1980L1268 — EN — 31.12.1999 — 003.001 — 1
This document is meant purely as a documentation tool and the institutions do not assume any liability for its contents
►B ►M2 COUNCILDIRECTIVE
of16December 1980
relating tothecarbondioxideemissionsandthefuelconsumptionofmotorvehicles
(80/1268/EEC) ◄
(OJ L 375, 31.12.1980, p. 36)
Amended by:
Official Journal
No page date
►M1Commission Directive 89/491/EEC of 17 July 1989 L 238 43 15.8.1989
►M2Commission Directive 93/116/EC of 17 December 1993 L 329 39 30.12.1993
►M3Commission Directive 1999/100/EC of 15 December 1999 L 334 36 28.12.1999
Corrected by:
►C1Corrigendum, OJ L 42, 15.2.1994, p. 27 (93/116/EC)
►C2Corrigendum, OJ L 163, 4.7.2000, p. 38 (1999/100/EC)
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COUNCILDIRECTIVE
of16December 1980
relating to the carbon dioxide emissions and the fuel consumption
ofmotorvehicles
(80/1268/EEC)
THE COUNCIL OF THE EUROPEAN COMMUNITIES,
Having regard to the Treaty establishing the European Economic
Community, and in particular Article 100 thereof,
Having regard to the proposal from the Commission(1),
Having regard to the opinion of the European Parliament(2),
Having regard to the opinion of the Economic and Social
Committee(3),
Whereas the technical requirements which motor vehicles must satisfy
pursuant to certain national laws relate inter alia to the method of
measuring fuel consumption which must be used to indicate the fuelconsumption of a vehicle type;
Whereas those requirements differ from one Member State to another;
whereas this results in technical barriers to trade which must be elimi-nated by all Member States adopting the same requirements either inaddition to or in place of their existing rules, in order in particular toallow the EEC type-approval procedure which was the subject of
Council Directive 70/156/EEC of 6 February 1970 on the approxima-
tion of the laws of the Member States relating to the type-approval ofmotor vehicles and their trailers(
4), as last amended by Directive 80/
1267/EEC(5), to be introduced in respect of eachtype of veh icle;
Whereas it is of paramount importance to establish a method of
measuring fuel consumption by motor vehicles for inclusion in
Community requirements;
Whereas a Community method of measuring fuel consumption is also
necessary to ensure, in particular, that customers and users are supplied
withobjective and precise information;
Whereas the requirements of this Directive apply only to motor vehi-
cles in international motor vehicle classification category M1as set
out in Directive 70/156/EEC; whereas a method of measuring the fuel
consumption of the other categories of motor vehicles will be estab-
lished as soon as certain technical difficulties can be resolved,
HAS ADOPTED THIS DIRECTIVE:
Article 1
For the purpose of this Directive, ‘vehicle’ means any motor vehicle
intended for use on the road, with or without bodywork, having at leastfour wheels and a maximum design speed exceeeding 25 km/h, withthe exception of vehicles which run on rails and of agricultural tractorsand machinery.1980L1268 — EN — 31.12.1999 — 003.001 — 2
(1) OJ No C 104, 28. 4. 1980, p. 1.
(2) OJ No C 265, 13. 10. 1980, p. 76.
(3) OJ No C 182, 21. 7. 1980, p. 3.
(4) OJ No L 42, 23. 2. 1970, p. 1.
(5) See page 34 of this Official Journal.▼M2
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Article 2
No Member State may refuse to grant EC type-approval or national
type-approval in respect of a vehicle, or refuse or prohibit the sale,
registration, entry into service or use of a vehicle, on grounds relating
to its carbon dioxide emissions or its fuel consumption if the emissionand consumption figures have been determined in accordance withAnnexes I and II and are set out in a document given to the vehicleowner at the time of purchase in the manner and form decided byeachMember State.
Article 3
Any amendments necessary for adapting the requirements of the
Annexes to take account of technical progress shall be adopted in
accordance withth e procedure laid down in Article 13 of Directive70/156/EEC.
Article 4
1. Member States shall bring into force the provisions necessary in
order to comply with this Directive within 18 months of its notifica-tion. They shall forthwith inform the Commission thereof.
2. Member States shall ensure that the texts of the main provisions
of national law which they adopt in the field covered by this Directive
are communicated to the Commission.
