Regulation No. 85-00

Name:Regulation No. 85-00
Description:Power Measurement - Category M and N Vehicles.
Official Title:Uniform Provisions Concerning the Approval of: Internal Combustion Engines or Electric Drive Trains Intended for the Propulsion of Motor Vehicles of Categories M and N with Regard to the Measurement of the Netpower and the Maximum 30min Power of Electric Drive Trains.
Country:ECE - United Nations
Date of Issue:1991-09-09
Amendment Level:00 Series, Supplement 7
Number of Pages:51
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck
Subject Categories:Emissions and Fuel Consumption
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Keywords:

power, engine, drive, approval, fuel, type, maximum, regulation, train, test, net, annex, air, engines, electric, system, manufacturer, make, equipment, temperature, production, speed, motor, pressure, conditions, min, reference, vehicle, trains, number, combustion, internal, case, fitted, means, characteristics, injection, measured, tests, paragraph, description, auxiliaries, exhaust, vehicles, factor, dual-fuel, point, ignition, cooling, date

Text Extract:

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E/ECE/324
) Rev.1/Add.84/Rev.1/Corr.1
E/ECE/TRANS/505 )
September 22, 2016
STATUS OF UNITED NATIONS REGULATION
ECE 85-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
INTERNAL COMBUSTION ENGINES OR ELECTRIC DRIVE TRAINS
INTENDED FOR THE PROPULSION OF MOTOR VEHICLES OF
CATEGORIES M AND N WITH REGARD TO THE MEASUREMENT
OF THE NET POWER AND THE MAXIMUM 30 MINUTES POWER
OF ELECTRIC DRIVE TRAINS
Incorporating:
00 series of amendments
Date of Entry into Force: 15.09.90
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 09.07.96
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 14.05.98
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 27.02.04
Supplement 4 to the 00 series of amendments
Date of Entry into Force: 23.06.05
Supplement 5 to the 00 series of amendments
Date of Entry into Force: 17.03.10
Supplement 6 to the 00 series of amendments
Date of Entry into Force: 15.07.13
Corr.1 to Revision 1 of the Regulation
Dated 22.09.2016
Supplement 7 to the 00 series of amendments
Date of Entry into Force: 18.06.16

REGULATION No. 85-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF INTERNAL COMBUSTION ENGINES
OR ELECTRIC DRIVE TRAINS INTENDED FOR THE PROPULSION OF MOTOR VEHICLES OF
CATEGORIES M AND N WITH REGARD TO THE MEASUREMENT OF
NET POWER AND THE MAXIMUM 30 MINUTES POWER OF ELECTRIC DRIVE TRAINS
REGULATION
CONTENTS
1.
Scope
2.
Definitions
3.
Application for Approval
4.
Approval
5.
Specifications and Tests
6.
Conformity of Production
7.
Penalties for Non-conformity of Production
8.
Modification and Extension of Approval of the Drive Train Type
9.
Production Definitively Discontinued
10.
Names and Addresses of Technical Services Responsible for Conducting Tests, and of Type
Approval Authorities
ANNEXES
Annex 1 − Essential Characteristics of the Internal Combustion Engine and Information Concerning
the Conduct of Tests
Annex 2 − Essential Characteristics of the Electric Drive Train and Information Concerning the
Conduct of Tests
Annex 3a − Communication Concerning the Approval or Extension or Refusal or Withdrawal of
Approval or Production Definitely Discontinued of a Drive Train Type Pursuant to
Regulation No. 85
Annex 3b − Communication Concerning the Approval or Extension or Refusal or Withdrawal of
Approval or Production Definitely Discontinued of a Vehicle Type with Regard to the Drive
Train Type Pursuant to Regulation No. 85
Annex 4 − Arrangements of Approval Marks
Annex 5 − Method for Measuring Internal Combustion Engine Net Power
Annex 6 − Method for Measuring Net Power and the Maximum 30min Power of Electric Drive Trains
Annex 7 − Checks on Conformity of Production
Annex 8 – Reference Fuels

