcerns
.AnnexesIpoint3.2.1.2.2 .andIVpoint1.5;
-shallprohibittheentryintoserviceofvehiclesofwhich
theemissions ofpolluting gasdonotConformtothe
regulations oftheCouncildirective of20March1970
(70/220/EEC)asamendedhereby,inthatwhichconcerns
AnnexesIpoint3.2.1.2.2 .andIVpoint1.5.
4.TheMemberStatesshalladoptandpublishtheprovisions
necessary inordertocomplywiththisDirective before
1.October1974andshallforthwith informtheCommission
thereof .
Article 3 ■
ThisDirective isaddressed toalltheMemberStates.<

Xl/335/73-E
Λ3ΤΗΕΧ
Modifications oftheannexesoftheCouncilDirective
70/220/EECof20March1970 ■
AlffiEXI
IEPIIUTIONS ,APPLICATION POREEC-APPROVAL ,
DESCRIPTION OFTESTS
Point3.2,1.1^40 shallread:
3.2.1.1.4 .Subjecttotheprovisions ofparagraph 3.2.1.1.5 ."below,the
testshallberepeatedthreetimes.Ineachtest,themass
ofthecarbonmonoxide andthemassofthehydrocarbons
obtained mustbeless,foravehicleofgivenreference weight,
thantheamounts showninthetablebelow.
Reference weight
(rw)
kilogrammesMassof
•'carbon monoxide
igrammes ,pertest
!:5.::-,Ib,scof
hydrocarbons grammes
pertest
I■'L2
1 –
rw/750 80
750<rv;i850 87 7.1
850<.rw.<1020 94 7.4
1020s.rw<<1250 107 1 8.0
1250<rw41470 122 8,6
1470<rw4l700 '!. ....^ 9.2
1700<rw<$1930 149...:,9.7
1930<rw42150 162 ,10.3
.2150< ..175|10.9
»
3.2.1.1.4.1.Nevertheless ,.foreachofthepollutants referredtointhe
foregoing point,oneofthethreeresultsobtained mayexceed
.bynotmorethan10percentthelimitprescribed inthat..
pointforthevehicle ,concerned ,providedthearithmetical
meanofthethreeresultsisbelowtheprescribed limit.
Incaseswheretheprescribed limitsareexceeded formore
thanonepollutant ,itshallbeimmaterial whetherthis
occursinthesametestorindifferent tests.

..2- viI/335/73-E
Afterthispoint,thefollowing newpoint3.2.1.1.5 .shall "beadded:
3.2.1.1.5 .Thenumberoftestsprescribed inpoint3.2.1.1.4 .shall
hereducedintheconditions hereinafter defined,where
V^istheresultofthefirsttestandVgtheresultofthe
secondtestforeachofthepollutants referredtoinpoint
3.2.1.1.4 .
3.2.1.1.5.1.Onlyonetestshallhemadeif,for"boththepollutants
concerned ,K.0.70L.
3.2,1.1.5.2.Onlytwotestsshall "bemadeif,for"boththepollutants
concerned,V^^;:O.85L"but.foratleastoneofthepollutants
0.70L.Inaddition ,foreachofthepollutants
concerned ,mustsatisfytherequirements thatV^+V^
<1.70LandV2<L,
.Atpoint3.2.1.2.2.add..thefollowing sentence :
3.2.1.2.2 .Thisrequirement ,shallheverifiedinthemannere:q?lained
inannexIV,inallconditions resulting fromtheadjustment
ofthevariousadjustment .components available tousers.
Afterpoint3.2.1.3.3 .addthefollowing newpoint4:-r- J
<4. EXTENSION OPAPPROVAL ;
i
4.1 Vehicletypesofdifferent reference weights
Approvalofavehicletypemayunderthefollowing conditions
--beextendedtovehicletype5which .differfromthetype
approvedonlyinrespectoftheirreference weight.
4.1.1.Approval mayboezctendedtovehicletypesofareference
•weightrequiring merelytheuseofthenexthigherornext
lowerequivalent inertia.••

