CELEX: 51974PC0207
Language: en
Date: 1974-02-22
Title: Proposal for a Council directive adapting to technical progress of the Council directive of 20 March 1970 on the approximation of the laws of the Member States relating to the measures to be taken against air pollution by gases from sparkignition engines of motor vehicles (70/220/EEC) (submitted to the Council by the Commission)

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COM (74) 207
Vol. 1974/0041
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 ---pagebreak--- COMMISSION OF THE EUROPEAN CQMMUMÏTES
                                                   COM(74)207 final
                                                   Drossels . 22 February 1974
                             Proposal for a Council directive
       adapting to technical progress of the Council directive of 20 March 1970
       on the approximation of the laws of the Member States relating to the
       measures to "be taken against air pollution by gases from sparkignition
                                  engines of motor vehicles
                                    (70/220/EEC )
                   ( submitted to the Council "by the Commission)
  C0M(74 ) 207 final
 ---pagebreak---                                       EXPLOITATION
 I.        GENERAL
          The application of the provisions of the Council directive
           of 20 March 1970 ( 70/220/EEC ) relating to "measures to "be
          taken against air pollution "by exhaust gases from sparlc
           ignition engines of motor vehicles" ( l ) has already led
          to an important reduction of emissions of carbon monoxide
          and unburnt hydrocarbons from these vehicles within the
          Community.      Meanwhile , in that which concerns the world
          situation regarding air pollution, this effect has , in some
          measure , been offset by the constant growth in the vehicle
          population.      This , together with the need for the protection
          of health and the environment , make it necessary to increase
          the severity of the provisions of this directive .
          During this time , the . findings of the Working Group of
          experts "Air Pollution due to motor vehicles - Technical
          Aspect s!l . have shown that the intervening technical progress
          made in the construction of engines allows for the further
         reduction, in the short term, of the admissible limits of
         emissions .      Basecl on these findings , the technical services
         responsible to the Commission have , formulated a proposal
         for a directive modifying the above mentioned directive ,
         •tfhich essentially, provides for a 20fo reduction in the limits
         relating to carbon monoxide , and a 15$ reduction in those
       , relating to unburnt hydrocarbons .        In addition , the
         ^regulations concerning the test relating to emissions of
      . carbon monoxide at idling speeds have been modified in
         the sense that the prescribed limit must be respected at
         all the possible settings of the carburettors .         Together ,
         these modifications will , when applied , represent a net/
         and important reduction in air pollution from motor vehicles
( 1 ) O.J. CE . Ho . L 76           of 6 Aprii 1970 p . 1 .
 ---pagebreak---                                      -2-
      and an important contribution to the improvement of the
      urban environment .
      Conforming to the provisions of Artiolcs 11 , 12 and 13 of
      the Council Directive of 5 February 1970 , concerning "the
      type-approval of motor vehicles and their trailers" ( 2 ),
      and to Article 5 of the Council directive of 1 torch 1970 ,
      concerning "the measures to be taken against air pollution
      by exhaust gases from spark ignition engines of motor vehicles"
      ( l ), the Commission asked for , on 10 October 1973 » the opinion
      of the " Motor Vehicles" Committee on the draft of the above
      mentioned directive .
     The technical content of this draft has been approved by the
     Committee , but , due to a difference of opinion as regards the
     date of application of the various provisions of Article 2 ,
     particularly that which concerns the modifications of the test
     relating to emissions at idling speeds , the Committee did not
     find the majority required to give a favourable opinion on the
     draft .    Since then, in accordance with the procedure laid down
     in Article 13 paragraph 3 ( b) of the above mentioned Council
     directive of 6 February 1970 ( 2 ), the Commission is required to
     submit to the Council , without delay, a proposal relating to      -
     the measures to be taken.
     Since consulting the Committee , there have been changes in
     the positions taken by the Governments of certain Member States .
     The Commission's Services , after having contacted the experts
     of these Governments , -examined the new situation. Because of
     the results thus obtained , the present draft envisages achieving
     the same operative date for the modified test relating to the
     emissions of carbon monoxide, at idling speeds , that is 1 October
     1976 . The other provisions proposed in the draft remain unchanged.