2.6. "Hybrid vehicles (HV)"
2.6.1. "Hybrid vehicle (HV)" means a vehicle with at least two different energy converters and
two different energy storage systems (on vehicle) for the purpose of vehicle propulsion.
2.6.2. "Hybrid electric vehicle (HEV)" means a vehicle that, for the purpose of mechanical
propulsion, draws energy from both of the following on-vehicle sources of stored
energy/power:

A consumable fuel;
− An electrical energy/power storage device (e.g.: battery, capacitor,
flywheel/generator …);
2.6.3. For a hybrid electric vehicle the "power train" comprises a combination of two different drive
train types:


An internal combustion engine, and
One (or several) electric drive train(s).
2.7. "Standard-production equipment" means equipment provided by the manufacturer for a
particular application.
2.8. "Dual-fuel engine" means an engine system type approved according to Regulation No. 49
or mounted on a vehicle type approved with regards to its emissions according to
Regulation No. 49 and that is designed to simultaneously operate with diesel fuel and a
gaseous fuel, both fuels being metered separately, where the consumed amount of one of
the fuels relative to the other one may vary depending on the operation;
2.9. "Dual-fuel vehicle" means a vehicle that is powered by a dual-fuel engine and that
supplies the fuels used by the engine from separate on-board storage systems;
2.10. "Dual-fuel mode" means the normal operating mode of a dual-fuel engine during which the
engine simultaneously uses diesel fuel and a gaseous fuel at some engine operating
conditions;
2.11. "Diesel mode" means the normal operating mode of a dual-fuel engine during which the
engine does not use any gaseous fuel for any engine operating condition.
3. APPLICATION FOR APPROVAL
3.1. The application for approval of a drive train type with regard to the measurement of the net
power and the maximum 30min power of electric drive trains shall be submitted by the drive
train manufacturer, the vehicle manufacturer, or by his duly accredited representative.
3.2. It shall be accompanied by the description, in triplicate, of the drive train comprising all the
relevant particulars referred to:



in Annex 1 for vehicles powered by an internal combustion engine only, or
in Annex 2 for pure electric vehicles, or
in Annexes 1 and 2 for hybrid electric vehicles.

4.7. The approval mark shall be clearly legible and be indelible.
4.8. The approval mark shall be placed close to the drive train identification figures provided by
the manufacturer.
4.9. Annex 4 to this Regulation gives examples of the arrangements of the approval mark.
5. SPECIFICATIONS AND TESTS
5.1. General
The components liable to affect the power of the drive train shall be so designed,
constructed and assembled as to enable the drive train in normal use, despite the vibration
to which it may be subjected, to comply with the provisions of this Regulation.
5.2. Description of tests for internal combustion engines
5.2.1. The net power test shall consist of a run at full throttle for positive-ignition engines and at
full-load for compression ignition engine and dual-fuel engines, the engine being equipped
as specified in Table 1 of Annex 5 to this Regulation.
5.2.1.1. In case of a dual-fuel engine that has a diesel mode, the test shall consist of a run on the
dual-fuel mode and of a run on the diesel mode of that same engine.
5.2.2. Measurements shall be taken at a sufficient number of engine speeds to define correctly the
power curve between the lowest and the highest engine speeds recommended by the
manufacturer. This range of speeds shall include the speeds of revolution at which the
engine produces its maximum power and its maximum torque. For each speed, the average
of at least two stabilized measurements is to be determined.
5.2.3. The fuel used shall be the following:
5.2.3.1. For positive ignition engines fuelled with petrol:
The fuel used shall be the one available on the market. In any case of dispute, the fuel shall
be one of the reference fuels defined by CEC for petrol fuelled engines, in CEC
documents RF-01-A-84 and RF-01-A-85.
5.2.3.2. For positive ignition engines and dual-fuel engines fuelled with LPG:
5.2.3.2.1. In the case of an engine with self-adaptive fuelling:
The fuel used shall be the one available on the market. In any case of dispute the fuel shall
be one of the reference fuels specified in Annex 8;
5.2.3.2.2. In the case of an engine without self-adaptive fuelling:
The fuel used shall be the reference fuel specified in Annex 8 with the lowest C3-content, or