Article 5
This Directive is addressed to the Member States.1980L1268 — EN — 31.12.1999 — 003.001 — 3
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ANNEX I
DETERMINATIONOFCO2EMISSIONSANDFUELCONSUMPTION
1. SCOPE
This Directive applies to the carbon dioxide (CO2) emissions and
the fuel consumption of all motor vehicles of category M1.
2. APPLICATION FOR EC TYPE-APPROVAL
2.1. The application for EC type-approval pursuant to Article 3 (4) of
Directive 70/156/EEC for a vehicle type with regard to CO2emis-
sions and fuel consumption shall be submitted by the manufacturer.
2.2. A model for the information document is given in Annex II to
Directive 70/220/EEC. When already available, the type-approval
number will also be reported. When appropriate, copies of other
type-approvals withth e relevant data are provided to enable exten-
sion of approvals in accordance with point 11. At the request of the
technical service in charge of the tests or the manufacturer, comple-mentary technical information could be considered for specific
vehicles which are particularly fuel efficient.
2.3. For the test described in point 6 of this Annex, a vehicle representa-
tive of the vehicle type to be approved will be submitted when the
technical service responsible for the type-approval tests carries out
the tests itself. During the test, the technical service will check that
this vehicle conforms to the limit values applicable to that type, as
described in Directive 70/220/EEC, as modified according to its last
amendment.
3. GRANTING OF EC TYPE-APPROVAL
3.1. If the relevant requirements are satisfied, EC type-approval pursuant
to Article 4 (3) of Directive 70/156/EEC shall be granted.
3.2. A model for the EC type-approval certificate is given in Annex II.
3.3. An approval number in accordance withAnnex VII to Directive 70/
156/EEC shall be assigned to each vehicle type approved. The same
Member State shall not assign the same number to another vehicle
type.
4. GENERAL REQUIREMENTS
4.1. The CO
2emissions are measured during the test cycle simulating
the urban and extra-urban driving patterns as described in Appendix
1 of Annex III to Directive 70/220/EEC, as last amended.
4.2. The results of the test must be expressed as carbon dioxide emis-
sions in g/km rounded to the nearest whole number.
4.3. Fuel consumptions are calculated according to point 7 by the carbon
balance method using the measured emissions of CO2and the other
carbon related emissions (CO and HC). The results will be rounded
to the first decimal place.
4.4.Testfuel
4.4.1. Petrol and diesel vehicles
The appropriate reference fuels as defined in Annex IX to Directive
70/220/EEC, as last amended, must be used for testing.
4.4.2. LPG and NG-fuelled vehicles
For LPG and NG, that fuel must be used which is chosen by the
manufacturer for the measurement of the net power in accordance
with Annex I to Directive 80/1269/EEC. The chosen fuel shall be
specified in the communication document as defined in Annex II.1980L1268 — EN — 31.12.1999 — 003.001 — 4
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4.4.3. For the purpose of calculation mentioned in 4.3, the following fuel
characteristics will be used:
(a) density: measured on the test fuel according to ISO 3675 or an
equivalent method; for petrol and diesel the measured density at
15 ºC will be used; for LPG and NG, a reference density will be
used, as follows:
0,538 kg/l for LPG
0,654 kg/m3for NG(1)
(b) hydrogen-carbon ratio: fixed values will be used, which are:
1,85 for petrol
1,86 for diesel
2,525 for LPG4,00 for NG
2,93 for NG (NMHC).
5. TEST CONDITIONS
5.1.Testvehicle
5.1.1. The vehicle must be presented in good mechanical condition. It
must have been run in and driven at least 3 000 kilometres, but
less than 15000 kilometres, before the test.
5.1.2. The settings of the engine and of the vehicle controls must be those
prescribed by the manufacturer. This requirement also applies, in
particular to the idle settings, to the cold start device and to the
exhaust gas pollutant emission control system.
5.1.3. The laboratory may check that vehicle performance is as specified
by the manufacturer and that it is possible to use it in normal
driving conditions, particularly cold and hot start.
5.1.4. Before the test, the vehicle must be stored in a room where the
temperature remains between 293 and 303 K (20 and 30 ºC). This
conditioning period will last at least six hours and to a point where
the temperature of the engine lube oil and the engine coolant are
within ± 2 K of the room temperature. At the request of the manu-
facturer, the test may be conducted within a maximum of 30 hours
after the vehicle has been used at normal temperature.