(1)       O.J. CE No . L 76   of 6 April , 1970 , p.l .
( 2)      O.J. CE No . L 42   of 23 February 1970 p . l .
 ---pagebreak---                                     -3~
    The first Article of this draft directive allows the replacement
    of the text of certain points of the Annexes of the Directive
    of 20 Iforch 1970 ( 70/220/SEC ) by new requirements v;hich are shown
    in the Annex of the amending directive .     Article 2 fixes the
    due dates for adoption , publication, and application of the
    new regulations .
II . CONCLUSIONS AIT) PROPOSAIS .
    The above having "been taken into account , it is proposed by
    the Commission to approve this draft proposal for a directive
    and to submit it to the Council in accordance with the procedure
    laid down in Article 13 paragraph 3 (b) of the Council directive
    of 5 February 1970 concerning "type-approval of motor vehicles
    and their trailers" ( l ).
(1)   Ο.σ . <Τ3 . ΙΤο . I, 76  of 6 April 1970 , p.l .
 ---pagebreak---                                      -4-
 THE COMMISSION OP THE EUROPEA2T COMMUNITIES ,
 Having regard "to the Treaty establishing the European Economic .
 Community-
Having regard to the proposal from the Commission ;
Having regard to the Council Directive of 5 February 1970 on the
approximation of the laws of the Member States relating to the type–
approval of motor vehicles and their trailers ( 70/150/EHC ) , amended
by the Act annexed to the Treaty of Accession to the EEC and EAEC
signed by the new Members in Brussels on 22 January 1972^, and in
particular to Articles 11 , 12 and 13 thereof ;
Having regard to the Council Directive of 6 February 1970 on the
approximation of the laws of the Member States relating to the measures
to be taken against air pollution .by gases from spark-ignition engines
of motor vehicles ( 70/220/EEC )\ amended by the Act annexed to the
Treaty of Accession to the EEC and EAEC signed by the new Member
States in Brussels on 22 January 1972^, and in particular to Article
3 thereof ;
Whereas the protection of the population against , increasing
atmospheric pollution , particularly in towns , necessitates active
measures for reducing the emissions of polluting gases produced by
spark ignition engines intended for the propulsion' of vehicles ,
and as such a reduction of the admissible limits of emissions is
made possible by the progress made in the construction of these
engines *
   OJ EC No . L 76 , 20 March 1970 , p.l .
  OJ EC No . L 42 , 23 February 1970 , p.l .
  OJ EC No . L 7.3 , 27 March 1972 , pp . 9 , 10 , 115 and 157-
 ---pagebreak---                                     -5-
-    whereas m the future these engines shall he equipped by
     carburettors which allow to respect the specified limits
     concerning the emissions during operation at idling speed
     in any position of the adjustment components at the disposal
     of the user ;
-   Whereas the experience acquired by applying the present
     specifications of the directive' 70/220/E5C of the Council
     of 20 March 1970 has shown that it is convenient to modify
    these specifications in order to facilitate the execution
    of the foreseen tests by the approved organisations ;
-   Whereas it is also convenient to make certain modifications
    simplifying the administrative procedure of the type-approval ■
    of a vehicle concerning the emissions of pollutants , especially
    in order, to allow the extension of the type-approval to vehicle
    types which differ from the original approved type by their
    weight and/or their gear ratios ;
- Whereas the Commission submitted on 10 October 1973 } a proposal
    for amendment for the opinion of the Committee on the
    adaption to technical progress of the directives aimed at the
    removal of technical barriers to trade in the motor vehicle
    sector, and which opinion was not favourable f in accordance
    with the procedure laid down in Article 13 paragraph 3 ( b) of
    the Council direction of 6 February 1970 concerning type-
    approval of motor vehicles and their trailers ( l ), the
    Commission has proposed to the Council the measures to be
    taken ;                                                       '
(l)     OJ E.C. Ho . L J6 , 20 March 1970 , p.l .
 ---pagebreak---                                      -6-
HAS ADOPTED THIS DIRECTIVE :
                                  Article 1
       The Jxxm.ex.ea I to V to the Council Directive of 20 March 1970
( 70/220/CEE) are modified according to the Annex to the present .