5.2.3.6. Dual-fuel engines or vehicles that have a diesel mode are to be tested with the fuels
appropriate to each mode, in accordance with the provisions set in Paragraphs 5.2.3.1 to
5.2.3.5.
5.2.4. Measurements shall be carried out according to the provisions of Annex 5 to this
Regulation.
5.2.5. The test report shall contain the results and all the calculations required to find the net
power, as listed in the Appendix to Annex 5 to this Regulation together with the
characteristics of the engine listed in Annex 1 to this Regulation. In order to draw up this
document, the competent authority may use the report prepared by an approved or
recognised laboratory pursuant to the provisions of this Regulation.
5.3. Description of Tests for Measuring the Net Power and the Maximum 30min Power of
Electric Drive Trains
The electric drive train shall be equipped as specified in Annex 6 to this Regulation. The
electric drive train shall be supplied from a DC voltage source with a maximum voltage drop
of 5% depending on time and current (periods of less than 10s excluded). The supply
voltage of the test shall be given by the vehicle manufacturer.
Note: If the battery limits the maximum 30min power, the maximum 30min power of an
electric vehicle can be less than the maximum 30min power of the drive train of the
vehicle according to this test.
5.3.1. Determination of the Net Power
5.3.1.1. The motor and its entire equipment assembly must be conditioned at a temperature of 25°C
±5°C for a minimum of 2h.
5.3.1.2. The net power test shall consist of a run at full setting of the power controller.
5.3.1.3. Just before beginning the test, the motor shall be run on the bench for three minutes
delivering a power equal to 80% of the maximum power at the speed recommended by the
manufacturer.
5.3.1.4. Measurements shall be taken at a sufficient number of motor speeds to define correctly the
power curve between zero and the highest motor speed recommended by the manufacturer.
The whole test shall be completed within 5min.
5.3.2. Determination of the Maximum 30min Power
5.3.2.1. The motor and its entire equipment assembly must be conditioned at a temperature of 25°C
±5°C for a minimum of four hours.
5.3.2.2. The electric drive train shall run at the bench at a power which is the best estimate of the
manufacturer for the maximum 30min power. The speed must be in a speed range, which
the net power is greater than 90% of the maximum power measured in Paragraph 5.3.1.
This speed shall be recommended by the manufacturer.
5.3.2.3. Speed and power shall be recorded. The power must be in a range of ±5% of the power
value at the start of the test. The maximum 30min power is the average of the power within
the 30min period.

9. PRODUCTION DEFINITELY DISCONTINUED
If the holder of an approval completely ceases to manufacture a drive train approved in
accordance with this Regulation, he shall so inform the Type Approval Authority which
granted the approval. Upon receiving the relevant communication that authority shall inform
thereof the other Parties to the 1958 Agreement applying this Regulation by means of a
communication form conforming to the model in Annex 3a or Annex 3b to this Regulation.
10. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF TYPE APPROVAL AUTHORITIES
The Parties to the Agreement which apply this Regulation shall communicate to the United
Nations Secretariat the names and addresses of the Technical Services responsible for
conducting approval tests, and/or the Type Approval Authorities which grant approval, and
to which forms certifying approval or extension or refusal of approval, issued in other
countries, are to be sent.