At the manufacturer's request, positive ignition engined vehicles
may be preconditioned according to the procedure prescribed initem 5.2.1 of Annex VI to Directive 70/220/EEC, as last amended.
Compression ignition engined vehicles may be preconditioned
according to the procedure described in item 5.3 of Annex III to
the same Directive.
5.1.5. Only the equipment necessary for the functioning of the vehicle
during the test shall be in operation. If there is a manually
controlled device on the carburettor inlet for air heating, it must be
in the ‘summer’ position. In general, the auxiliary equipment
required for the normal running of the vehicle must be in operation.
5.1.6. If the radiator fan is temperature controlled, it must be operating as
it would normally on the vehicle. The passenger compartment
heating system must not be operating, nor must the air conditioning
system, although its compressor must be operating normally.
5.1.7. If a pressure charging device is fitted, it must be operating as it
would normally.
5.2.Lubricants
All lubricants must be those recommended by the manufacturer of
the vehicle and must be indicated on the test report.1980L1268 — EN — 31.12.1999 — 003.001 — 5
(1) This is the mean value of the G20 and G23 reference fuels at 15 ºC.▼M2
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5.3.Tyres
The tyres must be of one of the types specified as original equip-
ment by the vehicle manufacturer, inflated to the pressure
recommended for the test load and speeds (adjusted, where neces-
sary, for test-bed operation under test conditions). The pressures
used must be indicated in the test report.
6. MEASUREMENT OF CO2AND CARBON-RELATED EMIS-
SIONS
6.1.Testcycle
The test cycle is described in Appendix 1 of Annex III to Directive
70/220/EEC, as last amended, including bothPart I (urban driving)
and Part II (extra-urban driving). All driving prescriptions contained
in this Appendix will be applied for the CO2measurement.
6.2.Definition
6.2.1. Reference mass
Mass of the vehicle in running order less the uniform mass of the
driver of 75 kg and increased by a uniform mass of 100 kg.
6.3.Dynamometeradjustments
6.3.1. The load and inertia adjustments of the dynamometer are deter-
mined as defined in Annex III to Directive 70/220/EEC, as last
amended.
6.4.Calculationofemissions
6.4.1. General provisions
6.4.1.1. Emissions of gaseous pollutants are calculated by means of the
following equation:
Mi¼Vmix/C1Qi/C1Ci/C110/C06
d(1)
where:
Mi= mass emission of the pollutant i in grams per kilometre;
Vmix= volume of the diluted exhaust gas expressed in litres per
test and corrected to standard conditions (273,2 K and
101,33 kPa);
Qi= density of the pollutant i in grams per litre at normal
temperature and pressure (273,2 K and 101,33 kPa);
Ci= concentration of the pollutant i in the diluted exhaust gas
expressed in ppm and corrected by the amount of the
pollutant i contained in the dilution air. If Ciis expressed
in % volume, 10−6factor is replaced by 10−2;
d = driven distance during the operating cycle in km.
6.4.1.2. Volume determination6.4.1.2.1. Calculation of the volume when a variable dilution device with
constant flow control by orifice or venturi is used. Record continu-
ously the parameters showing the volumetric flow, and calculate the
total volume for the duration of the test.1980L1268 — EN — 31.12.1999 — 003.001 — 6
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6.4.1.2.2. Calculation of volume when a positive displacement pump is used.
The volume of diluted exhaust gas in systems comprising a positive
displacement pump is calculated withth e following formula:
V¼Vo/C1N
where:
V = volume of the diluted exhaust gas expressed in litres per test
(prior to correction);
Vo= volume of gas delivered by the positive displacement pump
on testing conditions in litres per revolution;
N = number of revolutions per test.
6.4.1.2.3. Correction of the diluted exhaust-gas volume to standard conditions.
The diluted exhaust-gas volume is corrected by means of the
following formula:
Vmix¼V/C1K1/C1Pp
Tp(2)
in which:
K1¼273 ;2
101 ;33¼2;6961 K /C1kPa/C01/C0/C1
(3)
where:
Pp= absolute pressure at the inlet to the positive displacement
pump in kPa;
Tp= average temperature of the diluted exhaust gas entering the
positive displacement pump during the test (K).
6.4.1.3. Calculation of the corrected concentration of pollutants in the
sampling bag
Ci¼Ce/C0Cd1/C01
DF/C18/C19
(4)
where:
Ci= concentration of the pollutant i in the diluted exhaust gas,
expressed in ppm or % volume and corrected by the amount
of i contained in the dilution air;
Ce= measured concentration of pollutant i in the diluted exhaust
gas, expressed in ppm, or % volume;
Cd= measured concentration of pollutant i in the air used for
dilution, expressed in ppm, or % volume;
DF = dilution factor.