Directive .
                                 Article 2
1.     With effect from 1 January 1975 "the Member States shall not
       on grounds relating to the air pollution by gases from positive
       ignition engine(s ) for its/their propulsion:
       -    refuse EEC type approval , the delivery of the documents
            referred to in Article 10 ( l ), last sub-section, of the
            Council Directive of 6 February 1970 ( 70/156/EEC ) or the
            national type approval of a type of motor vehicle ;
       -    not prohibit .the entry into service of the vehicles ;
       if the emissions of polluting gases of this type of vehicle
       oi* of these vehicles comply with the provisions of the Council
       Directive of 20 March 1970 ( 70/220/EEC) as hereby amended,
2.     From 1 October 1975 onwards the Ifember States ;
       -    shall no longer deliver the document envisaged in Article
            10 ( l ), last sub-section, of the Council Directive of
            6 February 1970 ( 70/153/EEC ) for a type of vehicle of
            which the emission of polluting gases does not comply with
            the provision of the Council Directive of 20 March' 1970
            ( 70/220/EEC) as hereby amended, in that which concerns
            Annexes I ( with the exception of point 3.2.1.2.2 .), II ,
            IV point 1.2 and V ;.
       -    may refuse the national type-approval of a type of vehicle
            of which the emission of polluting gases does not comply
            with the provisions of the Council Directive of 20 Iferch
            1970 ( 70/220/EEC ) as amended hereby, in that which concerns
            the Annexes I (with the exception of point 3.2.1.2.2 .),
            II , IV point 1.2 and V.
 ---pagebreak---                                    -7-
   -    shall prohibit the entry into service of vehicles of which
        the emissions of polluting gas do not conform to the
        regulations of the Council directive of 20 March 1970
        ( 70/220/EEC ) as amended hereby, in that which concerns
       Annexes I (with the exception of poifrfct3.2.1.2.2 .), H ,
        IV point 1.2 and V.
3.      Prom 1 October 1976 onwards the Member States :
   - shall no longer deliver the document envisaged in Article 10 ( l ),
        last sub-section, of the Council Directive of 6 February 1970
        ( 70/156/KEC ) for a type of vehicle of which the emission of
       polluting gases docs not comply with the provision of the Council
       Directive of 20 March 1970 ( 70/220/EEC) as hereby amended, in
       that which concerns Annexes I , point 3.2.1.2.2 . and IV point 1.5 ;
   -   may refuse the national type~approval of a type of vehicle
       of which the emission of polluting gases does not comply with
       the provisions of the Council Directive of 20 ferch 1970
       ( 70/220/EEC ) as amended hereby, in that which concerns
     . Annexes I point 3.2.1.2.2 . and IV point 1.5 ;
   -   shall prohibit the entry into service of vehicles of which
       the emissions of polluting gas do not Conform to the
       regulations of the Council directive of 20 March 1970
       ( 70/220/EEC ) as amended hereby, in that which concerns
       Annexes I point 3.2.1.2.2 . and IV point 1.5 .
4.     The Member States shall adopt and publish the provisions
       necessary in order to comply with this Directive before
       1. October 1974 and shall forthwith inform the Commission
       thereof .
                                  Article 3 ■
This Directive is addressed to all the Member States . <
 ---pagebreak---                                                                              Xl/335/73 - E
                                             Λ 3Τ Η Ε Χ
                Modifications of the annexes of the Council Directive
                         70/220/EEC of              20 March 1970 ■
                                              AlffiEX I
                           IEPIIUTIONS , APPLICATION POR EEC-APPROVAL ,
                                       DESCRIPTION OF TESTS
Point 3.2,1.1^40 shall read :
3.2.1.1.4 . Subject to the provisions of paragraph 3.2.1.1.5 . "below , the
                   test shall be repeated three times .             In each test , the mass
                    of the carbon monoxide and the mass of the hydrocarbons
                    obtained must be less , for a vehicle of given reference weight ,
                   than the amounts shown in the table below .