-3- XI/335/73-E
Ifthereference weightofthevehicletypeforwhich
extension oftheapprovalisrequested requires theuseof
aflywheel ofequivalent' inertia'higherthanthatusedfor
thevehicletypealreadyapproved ,extension oftheapproval
shall "begranted.''' '■•
Ifthereference weightofthevehicletypeforwhich
extension oftheapprovalisrequested requirestheuseof
aflywheel ofequivalent inertialowerthanthatusedfor
thevehicletypealreadyapproved ,extension oftheapproval
shall "begrantedifthemassesofthepollutants obtained
fromthevehiclealreadyapproved arewithinthelimits
prescribed forthevehicleforwhichextension ofthe
approvalisrequested .
Vehicletypeswithdifferent overallgearratios
Approval grantedtoavehicletypemayunderthefollowing
conditions "beextendedtovehicletypesdiffering fromthe
typeapproved onlyinrespect .oftheiroveralltransmission
ratios : .
Foreachtransmission ratiosusedinthetypeItost,
itshallbenecessary todetermine theproportion E=->./'2-•y1,
wherev^and-v;garerespectively thespeedat "V^
1000r.p.m.oftheengineofthevehicle "typeapproved
andthespeedofthevehicletypeforwhichextension ofthe
approvalisrequested .
IfforeachgearratioE^5percent,theextension shallbe
grantedwithoutrepeating thetypeItests.
IfforatleastonegearratioE5percentandifforeach
gearratioE10percent,thetypeItestsshallbe
.repeated butmaybeperformed inalaboratory chosenbythe
manufacturer ,subjecttotheapproval oftheAdministration
granting approval.Thereportsofthetestsshallbesent
totherecognized laboratory .

Xl/335/73-E
4.3 Vehicle "timesofdifferent reference weightsanddifferent
overn,lltransmission ratios
Approval grantedtoavehiclenaybeextendedtovehicle
typesdiffering fromtheapproved typeonlyinrespectoftheir
reference weightsandtheiroveralltransmission ratios,
providedthatalltheconditions prescribed in;pQ.intiS;"a::
4.1to4.2abovearefulfilled .
4.4. Note
Whenavehicletypehasbeenapprovedinaccordance withthe
provisions ofpoints 4,1."to4.3.above,suchapproval
maynotbeextendedtoothervehicletypes.
Haplpcenthictioint 3.2.2,bythefollowing newpoint5J
5. COETORMITY OFPRODUCTION
5.1.' Asageneralrule,conformity ofproduction withregardto
thelimitation oftheemissions ofgaseouspollutants bythe
engineisverified onthebasisofthedescription given
inthecommunication according toAnnexVIIandifnecessary ,
bymeansofallorsome'ofthetestsoftyposI,IIorIII
referredtoinpoint3.2.
5.1.1.Forverifying theconformity ofthevehicleinatype--Itest,
thefollowing procédure isadopted :
5*1.1.1.Avehicleistakenfromtheseriesandsubjected tothet'est
described inparagraph 3.2.1.1.However ,thelimitvalues
showninparagraph 3.2.1.1.4 .arereplaced bythefollowing
limitvalues:

-5- XI/335/73-E
Reference weight
(rw)
kilogrammes! Macs of
.carton jnçnoxide , .
grammes psrtestvv ;yIfe,ss of
hydrocarbons
grammes pertost
■•• l2- ;
rw4750 r 9^ 8.8
750<rw 4.850 105 9.3
850<rw4-1020 112 9.6
!1020<rw^1250 | 129 10.4
125O^rw 4147O 145 11.1
BJ70<rw41700• .162 ! 11.9
1700<rw <1930 : j 178 12.6
1930/rw42150 1 195 13.3
2150<(rw 211I .14.1
1
5.1.1.2 . Ifthevehicle taken from the series docs notsatisfy the
requirements ofparagraph 5«l*l»l»j themanufacturer mayask
formeasurements tobeperformed onasample ofvehicles
taken from the series ,andincluding thevehicle originally
taken .The manufacturer shall determine the size nofthe
sample .Vehicles other than thevehicle originally taken
shall besubjected toasingle typo Itest .Theresult tobe
taken into consideration forthevehicle taken originally is
thearithmetical mean oftheresults ofthethree type •Itests
carried outonthevehicles .Thearithmetical ooan Zoftheresult
obtained with thesample andthestandard deviation S(l)
ofthe sample shall then bedetermined foreach gaseous
pollutant .Theproduction ofthe series shall then bedeemed
toconform ifthefollowing condition ismet :
2:+k<>S»
wheres
L*the limit value laid dovm inparagraph 5»1»1»1 »?oreach
gaseous pollutant considered ;and
k=astatistical factor dependent onnandgiven inthe
following table :
cd s2-
n--l,where xisanyoneoftheindividual results
obtained with the sample n.