The dilution factor is calculated as follows:
For petrol and diesel:
DF¼13;4
CCO2þCHCþCCO ðÞ 10/C04
For LPG:
DF¼11;9
CCO2þCHCþCCO ðÞ 10/C04
For NG:
DF¼9;5
CCO2þCHCþCCO ðÞ 10/C04
where:
CCO2= concentration of CO2in the diluted exhaust gas
contained in the sampling bag, expressed in % volume;
CHC= concentration of HC in the diluted exhaust gas contained
in the sampling bag, expressed in ppm carbon equiva-
lent;
CCO= concentration of CO in the diluted exhaust gas contained
in the sampling bag, expressed in ppm.1980L1268 — EN — 31.12.1999 — 003.001 — 7
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6.4.1.4. Example
6.4.1.4.1. Data6.4.1.4.1.1. Ambient conditions:
ambient temperature: 23 ºC = 296,2 ºK,
barometric pressure: P
B= 101,33 kPa.
6.4.1.4.1.2. Volume measured and reduced to standard conditions
V¼51961 l
6.4.1.4.1.3. Analyser readings:
Diluted exhaust Dilution air
HC(1) 92 ppm 3,0 ppm
CO 470 ppm 0 ppm
CO21,6 % volume 0,03 % volume
(1) In ppm carbon equivalent.
6.4.1.4.2. Calculation
6.4.1.4.2.1. Dilution factor (DF) (see formula 5)
DF¼13;4
CCO2þCCHþCCO ðÞ 10/C04
DF¼13;4
1;6þ92þ470 ðÞ 10/C04
DF¼8;091
6.4.1.4.2.2. Calculation of the corrected concentration of pollutants in the
sampling bag:
HC mass emissions (see formulae 4 and 1)
Ci¼Ce/C0Cd1/C01
DF/C18/C19
(4)
CHC¼92/C031 /C01
8;091/C18/C19
CHC¼89;371 ppm
MHC¼CHC/C1Vmix/C1QHC/C11
d/C110/C06(1)
QHC¼0;619
MHC¼89;371/C151961 /C10;619/C110/C06/C11
d
MHC¼2;88
dg=km
CO mass emissions (see formula 1)
MCO¼CCO/C1Vmix/C1QCO/C11
d/C110/C06(1)
QCO¼1;25
MCO¼470/C151961 /C11;25/C110/C06/C11
d
MCO¼30;5
dg=km1980L1268 — EN — 31.12.1999 — 003.001 — 8
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CO2mass emissions (see formula 1)
Ci¼Ce/C0Cd1/C01
DF/C18/C19
(4)
CCO2¼1;6/C00;03 1 /C01
8;091/C18/C19
CCO2¼1;573 % volume
QCO2¼1;964
MCO2¼CCO2/C1Vmix/C1QCO2/C110/C02/C11
d(1)
MCO2¼1;573/C151961 /C11;964/C110/C02/C11
d
MCO2¼1605 ;27
dg=km
6.4.2. Special provisions relating to vehicles equipped with compression
ignition engines
HC measurements for compression-ignition engines
The average HC concentration used in determining the HC mass
emissions from compression-ignition engines is calculated withth e
aid of the following formula:
Ce¼Zt2
t1CHC/C1dt
t2/C0t1
where:
Zt2
t1CHC/C1dt= integral of the recording of the heated FID over
the test duration (t2−t1);
Ce= HC concentration of the diluted exhaust sample
as calculated from the integrated HC trace, in
ppm carbon equivalent.
6.5.Interpretationoftheresults
6.5.1. The CO2value adopted as the type-approval value shall be the value
declared by the manufacturer if the value measured by the technical
service does not exceed the declared value by more than 4 %. The
measured value can be lower without any limitations.
6.5.2. If the measured value of CO2exceeds the manufacturer's declared
CO2value by more than 4 %, then another test is run on the same
vehicle.
When the average of the two test results does not exceed the manu-
facturer's declared value by more than 4 %, then the value declared
by the manufacturer is taken as the type-approval value.
6.5.3. If the average still exceeds the declared value by more than 4 %, a
final test is run on the same vehicle.