                   Reference weight              Mass of                       Ib,sc of
                         ( rw)            • 'carbon monoxide              hydrocarbons gramme s
                     kilogrammes         i grammes , per test                  per test
                                         ! : 5 .::-,                   I
                                                                       1
                                                                           ■'     L2         –
                            rw / 750                  80
                     750<rv;i850                      87                          7.1
                     850 <. rw .< 1020                94                          7.4
                   1020 s. rw << 1250                107             1            8.0
                   1250 < rw 4 1470                  122                          8,6
                   1470< rw4l700 ' !              .            ... . ^            9.2
                   1700 < rw <$1930                  149 .. .              :    , 9.7
                   1930 < rw 42150                   162                       , 10.3
               . 2150<                           .. 175
                                                                        |
                                                                        »
                                                                                 10.9
3 . 2 . 1.1 . 4.1 . Nevertheless , . for each of the pollutants referred to in the
                   foregoing point , one of the three results obtained may exceed
                 . by not more than 10 per cent the limit prescribed in that ..
                   point for the vehicle , concerned , provided the arithmetical
                   mean of the three results is below the prescribed limit .
                   In cases where the prescribed limits are exceeded for more
                   than one pollutant , it shall be immaterial whether this
                   occurs in the same test or in different tests .
 ---pagebreak---                                                .. 2 -                  viI/ 335/73 - E
 After this point , the following new point 3.2.1.1.5 . shall "be added :
 3.2.1.1.5 .            The number of tests prescribed in point 3.2.1.1.4 . shall
                        he reduced in the conditions hereinafter defined, where
                        V^ is the result of the first test and Vg the result of the
                        second test for each of the pollutants referred to in point
                        3.2.1.1.4 .
 3 . 2 . 1.1 . 5.1 . Only one test shall he made if , for "both the pollutants
                        concerned,    K. 0.70 L.
 3 . 2 , 1.1 . 5 . 2 . Only two tests shall "be made if , for "both the pollutants
                        concerned, V^^;: O. 85 L "but . for at least one of the pollutants
                             0.70 L.  In addition , for each of the pollutants
                        concerned ,   must satisfy the requirements that V^+V^
                         < 1.70 L and V2 < L ,
.At point 3 . 2 . 1.2 . 2 . add.. the following sentence :
 3.2.1.2.2 .            This requirement, shall he verified in the manner e:q?lained
                        in annex IV, in all conditions resulting from the adjustment
                        of the various adjustment. components available to users .
 After point 3.2.1.3.3 . add the following new point 4:-r -                     J
<4 .                    EXTENSION OP APPROVAL                                  ;
                                                                               i
 4.1                    Vehicle types of different reference weights
                        Approval of a vehicle type may under the following conditions
                    - - be extended to vehicle type5 which . differ from the type
                        approved only in respect of their reference weight .
 4.1.1 .                Approval may bo ezctended to vehicle types of a reference
                  •     weight requiring merely the use of the next higher or next
                        lower equivalent inertia . •
 ---pagebreak---                                - 3 -                 XI/ 3 3 5/ 7 3 - E
   If the reference weight of the vehicle type for which
   extension of the approval is requested requires the use of
   a flywheel of equivalent' inertia' higher than that used for
   the vehicle type already approved , extension of the approval
   shall "be granted . '  ''           ' ■ •
   If the reference weight of the vehicle type for which
   extension of the approval is requested requires the use of
   a flywheel of equivalent inertia lower than that used for
  the vehicle type already approved , extension of the approval
   shall "be granted if the masses of the pollutants obtained
   from the vehicle already approved are within the limits
  prescribed for the vehicle for which extension of the
  approval is requested .
  Vehicle types with different overall gear ratios
  Approval granted to a vehicle type may under the following
  conditions "be extended to vehicle types differing from the
  type approved only in respect . of their overall transmission
  ratios :            .
  For each transmission ratios used in the type I tost ,
  it shall be necessary to determine the proportion E =->./' 2 -• y 1 ,
  where v ^ and -v; g are respectively the speed at                "V ^
  1000 r.p.m. of the engine of the vehicle " type approved
  and the speed of the vehicle type for which extension of the
  approval is requested .
  If for each gear ratio E ^ 5 per cent , the extension shall be
  granted without repeating the type I tests .