-6- XI/335/73-E
Q2 3L±J!5 6 iT~
\ , ! ,,8 9 10m [0.973 |j0.613 0.452I0.421 0.376 i0.342 ]roTTTT|0.2$6 |I0.272
LiJLiLJ Γ12 113 514 |15 L1617nn–m
Ik
»0.265 0.253 0.2â3 <!0.233T 0.224 0.216 7)7210 OoT ÔTT^
. 0.860k=.......
5.1.2 . Inatype XIor "type IIItest carried outonavehicle taken
from theseries ,theconditions laid down inpoints 3*2 .1.2 .2.
and 3.2.1.3.2 .shall "becomplied with .
5.1.3 . Notwithstanding theprovisions ofparagraph 2.1.1 .of
annex IIIthetechnical service responsible forverifying
theconformity ofproduction may ,with theconsent ofthe
manufacturer ,carry outtests oftypes I,IIandIIIon
vehicles which have "been driven less than 3.000 km.IfnY20 .

-7- XI/335/73-E
AHNEXII:ESSENTIAL CH^JUCTSRISTICS OPTEEENGINE AHDIl^ORELlTION
'CONCERI-IIITG TEECOIffiUCT OFTESTS
Item1.4shallread:
1.4Numberandarrangement ofcylinders : ................
Items3.2.1.3.1 .to3.2.1.3.5 »
Thetextontheright-hand sideofthepageshallread: ,
Curveoffueldeliveryplottedagainstairflow,andsettingsrequired
tokeeptothecurve(2). <•'-
AM8XII:TYPE-I TEST
Point4.1.4.shallread:
4.I.4..Acheckshallbemadetoverifythatrrfchesettingofthebrake
soobtainedisappropriate forotherintermediate states
betweenidlingandthemaximumspeedinthecycle;if
necessary ,anintermediate settingshallbeadopted.
5.3.shallread:
5.3."Useofthechoke.
5.3.1.Manually-operated choke.
Thechokeshallbecutoutassoonaspossible andintheory
beforeacceleration from0to$0km/h.ofthefirstcycle.
Ifitisnotpossibletofulfilthisrequirement thepointat
which'thechokeactually ceasestooperateshallbespecified .
Themethodofsettingthechokeshallbeasspecified bythe
manufacturers .
5.3.2.Automatic Choke.
Ifthevehicleisfittedwithanautomatic chokeitmustbe
driveninaccordance withthespecifications laiddownbythe
manufacturer concerning settingandkick-down following acold
start.Ifthekick-down pointisnotspecified itmustbe
13secondsaftertheenginehascommenced running .

-8- XI/335/73-E
6.2.1.Add(attheend):
Ifthedesignofthebaginletdoesnotensurecomplete
mixingofthegasesemittedduringthetest,thesegases
must "bemixedbeforeanalysise.g.,viaarecirculating pump.
Point7.1.•lastdefinition shallread:
PH:partialwatervapourpressure expressed inmillimétrés
(mercurygauge)
AUMEXTV-TypeIItest
Point1,2shouldread:
1.2.ThetypeIItestshouldbecarriedoutassoonaspossible
afterthefourthoperating cycleofthetype~Itest,with
theengineidlingandthechokenotinuse.■Immediately
beforeeachmeasurement ofthecarbonmonoxide content
otherthanthefirstalloperating cycleoftheTypeItest
shouldbeperformed asdescribed in1,1inAnnexIII.
Addthefollowing nev;point1.5:
1.5Regulating devicesforidling
1.5.1.Définition
WithinthemeaningofthisDirective ,thosepartswhioh
canbeusedtoaltertheidlingconditions oftheengine
andcanbeeasilyadjusted byanoperatorusingonlytools
asdescribed underpoint1.5.1.1.below.Inparticular ,
devicesforcalibrating fuelandairflowratesshallnot
bedeemedregulating devicesiftheiradjustment necessitates
theremovalofset-stopswhichnormallyprohibittheir
adjustment byanyonetrbherthanqualified personnel .
1.5.1.1.Toolswhichcanbeusedtoadjusttheidle-setting devices:
screwdriver (ordinaryorcross-headed ),spanners (ring,
openr-ended oradjustable ),pliers,AllenKeys.