The average of the three test results is taken as the type-approval
value.
7. CALCULATION OF FUEL CONSUMPTIONS
7.1. The fuel consumptions are calculated from the emissions of hydro-
carbons, carbon monoxide and carbon dioxide calculated in
accordance withparagraph6.1980L1268 — EN — 31.12.1999 — 003.001 — 9
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7.2. The fuel consumption, expressed in litres per 100 km (in the case of
petrol, LPG or diesel) or in m3per 100 km (in the case of NG), is
calculated by means of the following formulae:(1)
(a) for veh icles witha positive ignition engine fuelled withpetrol:
►C2FC¼0;1154 =D ðÞ /C2 0;866/C2THC ðÞ þ 0;429/C2CO ðÞ þ 0;273/C2CO2 ðÞ ½/C138 ◄
(b) for veh icles witha positive ignition engine fuelled withLPG:
FCnorm¼0;1212 =0;538 ðÞ /C2 0;825/C2THC ðÞ þ 0;429/C2CO ðÞ þ 0;273/C2CO2 ðÞ ½/C138
If the composition of the fuel used for the test differs from the
composition that is assumed for the calculation of the normal-
ised consumption, on the manufacturer's request a correction
factor cfmay be applied as follows:
FCnorm¼0;1212 =0;538 ðÞ /C2 cf/C20;825/C2THC ðÞ þ 0;429/C2CO ðÞ þ 0;273/C2C02 ðÞ ½/C138
The correction factor cf, which may be applied, is determined as
follows:
cf¼0;825þ0;0693 /C2nactual
where:
nactual= the actual H/C ratio of the fuel used
(c) for veh icles witha positive ignition engine fuelled withNG:
FCnorm¼0;1336 =0;654 ðÞ /C2 0;749/C2THC ðÞ þ 0;429/C2CO ðÞ þ 0;273/C2CO2 ðÞ ½/C138
(d) for vehicles with a compression ignition engine:
FC¼0;1155 =D ðÞ /C2 0;866/C2THC ðÞ þ 0;429/C2CO ðÞ þ 0;273/C2C02 ðÞ ½/C138
In these formulae:
FC = the fuel consumption in litre per 100 km (in the case of
petrol, LPG or diesel) or in m3per 100 km (in the case
of NG)
THC = the measured emission of total hydrocarbons in g/km
CO = the measured emission of carbon monoxide in g/km
CO2= the measured emission of carbon dioxide in g/km
D = the density of the test fuel at 15 ºC.
8. AMENDMENTS TO APPROVALS
8.1. In the case of amendments to approvals granted pursuant to this
Directive the provisions of Article 5 of Directive 70/156/EEC shall
apply.
9. CONFORMITY OF PRODUCTION FOR CO2EMISSIONS
9.1. As a general rule, measures to ensure the conformity of production
withregard to CO2emissions from vehicles is checked on the basis
of the description in the type-approval certificate set out in Annex II
to this Directive and in accordance with the provisions of Article 10
of Directive 70/156/EEC.
If the authority is not satisfied with the auditing procedure of the
manufacturer, then points 2.4.2 and 2.4.3 of Annex X to Directive
70/156/EEC shall apply.
9.1.1. If a vehicle type has had one or several extensions, the tests will be
carried out on the vehicle(s) described in the information package
which accompanied the first type-approval application.
9.1.1.1. Conformity of the vehicle for the CO2test.1980L1268 — EN — 31.12.1999 — 003.001 — 10
(1) Repeat for petrol and gaseous fuel in the case of a vehicle that can run either on petrol
or on a gaseous fuel. Vehicles that can be fuelled with both petrol and a gaseous fuel,but where the petrol system is fitted for emergency purposes or starting only and ofwhich the petrol tank cannot contain more than 15 litres of petrol will be regarded for
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9.1.1.1.1. Three vehicles are randomly taken in the series and are tested as
described in paragraph6 of th is Annex.
9.1.1.1.2. If the authority is satisfied with the production standard deviation
given by the manufacturer, according to Annex X to Directive 70/
156/EEC, the tests are carried out according to point 9.2 of this
Annex.
If the authority is not satisfied with the production standard devia-
tion given by the manufacturer according to Annex X to Directive
70/156/EEC, the tests are carried out according to point 9.3 of this
Annex.
9.1.1.1.3. The production of a series is regarded as conforming or non-
conforming, on the basis of tests on the three sampled vehicles,
once a pass or fail decision is reached for CO2, according to the
test criteria applied in the appropriate table.