  If for at least one gear ratio E       5 per cent and if for each
  gear ratio E      10 per cent , the type I tests shall be
. repeated but may be performed in a laboratory chosen by the
  manufacturer , subject to the approval of the Administration
  granting approval .    The reports of the tests shall be sent
  to the recognized laboratory .
 ---pagebreak---                                                            Xl/335/73 - E
4.3         Vehicle "times of different reference weights and different
            overn,ll transmission ratios
            Approval granted to a vehicle nay be extended to vehicle
            types differing from the approved type only in respect of their
            reference weights and their overall transmission ratios ,
            provided that all the conditions prescribed in ;pQ.intiS ; "a ::
            4.1 to 4.2 above are fulfilled .
4.4 .       Note
            When a vehicle type has been approved in accordance with the
            provisions of    points    4,1 . "to 4.3 . above , such approval
            may not be extended to other vehicle types .
Haplpcenthictioint 3.2.2 , by the following new point 5 J
5.          COETORMITY OF PRODUCTION
5.1.'       As a general rule , conformity of production with regard to
            the limitation of the emissions of gaseous pollutants by the
            engine is verified on the basis of the description given
            in the communication according to Annex VII and if necessary ,
            by means of all or some 'of the tests of typos I , II or III
            referred to in point 3.2 .
5.1.1 .     For verifying the conformity of the vehicle in a type--I test ,
            the following procédure is adopted :
5*1.1.1 .   A vehicle is taken from the series and subjected to the t'est
            described in paragraph 3.2.1.1 .     However , the limit values
            shown in paragraph 3.2.1.1.4 . are replaced by the following
            limit values :
 ---pagebreak---                                           -5-                       XI/335/73 - E
   Reference weight        !         Macs of                        Ife,ss of
       ( rw)                   . carton jnçnoxide ,    .         hydrocarbons
    kilogrammes                  grammes psr test              grammes per tost
                                        vv ; y               ■   ••      l2 -    ;
         rw 4 750           r             9^                             8.8
   750<rw 4.850                          105                             9.3
   850 < rw 4-1020                       112                             9.6
! 1020 <rw ^1250          |              129                           10.4
  125 O^rw 4147O                         145                           11.1
  BJ70 < rw 41700                   • . 162              !             11.9
   1700<rw < 1930 :       j              178                           12.6
   1930 /rw 4 2150        1              195                           13.3
   2150<(rw                              211
                                                          1
                                                           I         . 14.1
   5.1.1.2 .    If the vehicle taken from the series docs not satisfy the
                requirements of paragraph 5«l*l»l»j the manufacturer may ask
                for measurements to be performed on a sample of vehicles
                taken from the series, and including the vehicle originally
                taken .  The manufacturer shall determine the size n of the
                sample .  Vehicles other than the vehicle originally taken
                shall be subjected to a single typo I test .             The result to be
                taken into consideration for the vehicle taken originally is
                the arithmetical mean of the results of the three type • I tests
                carried out on the vehicles. The arithmetical ooan Z of the result
                obtained with the sample and the standard deviation S ( l )
                of the sample shall then be determined for each gaseous
                pollutant . The production of the series shall then be deemed
                to conform if the following condition is met :
                                     2: + k<> S »
                wheres
                L * the limit value laid dovm in paragraph 5»1»1»1 » ?or each
                    gaseous pollutant considered ; and
                k = a statistical factor dependent on n and given in the
                    following table :
   cd s2 -                    , where x is any one of the individual results
                   n--l
                                 obtained with the sample n .
 ---pagebreak---                                     -6-                        XI/335/73 - E
Q         2   3
                   L±J!       \
                                  5      6 i
                                          ,  !
                                                   T~ ,
                                                    ,
                                                             8       9       10
 m[ 0.973 |j 0.613  0.452     I 0.421  0.376 i 0.342]roTTTT | 0.2$6 |I     0.272
LiJLiLJΓ 12 1        13     5    14 | 15      L 16          17    nn –m
I k   0.265  0.253  0.2â3 <!    0.233T 0.224     0.216    7)7210 OoT ÔTT^
»
                                               .      0.860
            If n Y 20 .                        k =    .......