2.8. Engine capacity: ................................................................................................................. cm
2.9. Volumetric compression ratio: ...................................................................................................
2.10. Drawings of combustion chamber, piston crown and, in the case of positive ignition engines,
piston rings:
2.11. Maximum net power: ..................................... kW at ....................................................... min
(manufacturer's declared value)
2.12. Maximum permitted engine speed as prescribed by the manufacturer: .......................... min
2.13. Maximum net torque : ................................. Nm at ....................................................... min
(manufacturer's declared value)
3.0. Fuel: diesel oil/petrol/LPG/CNG/LNG
3.0.1. When applicable, the additional character(s) in the approval marking required by
Regulation No. 49, the purpose of which is to distinguish the type of engine for which the
approval has been granted (e.g. HLt).
3.1. RON, leaded: ............................................................................................................................
3.2. RON, unleaded: ........................................................................................................................
3.3. Fuel feed
3.3.1. By carburettor(s): yes/no ........................................................................................................
3.3.1.1. Make(s): ....................................................................................................................................
3.3.1.2. Type(s): .....................................................................................................................................
3.3.1.3. Number fitted: ............................................................................................................................
3.3.1.4. Adjustments
3.3.1.4.1. Jets: ...........................................................................................................................................
3.3.1.4.2. Venturis: ....................................................................................................................................
3.3.1.4.3. Float-chamber level: ..................................................................................................................
3.3.1.4.4. Mass of float: .............................................................................................................................
3.3.1.4.5. Float needle: .............................................................................................................................
Or the curve of fuel delivery plotted against the air flow and settings required to keep to the
curve

3.3.2.6. Injector(s)
3.3.2.6.1. Make(s): ....................................................................................................................................
3.3.2.6.2. Type(s): .....................................................................................................................................
3.3.2.6.3. Opening pressure: ................................... kPa or characteristic diagram: ................................
3.3.2.7. Cold start system
3.3.2.7.1. Make(s): ....................................................................................................................................
3.3.2.7.2. Type(s): .....................................................................................................................................
3.3.2.7.3. Description: ...............................................................................................................................
3.3.2.8. Electronic control unit
3.3.2.8.1. Make(s): ....................................................................................................................................
3.3.2.8.2. Description of the system: .........................................................................................................
3.3.3. By fuel injection (positive ignition only): yes/no
3.3.3.1. Working principle: intake manifold (single-/multi-point direct injection/other
(specify): .................................................................................................................................
3.3.3.2. Make(s): ....................................................................................................................................
3.3.3.3. Type(s): .....................................................................................................................................
3.3.3.4. System description
3.3.3.4.1. Type or number of the control unit: ...........................................................................................
3.3.3.4.2. Type of fuel regulator: ...............................................................................................................
3.3.3.4.3. Type of air-flow sensor: .............................................................................................................
3.3.3.4.4. Type of fuel distributor: .............................................................................................................
3.3.3.4.5. Type of pressure regulator: .......................................................................................................
3.3.3.4.6. Type of throttle housing: ...........................................................................................................
In the case of systems other than continuous injection give equivalent details.
3.3.3.5. Injectors: opening pressure: .................... kPa or characteristic diagram: ................................
3.3.3.6. Injection timing: .........................................................................................................................

7.2.4. Drive ratio(s): .............................................................................................................................
7.2.5. Description of the fan and its drive mechanism: .......................................................................
7.3. Air
7.3.1. Blower: yes/no
7.3.2. Characteristics: .................................................................................................................... , or
7.3.2.1. Make(s): ....................................................................................................................................
7.3.2.2. Type(s): .....................................................................................................................................
7.3.3. Drive ratio(s): .............................................................................................................................
8.0. INTAKE SYSTEM
8.1. Pressure charger: yes/no
8.1.1. Make(s): ....................................................................................................................................
8.1.2. Type(s): .....................................................................................................................................
8.1.3. Description of the system (e.g. maximum charge pressure: .........................kPa, wastegate if
applicable): ................................................................................................................................
8.2. Intercooler: yes/no
8.3. Description and drawings of inlet pipes and their accessories (plenum chamber, heating
device, additional air intakes, etc.): ...........................................................................................
8.3.1. Intake manifold description (include drawings and/or photos): .................................................
8.3.2. Air filter, drawings: ................................................................................................................ , or
8.3.2.1. Make(s): ....................................................................................................................................
8.3.2.2. Type(s): .....................................................................................................................................
8.3.3. Intake silencer, drawings: .................................................................................................... , or
8.3.3.1. Make(s): ....................................................................................................................................
8.3.3.2. Type(s): .....................................................................................................................................