-9- Xl/335/73-E
1.5.2.Determination ofmeasuring points,
1.5.2.1.Atfirstameasurement Bhould~bemadeatthevehiclesettings
usedforthetype--Itest.
1.5.2.2.Asufficient numberofcharacteristic positions shall "be
determined foreachcontinuously variablesettingdevice.
1.5.2.3.Themeasurement ofthecarbonmonoxide contentoftheexhaust
gasesmustbecarriedoutforallpossible positions of
thesettingdevices,butwithcontinuously-variable devices
onlyforthepositions definedunderpoint1.5.2.2.above.
1.5.2.4.Thetype-II .testshallbedeemed -satisfactory ifanyoneof
thefollowing conditions isfulfilled :
152.4.1.Noneofthevaluesmeasuredinaccordance 'withthe'requirements
of1.5.2.3.aboveexceedsthelimiting value:
1.5.2.4.2Themaximumcontentobtainedifoneofthesettingdevices
iscontinuously variedwhilethesettingoftheotherdevices
remainsconstant doesnotexceedthelimiting value,andthis
condition isfulfilled inrespectofthevariouscombinations
ofthesetting-device configurations apartfromthecontinuously -
variable device.
1.5.2.5.Thepossiblepositions of.thesetting-devices shallbelimited,
15.2.51 ontheonehand,bythegreaterofthetwofollowing values:
-thelowestcrankshaft speedwhichthe.enginecan
,achievewhileidling
-thecrankshaft idlingspeedrecommended bythemanufacturer
minus100r/p/m.
1.5.2.5.2 ontheotherhand,bythelowestofthethreefollowing
values:^
•thehighestcrankshaft speedwhichtheenginecanbe
madetoachieveviatheidle-setting devices ?
thecrankshaft idlingspeedrecommended bythe
manufacturer plus250r/p/m;
-thecrankshaft speedatwhichautomatic clutches engage.
1.5.2.6.Inaddition ,settingpositions whichareincompatible with
theproperfunctioning oftheenginemustnotbetakenas
measuring points.Inparticular ,whenanenginei3fitted
withseveralcarbureters allofthecarbureters mustbe
adjusted tothesanesetting.

-10- XI/335/73-E
AMEXVV'TYPE-III TEST
Addthefollowing newpoint5
5.Alternative testmethods.
5.1.Thevehicleshallliedeemedsatisfactory iftindereachofthe
measurement conditions definedin2.2itisshownthatthe
recirculating orventingsystemisabletorecycleallof
thecrank-case gaseswhichcould "beemittedtoatmosphere .
5.2.Therequirements of2and4.7aboveshallapplytothis
method.
5.3.Testing mothods
5.3.1.General method
5.3.1JTheapertures oftheengineshall "beleftintheoriginal
condition .
53J-.2Themeasurement ofthepressure insidethecrank-case shall
"bemadeatthedipstickaperture .Thepressureshallbe
measured withaninclined manometer .
5-3J.3Thevehicleshallbeconsidered satisfactory if,foreach
oftheconditions definedinpoint2.2.,thepressure measured
inthecrankcase isnothigherthantheatmospheric pressure
atthemomentofthemeasuring .
5.3.1.4If»foranyoftheconditions definedinpoint2.2,the
pressure measuredinthecrank-case ishigherthanthe
atmospheric pressure ,theadditional testdefinedinpoint
5.3.2.hereafter shallbecarriedoutatthemanufacturer 's
request.
5.3.1.5Forthetestaccording tothemethodspecified in5«3»1*"the
crank-case pressureshallbemeasuredtowithint1mmwater.

r -11- Xl/335/73-E
5.3.2.AdditionalTestMethod
5.3.2.1 Theapertures oftheengineshallbeleftintheoriginal
condition .
5.3.2.2 Aflexible "bagimpervious tocrank-case gasesandwitha
capacity ofabout5litresshallbeconnected tothedip
stickaperture .Thisbagshallbeemptybeforeevery
measurement .
5.3.2.3Beforeeverymeasurement thebagshallbestoppedup.It
shallbeconnected withthecrank-case forfiveminutes
foreachmeasurement condition specified inpoint2.2.
5.3.2.4 Thevehicleshallbeconsidered satisfactory ifnovisible
inflation ofthebagoccurred underanyoftheconditions
specified inpoint2.2.
5.3.3.Remarie
5.3.3.1If'■thedesignoftheengineissuohthatthetestcannotbe
performed according tothemethodsspecified inpoints5°3.1.
and5«3.2.,themeasurements shallbocarriedoutaccording
tothemethodspecified inpoint5«3.2.withthefollowing
modifications:
5*3.3.2Beforethetest,allapertures otherthanthatrerruiredfor
therecovery ofthegases,shallbestoppedup.
5.3.3.3 Thebagshallbeconnected toasuitabletake-off not
introducing anyadditional ?ossofpressure andbeing
installed ontherecycling circuitofthedevicedirectly
attheengineconnection aperture .