  5.1.2 .    In a type XI or "type III test carried out on a vehicle taken
             from the series, the conditions laid down in points 3*2 . 1.2 . 2 .
             and 3.2.1.3.2 . shall "be complied with.
  5.1.3 .    Notwithstanding the provisions of paragraph 2.1.1 . of
             annex III the technical service responsible for verifying
             the conformity of production may, with the consent of the
             manufacturer , carry out tests of types I , II and III on
             vehicles which have "been driven less than 3.000 km.
 ---pagebreak---                                              -7-                 XI/ 335/ 73 - E
AHNEX II : ESSENTIAL CH^JUCTSRISTICS OP TEE ENGINE AHD Il^ORELlTION
              '  CONCERI-IIITG TEE COIffiUCT OF TESTS
Item 1.4 shall read :
1 .4      Number and arrangement of cylinders :                ................
Items 3.2.1.3.1 . to 3.2.1.3.5 »
The text on the right-hand side of the page shall read :                         ,
Curve of fuel delivery plotted against air flow , and settings required
to keep to the curve ( 2 ).                                         <•'-
AM8X II : TYPE-I TEST
Point 4.1.4 . shall read :
4 .I . 4 . . A check shall be made to verify that rrfche setting of the brake
             so obtained is appropriate for other intermediate states
             between idling and the maximum speed in the cycle ;         if
             necessary , an intermediate setting shall be adopted .
5.3 . shall read :
5.3 .     " Use of the choke .
5.3.1 .      Manually-operated choke .
             The choke shall be cut out as soon as possible and in theory
             before acceleration from 0 to $0 km/h. of the first cycle .
             If it is not possible to fulfil this requirement the point at
             which' the choke actually ceases to operate shall be specified .
             The method of setting the choke shall be as specified by the
             manufacturers .
5.3.2 .      Automatic Choke .
             If the vehicle is fitted with an automatic choke it must be
             driven in accordance with the specifications laid down by the
             manufacturer concerning setting and kick-down following a cold
             start .  If the kick-down point is not specified it must be
             13 seconds after the engine has commenced running .
 ---pagebreak---                                       -8-                      XI/335/73 - E
6.2.1 . Add (at the end) :
          If the design of the bag inlet does not ensure complete
          mixing of the gases emitted during the test , these gases
          must "be mixed before analysis e.g. , via a recirculating pump .
Point 7.1 . •   last definition shall read :
PH :      partial water vapour pressure expressed in millimétrés
          ( mercury gauge )
AUMEX TV - Type II test
Point 1,2 should read :
1.2 .     The type II test should be carried out as soon as possible
          after the fourth operating cycle of the type~I test , with
          the engine idling and the choke not in use . ■ Immediately
          before each measurement of the carbon monoxide content
          other than the first all operating cycle of the Type I test
          should be performed as described in 1,1 in Annex III .
Add the following nev; point 1.5 :
1.5       Regulating devices for idling
1.5.1 .   Définition
          Within the meaning of this Directive , those parts whioh
          can be used to alter the idling conditions of the engine
          and can be easily adjusted by an operator using only tools
          as described under point 1 . 5 . 1.1 . below . In particular ,
          devices for calibrating fuel and air flow rates shall not
          be deemed regulating devices if their adjustment necessitates
          the removal of set-st ops which normally prohibit their
          adjustment by anyone trbher than qualified personnel .
1.5.1.1 . Tools which can be used to adjust the idle-setting devices :
          screwdriver ( ordinary or cross-headed), spanners ( ring,
          openr-ended or adjustable ), pliers , Allen Keys .
 ---pagebreak---                                           -9-                    Xl/335/73 - E
1.5.2 .       Determination of measuring points ,
1.5 . 2.1 . At first a measurement Bhould~ be made at the vehicle settings
              used for the type--I test .
1.5 . 2 . 2 . A sufficient number of characteristic positions shall "be
              determined for each continuously variable setting device .
1.5.2 . 3 . The measurement of the carbon monoxide content of the exhaust
              gases must be carried out for all possible positions of
              the setting devices , but with continuously-variable devices
              only for the positions defined under point 1.5.2.2 . above .