13.3. Further documentation: .............................................................................................................
13.3.1. Description of the safeguarding of the catalyst at switch-over from petrol to LPG or
back: ..........................................................................................................................................
13.3.2. System lay-out (electrical connections, vacuum connections compensation
hoses, etc.): ...............................................................................................................................
13.3.3. Drawing of the symbol: ..............................................................................................................
14.0. NG fuelling system: yes/no
14.1. Approval number according to Regulation No. 110: .................................................................
14.2. Electronic engine management control unit for NG fuelling:
14.2.1. Make(s): ....................................................................................................................................
14.2.2. Type(s): .....................................................................................................................................
14.2.3. Emission-related adjustment possibilities: ................................................................................
14.3. Further documentations: ...........................................................................................................
14.3.1. Description of the safeguarding of the catalyst at switch-over from petrol to NG or
back: ..........................................................................................................................................
14.3.2. System lay-out (electrical connections, vacuum connections compensation hoses,
etc.): ..........................................................................................................................................
14.3.3. Drawing of the symbol: .............................................................................................................
15.0. TEMPERATURES PERMITTED BY THE MANUFACTURER
15.1. Cooling system
15.1.1. Liquid cooling
15.1.2. Air cooling
Maximum temperature at outlet: .......................................................................................... °C
15.1.2.1. Reference point: ........................................................................................................................
15.1.2.2. Maximum temperature at reference point: ........................................................................... °C
15.2. Maximum outlet temperature of the inlet intercooler: ........................................................... °C
15.3. Maximum exhaust temperature at the point in the exhaust pipe(s) adjacent to the outer
flange(s) of the exhaust manifold: ........................................................................................ °C

17.2.
Ignition coil
17.2.1.
Make: ........................................................................................................................................
17.2.2.
Type: .........................................................................................................................................
17.3.
Ignition condenser
17.3.1.
Make: ........................................................................................................................................
17.3.2.
Type: .........................................................................................................................................
17.4.
Radio interference suppression equipment
17.4.1.
Make: ........................................................................................................................................
17.4.2.
Type: .........................................................................................................................................
17.5.
Gas fuel used for the test: Reference fuel
/other
17.5.1.
If the gas fuel used for the test is a reference fuel, label of that gas:
17.5.2.
If the gas fuel used for the test is not a reference fuel, composition of that gas:
...................................................................................................................................................
(Date, file)

2.1.4. Rotor coiled/with permanent magnets/with housing
2.1.5. Number of poles of the motor: ...................................................................................................
2.2. Inertia mass: ...............................................................................................................................
3. POWER CONTROLLER
3.1. Make: .........................................................................................................................................
3.2. Type: ..........................................................................................................................................
3.3. Control principle: vectorial/open loop/closed/other, to be specified: ..........................................
3.4.
Maximum effective current supplied to the motor:
................................................................ A
during ........................ seconds
3.5. Voltage range use: ........................................................................................................... V to V
4. COOLING SYSTEM:
Motor : liquid/air
Controller : liquid/air
4.1. Liquid-cooling equipment characteristics
4.1.1. Nature of the liquid ......................................................................... circulating pumps: yes/no
4.1.2. Characteristics or make(s) and type(s) of the pump: .................................................................
4.1.3. Thermostat: setting ....................................................................................................................
4.1.4. Radiator: drawing(s) or make(s) and type(s) .............................................................................
4.1.5. Relief valve: pressure setting .....................................................................................................
4.1.6. Fan: characteristics or make(s) and type(s) ..............................................................................
4.1.7. Fan duct: ....................................................................................................................................
4.2. Air-cooling equipment characteristics
4.2.1. Blower: characteristics or make(s) and type(s) ..........................................................................
4.2.2. Standard air ducting: ..................................................................................................................