If no pass decision and/or no fail decision is reached for CO2, a test
is carried out on an additional vehicle (see Figure I/8).
FIGURE I/8
9.1.1.2. Notwithstanding the requirements of point 5.1.1 of this Annex, the
tests will be carried out on vehicles which have not travelled any
distance.
9.1.1.2.1. However, at the request of the manufacturer, the tests will be
carried out on vehicles which have been run-in a maximum of
15000 km.
In this case, the running-in procedure will be conducted by the
manufacturer who shall undertake not to make any adjustments to
those vehicles.
9.1.1.2.2. If the manufacturer asks to conduct a running-in procedure (‘x’ km,
where x≤15000 km), it may be carried out as follows:
— the emission of CO2will be measured at zero and at ‘x’ km on
the first tested vehicle (which can be the type-approval vehicle),
— the evolution coefficient of the emission between zero and ‘x’
km will be calculated as follows:
EC =Emissions ‘x’ km
Emissions zero km
It may be less than one,1980L1268 — EN — 31.12.1999 — 003.001 — 11
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— the following vehicles will not be subjected to the running-in
procedure, but their zero km emissions will be modified by the
evolution coefficient, EC.
In this case, the values to be taken will be:
— the value at ‘x’ km for the first vehicle,
— the values at zero km multiplied by the evolution coefficient
for the following vehicles.
9.1.1.2.3. As an alternative to this procedure, the car manufacturer can use a
fixed evolution coefficient EC of 0,92 and multiply all values of
CO2measured at zero km by this factor.
9.1.1.2.4. The reference fuels described in Annex IX and Annex IXa to Direc-
tive 70/220/EEC, as last amended, shall be used for testing.
9.2. Conformity of production when manufacturer's statistical data is
available
9.2.1. The following sections describe the procedure to be used to verify
the CO2conformity of production requirements when the manufac-
turer's production standard deviation is satisfactory.
9.2.2. With a minimum sample size of three the sampling procedure is set
so that the probability of a lot passing a test with 40 % of the
production defective is 0,95 (producer's risk = 5 %), while the prob-ability of a lot being accepted with65 % of th e production defective
is 0,1 (consumer's risk = 10 %).
9.2.3. The following procedure is used (see Figure I/8).
Let L be the natural logarithm of the CO
2type-approval value:
xi= the natural logarithm of the measurement for the i-th vehicle
of the sample;
s = an estimate of the production standard deviation (after taking
the natural logarithm of the measurements);
n = the current sample number.
9.2.4. Compute for the sample, the test statistic quantifying the sum of the
standardized deviations to the limit and defined as:
1
sXn
i¼1L/C0xi ðÞ
9.2.5. Then:
— if the test statistic is greater than the pass decision number for
the sample size given in Table I/ - /9.2.5, a pass decision is
reached,
— if the test statistic is less than the fail decision number for the
sample size given in Table I/ - /9.2.5, a fail decision is reached,
— otherwise, an additional vehicle is tested according to point 6 of
this Annex and the procedure is applied to the sample with one
unit more.
TABLE I/ - /9.2.5
Sample size
(cumulative number of vehi-
cles tested)Pass Decision No Fail Decision No
(a) (b) (c)
3 3,327 − 4,724
4 3,261 − 4,7905 3,195 − 4,8566 3,129 − 4,9227 3,063 − 4,9888 2,997 − 5,054
9 2,931 − 5,120
10 2,865 − 5,18511 2,799 − 5,25112 2,733 − 5,31713 2,667 − 5,3831980L1268 — EN — 31.12.1999 — 003.001 — 12
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Sample size
(cumulative number of vehi-
cles tested)Pass Decision No Fail Decision No
14 2,601 − 5,449
15 2,535 − 5,51516 2,469 − 5,581
17 2,403 − 5,647
18 2,337 − 5,71319 2,271 − 5,77920 2,205 − 5,84521 2,139 − 5,91122 2,073 − 5,97723 2,007 − 6,04324 1,941 − 6,10925 1,875 − 6,175
26 1,809 − 6,241
27 1,743 − 6,30728 1,677 − 6,37329 1,611 − 6,43930 1,545 − 6,50531 1,479 − 6,57132 − 2,112 − 2,112
9.3. Conformity of production when manufacturer's statistical data is
unsatisfactory or unavailable.