1.5 . 2 . 4 . The type-II. test shall be deemed -satisfactory if any one of
              the following conditions is fulfilled :
152.4.1 . None of the values measured in accordance ' with the' requirements
              of 1.5.2.3 . above exceeds the limiting value :
1.5.2.4.2 The maximum content obtained if one of the setting devices
              is continuously varied while the setting of the other devices
              remains constant does not exceed the limiting value , and this
              condition is fulfilled in respect of the various combinations
              of the setting-device configurations apart from the continuously-
             variable device .
1.5.2 . 5 . The possible positions of. the setting-devices shall be limited ,
15.2.51 on the one hand , by the greater of the two following values :
             -       the lowest crankshaft speed which the . engine can
                   , achieve while idling
             -       the crankshaft idling speed recommended by the manufacturer
                     minus 100 r/p/m.
1.5.2.5.2 on the other hand , by the lowest of the three following
               values :   ^
                •    the highest crankshaft speed which the engine can be
                     made to achieve via the idle-setting devices ?
                     the crankshaft idling speed recommended by the
                     manufacturer plus 250 r/p/m ;
             -       the crankshaft speed at which automatic clutches engage .
1.5.2.6 . In addition, setting positions which are incompatible with
             the proper functioning of the engine must not be taken as
              measuring points .   In particular , when an engine i3 fitted
              with several carbureters all of the carbureters must be
              adjusted to the sane setting .
 ---pagebreak---                                     -10-                     XI/335/73 - E
                          AMEX V V'TYPE-III TEST
Add the following new point 5
5.       Alternative test methods .
5.1 .   The vehicle shall lie deemed satisfactory if tinder each of the
         measurement conditions defined in 2.2 it is shown that the
         recirculating or venting system is able to recycle all of
        the crank-case gases which could "be emitted to atmosphere .
5.2 .   The requirements of 2 and 4.7 above shall apply to this
         method .
5.3 .   Testing mothods
5.3.1 . General method
5.3.1 J The apertures of the engine shall "be left in the original
        condition .
53J-.2 The measurement of the pressure inside the crank-case shall
        "be made at the dip stick aperture .  The pressure shall be
        measured with an inclined manometer .
5-3J.3 The vehicle shall be considered satisfactory if , for each
        of the conditions defined in point 2.2 ., the pressure measured
         in the crankcase is not higher than the atmospheric pressure
        at the moment of the measuring .
5.3.1.4 If » for any of the conditions defined in point 2.2 , the
        pressure measured in the crank-case is higher than the
        atmospheric pressure , the additional test defined in point
        5.3.2 . hereafter shall be carried out at the manufacturer's
        request .
5.3.1.5 For the test according to the method specified in 5«3»1 * "the
        crank-case pressure shall be measured to within t 1 mm water.
 ---pagebreak--- r                                    -11-                   Xl/335/73 - E
  5.3.2 .  Addit ional Test Method
  5.3.2.1 The apertures of the engine shall be left in the original
           condition .
  5.3.2.2 A flexible "bag impervious to crank-case gases and with a
           capacity of about 5 litres shall be connected to the dip
           stick aperture .  This bag shall be empty before every
          measurement .
  5.3.2.3 Before every measurement the bag shall be stopped up .    It
          shall be connected with the crank-case for five minutes
          for each measurement condition specified in point 2.2 .
  5.3.2.4 The vehicle shall be considered satisfactory if no visible
          inflation of the bag occurred under any of the conditions
          specified in point 2.2 .
  5.3.3 . Remarie
  5.3.3.1 If '■the design of the engine is suoh that the test cannot be
          performed according to the methods specified in points 5°3.1 .
          and 5«3.2 ., the measurements shall bo carried out according
          to the method specified in point 5«3.2 . with the following
          modif icat ions :
  5*3.3.2 Before the test , all apertures other than that rerruired for
          the recovery of the gases , shall be stopped up .
  5.3.3.3 The bag shall be connected to a suitable take-off not
          introducing any additional ? oss of pressure and being
          installed on the recycling circuit of the device directly
          at the engine connection aperture .