ANNEX 3a
(Maximum format: A4 (210 × 297mm))
COMMUNICATION
issued by:
Name of administration:
.............................................
.............................................
concerning
:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITIVELY DISCONTINUED
of a drive train pursuant to Regulation No. 85.
Approval No. ........................................ Extension No. ......................
1. Trade name or mark of drive train or set of drive trains: ............................................................
2. Internal combustion engine:
2.1. Make: .........................................................................................................................................
2.2. Type: ..........................................................................................................................................
2.3. Manufacturer's name and address: ...........................................................................................
3. Electric drive train(s): .................................................................................................................
3.1. Make: .........................................................................................................................................
3.2. Type: ..........................................................................................................................................
3.3. Manufacturer's name and address: ...........................................................................................
5. Drive train or set of drive trains submitted for approval on: .......................................................
6. Technical service responsible for conducting approval tests: ...................................................
7. Date of report issued by that service: ........................................................................................

12.2.3.
Cooling system:
Motor: liquid/air
Variator: liquid/air
13.
Approval granted/extended/refused/withdrawn
14.
Place: .........................................................................................................................................
15.
Date: ...........................................................................................................................................
16.
Signature: ...................................................................................................................................
17.
The documents filed with the request for approval or extension may be obtained on request.

9.
Date of report issued by that service: .......................................................................................
10.
Number of report issued by that service: ...................................................................................
11.
Location of the approval mark: ..................................................................................................
12.
Reason(s) for extension of approval (if applicable): ..................................................................
13.
Internal combustion engine
13.1.
Declared figures
13.1.1.
Maximum net power: ......................................
kW, at ............................................... min
13.1.2.
Maximum net torque: .....................................
Nm, at .............................................. min
13.2.
Essential characteristics of the engine type:
Operating principle: four stroke/two stroke
Number and layout of cylinders: ...............................................................................................
Cylinder capacity: ................................................................................................................ cm
Fuel feed: carburettor/indirect injection/direct injection
Pressure-charger device: Yes/No
Exhaust gas cleaning device: Yes/No
Dual-fuel engine: Yes with a diesel mode/Yes without a diesel mode/No
13.3.
Engine fuel requirements: leaded petrol/unleaded petrol/diesel fuel/CNG/LNG/LPG:
: ..........
14.
Electric drive train(s): .................................................................................................................
15.1.
Declared figures
15.1.1.
Maximum net power: ...................................... kW, at ......................................................... min
15.1.2.
Maximum net torque: ..................................... Nm, at ......................................................... min
15.1.3.
Maximum net torque at zero speed: .................................................................................... Nm
15.1.4.
Maximum 30min power: ........................................................................................................ kW

ANNEX 4
ARRANGEMENTS OF APPROVAL MARKS
Model A
(see Paragraph 4.4 of this Regulation)
a = 8mm min.
The above approval mark affixed to a drive train shows that the drive train type concerned has been
approved in the Netherlands (E4) with regard to the measurement of the net power, pursuant to
Regulation No. 85 and under the approval number 002492. The approval number indicates that the
approval was granted in accordance with the requirements of Regulation No. 85 in its original form.
Model B
(see Paragraph 4.5 of this Regulation)
a = 8mm min.
The above approval mark affixed to a vehicle shows that the vehicle type concerned has been approved
in the Netherlands (E4) pursuant to Regulations Nos. 85 and 31. The first two digits of the approval
numbers indicate that, at the dates when the respective approvals were granted, Regulation No. 85 had
not been modified, and Regulation No. 31 already included the 01 series of amendments.