9.3.1. The following sections describe the procedure to be used to verify
the CO
2conformity of production requirements when the manufac-
turer's evidence of production standard deviation is either
unsatisfactory or unavailable.
9.3.2. With a minimum sample size of three the sampling procedure is set
so that the probability of a lot passing a test with 40 % of the
production defective is 0,95 (producer's risk = 5 %), while the prob-
ability of a lot being accepted with65 % of th e production defective
is 0,1 (consumer's risk = 10 %).
9.3.3. The measurement of CO2is considered to be log normally distrib-
uted and should first be transformed by taking the naturallogarithms. Let m
0and m denote the minimum and maximum
sample sizes respectively (m0= 3 and m = 32) and let n denote the
current sample number.
9.3.4. If the natural logarithms of the measurements in the series are x1,x2,
…, xjand L is the natural logarithm of the CO2type-approval value,
then define:
dj¼xj/C0L
;C22ddn¼1
nXn
j¼1dj
and:
V2
n¼1
nXn
j¼1dj/C0;C22ddn/C0/C12
9.3.5. Table I/ - /9.3.5 shows values of the pass (An) and fail (Bn) decision
numbers against current sample number. The test statistic is the
ratio;C22ddn/Vnand shall be used to determine whether the series has
passed or failed as follows:
for m0≤n≤m:
— pass the series if ;C22ddn/Vn≤An,
— fail the series if ;C22ddn/Vn≥Bn,
— take another measurement if An<;C22ddn/Vn<Bn.
9.3.6. Remarks
The following recursive formulae are useful for computing succes-
sive values of the test statistic:1980L1268 — EN — 31.12.1999 — 003.001 — 13
▼M2
;C22ddn¼1/C01
n/C18/C19
;C22ddn/C01þ1
ndn
V2
n¼1/C01
n/C18/C19
V2
n/C01þ;C22ddn/C0dn/C0/C12
n/C01
n¼2;3;...;;C22dd1¼d1;V 1 ¼0/C0/C1
TABLE I/ - /9.3.5
Sample size
(cumulative number of vehi-
cles tested)
nPass Decision No
AnFail Decision No
Bn
(a) (b) (c)
3 − 0,80381 16,64743
4 − 0,76339 7,686275 − 0,72982 4,671366 − 0,69962 3,255737 − 0,67129 2,454318 − 0,64406 1,943699 − 0,6175 1,59105
10 − 0,59135 1,33295
11 − 0,56542 1,1356612 − 0,5396 0,979713 − 0,51379 0,8530714 − 0,48791 0,7480115 − 0,46191 0,6592816 − 0,43573 0,5832117 − 0,40933 0,5171818 − 0,38266 0,4592219 − 0,3557 0,40788
20 − 0,3284 0,36203
21 − 0,30072 0,3207822 − 0,27263 0,2834323 − 0,2441 0,2494324 − 0,21509 0,2183125 − 0,18557 0,189726 − 0,1555 0,1632827 − 0,12483 0,138828 − 0,09354 0,11603
29 − 0,06159 0,0948
30 − 0,02892 0,0749331 ►
C10,00449◄ 0,05629
32 ►C10,03876◄ 0,03876
10. SPECIAL PROVISIONS
10.1. In the future, vehicles with special fuel efficient technologies may
be offered which could be submitted to complementary testingprogrammes. These would be specified at a later stage which can
be claimed by the manufacturer in order to demonstrate the advan-
tages of the solution.
11. EXTENSION OF APPROVAL
11.1. The type-approval can be extended to vehicles from the same type
or from a different type differing with regard to the following char-
acteristics of Annex II if the CO
2emissions measured by the
technical service do not exceed by more than 4 % the type-approval
value:
11.1.1. Mass.11.1.2. Maximum authorized mass.11.1.3. Type of bodywork: saloon, estate, coupé.1980L1268 — EN — 31.12.1999 — 003.001 — 14
▼M2
11.1.4. Overall gear ratios.
11.1.5. Engine equipment and accessories.1980L1268 — EN — 31.12.1999 — 003.001 — 15
▼M2
ANNEX II
MODEL
(maximum format: A4 (210 × 297 mm))
EC TYPE-APPROVAL CERTIFICATE
1980L1268 — EN — 31.12.1999 — 003.001 — 16
▼M2
►(1) (2)M31980L1268 — EN — 31.12.1999 — 003.001 — 17