Table 1
Auxiliaries to be Fitted for the Test to Determine Net Power of Engine
("Standard-production equipment" means equipment provided by the manufacturer for a particular
application)
No. Auxiliaries Fitted for net power test
1 Intake system
Intake manifold
Crankcase emission control system
Air filter
Intake silencer
Speed limiting device
Yes, standard production equipment
Yes, standard production equipment
2
Induction heating device of intake manifold
Yes, standard production equipment. If
possible, to be set in the most
favourable position
3 Exhaust system
Exhaust purifier
Exhaust manifold
Supercharging device
Connecting pipes
Silencer
Tail pipe
Exhaust brake
Yes, standard production equipment
4 Fuel supply pump Yes, standard production equipment
5 Carburettor
Electronic control system, air flow meter etc. (if
fitted)
Pressure reducer
Evaporator
Mixer
Yes, standard production equipment
Equipment for gas engines


3.5. The engine speed during a run or reading shall not deviate from the selected speed by more
than ±1% or ±10min , whichever is greater.
3.6. Observed brake load, fuel consumption and inlet air temperature data shall be taken
simultaneously and shall be the average of two stabilised consecutive values which do not
vary more than 2% for the brake load and fuel consumption.
3.7. The temperature of the coolant at the outlet from the engine shall be kept at the value
specified by the manufacturer. If no temperature is specified by the manufacturer, the
temperature shall be 353K ± 5K. For air-cooled engines, the temperature at a point

5.4. Determination of Correction Factor α and α
5.4.1. Naturally Aspirated or Pressure-charged Positive-ignition Engine Factor α
The correction factor α is obtained by applying the formula:
α
⎛ 99 ⎞
= ⎜ ⎟
⎝ P ⎠

⎛ T ⎞
⎜ ⎟
⎝ 298 ⎠
where
P
T
is the total dry atmospheric pressure in kilopascals (kPa); that is to say, the total
barometric pressure minus water vapour pressure
is the absolute temperature in kelvins (K) of the air drawn in by the engine.
Conditions to be complied with in the laboratory
For a test to be valid, the correction factor α must be such that 0.93 ≤α ≤1.07
If these limits are exceeded, the corrected value obtained shall be given and the test
conditions (temperature and pressure) precisely stated in the test report.
5.4.2. Diesel Engines - Factor α
The power correction factor (α ) for diesel engines at constant fuel rate is obtained by
applying the formula:
where α = (f ) f
f
f
is the atmospheric factor
is the characteristic parameter for each type of engine and adjustment
5.4.2.1. Atmospheric factor f
This factor indicates the effects of environmental conditions (pressure, temperature and
humidity) on the air drawn in by the engine. The atmospheric factor formula differs
according to the type of engine.

5.4.2.3. Conditions to be complied with in the laboratory
For a test to be valid; the correction factor α must be such that 0.9 ≤α ≤1.1. If these limits
are exceeded, the corrected value obtained shall be given and the test conditions
(temperature and pressure) precisely stated in the test report.
5.4.3. When a turbocharged engine is fitted with a system which allows compensating the ambient
conditions temperature and altitude, at the request of the manufacturer, the correction factor
α or α shall be set to the value of 1.

2.
FUEL
2.1.
For positive-ignition engines operating on liquid fuel
2.1.1.
Make: .........................................................................................................................................
2.1.2.
Specification ...............................................................................................................................
2.1.3.
Anti-knock additive (lead, etc): ..................................................................................................
2.1.3.1.
Type: ..........................................................................................................................................
2.1.3.2.
Content: ............................................................................................................................... mg/l
2.1.4.
Octane number RON: .................................................................................(ASTM D 26 99-70)
2.1.4.1.
MON No: ...................................................................................................................................
2.1.4.2.
Specific density: .................................................................................................. g/cm at 288K
2.1.4.3.
Lower calorific value:.......................................................................................................... kJ/kg
Table 1
Engine speed
(min )
Nominal flow G
(litres/second)
Limit absorption values
(m )
Measured absorption
values (m )
1
2
3
4
5
6
2.2.
For positive-ignition engines and dual-fuel engines operating on gaseous fuel
2.2.1.
Make: .........................................................................................................................................
2.2.2.
Specification: ..............................................................................................................................
2.2.3.
Storage pressure: .................................................................................................................. bar
2.2.4.
Utilization pressure:............................................................................................................... bar
2.2.5.
Lower calorific value:.......................................................................................................... kJ/kg

4. Detailed results of measurements
Engine speed, min
Measured torque, Nm
Measured power, kW
Measured fuel flow, g/h
Barometric pressure, kPa
Water vapour pressure, kPa
Inlet air temperature, K
Power to be added for
No. 1
auxiliaries in excess
No. 2
of Table 1, kW
No. 3
Power correction factor
Corrected brake power, kW (with/without fan)
Power of fan, kW (to be subtracted if fan not fitted)
Net power, kW
Net torque, Nm
Corrected specific fuel consumption g/(kWh)
Cooling liquid temperature at outlet, K
Lubricating oil temperature at measuring point, K
Air temperature after pressure-charger, K
Fuel temperature at injection pump inlet, K
Air temperature after charge air cooler, K
Pressure after pressure-charger,kPa
Pressure after charge air cooler,kPa

Table 1
Auxiliaries to be Fitted for the Test to Determine Net Power
and the Maximum 30min Power of Electric Drive Trains
("Standard-production equipment" means equipment provided by the manufacturer for a particular
application).
No.
Auxiliaries
Fitted for Net Power and the
Maximum 30min Power Test
1 DC voltage source Voltage drop during test less than 5%
2 Speed variator and control device Yes: Standard-production equipment
3
Liquid-cooling
Motor bonnet
)
Bonnet outlet
)
Radiator
)
Fan
)
Fan cowl
)
Pump
)
Thermostat
)
Air Cooling
Air filter
)
Cowl
)
Blower
)
Temperature adjustment system
)
No
Yes:
Yes:
Standard-production equipment
Standard-production equipment
4 Electric equipment Yes: Standard-production equipment
5 Bench test auxiliary fan Yes, if necessary

ANNEX 7
CHECKS ON CONFORMITY OF PRODUCTION
1. GENERAL
These requirements are consistent with tests to be held to check conformity of production,
according to Paragraph 6.3.6.
2. TEST PROCEDURES
The methods of testing and measuring instruments shall be those described in Annexes 5 or
6 to this Regulation.
3. COLLECTION OF SAMPLES
One drive train has to be chosen. If after the test of Paragraph 5.1 below, the drive train is
not considered as conforming to the requirements of this Regulation, two more drive trains
have to be tested.
4. MEASUREMENT CRITERIA
4.1. Net Power of Internal Combustion Engine
During the tests to verify conformity of production, the power shall be measured at two
engine speeds S1 and S2 corresponding respectively to the measurement points of
maximum power and maximum torque accepted for type approval. At these two engine
speeds, which are subject to a tolerance of ±5%, the net power measured at least one point
within the ranges S1 ± 5% and S2 ± 5% shall not differ by more than ±5% from the approval
figure.
4.2. Net Power and Maximum 30min Power of Electric Drive Trains
During the tests to verify conformity of production the power shall be measured at motor
speed S1 corresponding to the measurement point of maximum power accepted for type
approval. At this speed, the net power shall not differ by more than ±5% from the approval
figure.
5. EVALUATION OF RESULTS
5.1. If the net power and the maximum 30min power of the drive train tested pursuant to
Paragraph 2. above fulfils the requirement of Paragraph 4. above, the production is
considered to conform to the type approval.
5.2. If the requirements of Paragraph 4. above are not fulfilled, two more drive trains are tested
in the same way.
5.3. If the net power figure or the maximum 30min power of the second and/or third drive train of
Paragraph 5.2. does not fulfil the requirements of Paragraph 4. above, the production shall
be considered not to conform to the requirements of this Regulation and the provisions of
Paragraph 7.1. shall be put into effect.

The Wobbe Index is the ratio of the calorific value of a gas per unit volume and the square
root of its relative density under the same reference conditions:
Wobbe Index =
H
p
p
with H = calorific value of the fuel in MJ/m at 0°C
p = density of air at 0°C
p = density of fuel at 0°C
The Wobbe Index is said to be gross or net according to whether the calorific value uses is
the gross or net calorific value.
Power Measurement - Category M and N Vehicles.