Regulation No. 120-00

Name:Regulation No. 120-00
Description:Net Power, Torque and Fuel Consumption.
Official Title:Uniform Provisions Concerning the Approval of: Internal Combustion Engines to be Installed in Agricultural and Forestry Tractors and in Non-road Mobile Machinery, with Regard to the Measurement of the Netpower, Net Torque and Specific Fuel Consumption.
Country:ECE - United Nations
Date of Issue:2005-04-06
Amendment Level:00 Series, Supplement 1
Number of Pages:52
Vehicle Types:Agricultural Tractor, Component
Subject Categories:Prior Versions
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Keywords:

engine, fuel, power, type, approval, maximum, engines, regulation, annex, equipment, speed, family, production, net, test, system, air, manufacturer, pressure, standard, make, reference, number, temperature, min, characteristics, exhaust, torque, rated, injection, inlet, case, combustion, point, pump, conditions, kpa, minimum, en-iso, parent, applicable, method, measured, appendix, approved, cooling, internal, positive-ignition, iso, content

Text Extract:

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E/ECE/324
) Rev.2/Add.119/Amend.1
E/ECE/TRANS/505 )
May 23, 2012
STATUS OF UNITED NATIONS REGULATION
ECE 120
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
INTERNAL COMBUSTION ENGINES TO BE INSTALLED IN
AGRICULTURAL AND FORESTRY TRACTORS AND IN
NON-ROAD MOBILE MACHINERY, WITH REGARD TO
THE MEASUREMENT OF THE NET POWER, NET
TORQUE AND SPECIFIC FUEL CONSUMPTION
Incorporating:
00 series of amendments
Date of Entry into Force: 06.04.05
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 13.04.12

REGULATION No. 120
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF INTERNAL
COMBUSTION ENGINES TO BE INSTALLED IN AGRICULTURAL AND
FORESTRY TRACTORS AND IN NON-ROAD MOBILE MACHINERY, WITH
REGARD TO THE MEASUREMENT OF THE NET POWER, NET TORQUE
AND SPECIFIC FUEL CONSUMPTION
REGULATION
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
CONTENTS
8. Modification and extension of approval of an engine type or engine family
9. Production definitely discontinued
10. Names and addresses of technical services responsible for conducting approval tests, and of
administrative departments
ANNEXES
Annex 1
− Essential characteristics of the internal combustion engine and general information
concerning the conduct of tests
Annex 1 − Appendix 1 − Essential characteristics of the engine/parent engine
Annex 1 − Appendix 2 − Essential characteristics of the engine family
Annex 1 − Appendix 3 − Essential characteristics of engine type within the family
Annex 2
Annex 3
− Communication concerning the approval or extension or refusal or withdrawal of
approval or production definitely discontinued of an engine or engine family pursuant to
Regulation No. 120
− Arrangement of approval marks

REGULATION NO. 120
1. SCOPE
1.1. This Regulation applies to the representation of the curves as a function of engine speed of
the power, torque and specific fuel consumption at full load, indicated by the manufacturer
for internal combustion engines to be used:
1.1.1. in category T vehicles ,
1.1.2. in machinery intended and suited to move, or to be moved on the ground, with or without
road, operated under intermittent or constant speed.
1.2. The internal combustion engines belong to one of the following categories:
1.2.1. Reciprocating internal combustion engines (positive-ignition or compression-ignition), but
excluding free piston engines;
1.2.2. Rotary piston engines (positive-ignition or compression-ignition).
2. DEFINITIONS
2.1. "Approval of an engine" means the approval of an engine type with regard to its net power
measured in accordance with the procedure specified in Annex 4 to this Regulation;
2.2. "Approval of an engine family" means the approval of the members of an engine family
with regard to their net power in accordance with the procedure specified in Annexes 5 or 6
to this Regulation;
2.3. "Engine type" means a category of engines which do not differ in such essential engine
characteristics as defined in Annex 1 - Appendix 3;
2.4. "Engine family" means a manufacturer's grouping of engines which, through their design,
fulfil the grouping criteria laid down in Annex 5 to this Regulation;
2.5. "Parent engine" means an engine selected from an engine family in such a way that it
complies with requirements set out in Annex 5 of this Regulation;
2.6. "Net power" means the power obtained on a test bench at the end of the crankshaft or its
equivalent at the corresponding engine speed with the auxiliaries and equipment listed in
Table 1 of Annex 4 to this Regulation, determined under reference atmospheric conditions;
2.7. "Rated net power" means engine net power as declared by the manufacturer at rated
speed;
2.8. "Maximum net power" means the maximum value of the net power measured at full
engine load;
2.9. "Rated speed" means the maximum full load speed allowed by the governor, as specified
by the manufacturer;

4.4. There shall be affixed, conspicuously and in a readily accessible place as specified on the
approval form, to every engine conforming to an engine type or an engine family approved
under this Regulation an international approval mark consisting of:
4.4.1. A circle surrounding the letter "E" followed by the distinguishing number of the country which
has granted approval;
4.4.2. The number of this Regulation, followed by the letter "R", a dash and the approval number
to the right of the circle prescribed in Paragraph 4.4.1.
Alternatively, instead of affixing these approval marks and symbols to the engine, the
manufacturer may decide that engine approved under this Regulation shall be accompanied
by a document giving this information in order to enable the approval marks and symbol
to be attached to the vehicle.
4.5. If the engine conforms to an approved type or family under one or more other Regulations
annexed to the Agreement, in the country which has granted approval under this
Regulation, the symbol prescribed in Paragraph 4.4.1. need not be repeated; in such a case
the Regulation and approval numbers and the additional symbols of all the Regulations
under which approval has been granted under this Regulation shall be placed in vertical
columns to the right of the symbol prescribed in Paragraph 4.4.1.
4.6. The approval mark shall be placed close to or on the data plate affixed by the manufacturer
to the approved type.
4.7. Annex 3 to this Regulation gives examples of arrangements of approval marks.
4.8. Every engine conforming to an engine type or an engine family approved under this
Regulation must bear, in addition to the approval mark:
4.8.1. the trademark or trade name of the manufacturer of the engine;
4.8.2. the manufacturer’s engine code.

5.2.3.3.2. In the case of an engine without self-adaptive fuelling:
The fuel used shall be the one available on the market with the Wobbe Index at least
52.6 MJm- (20 °C, 101.3 kPa). In case of dispute the fuel used shall be the reference fuel
GR specified in Annex 7, i.e. the fuel with the highest Wobbe Index, or
5.2.3.3.3. In the case of an engine labelled for a specific range of fuels:
The fuel used shall be the one available on the market with the Wobbe Index at least
52.6 MJm (20 °C, 101.3 kPa) if the engine is labelled for the H-range of gases, or at least
47.2 MJm (20 °C, 101.3 kPa) if the engine is labelled for the L-range of gases. In case of
dispute the fuel used shall be the reference fuel GR specified in Annex 7 if the engine is
labelled for the H-range of gases, or the reference fuel G23 if the engine is labelled for the
L-range of gases, i.e. the fuel with the highest Wobbe Index for the relevant range, or
5.2.3.3.4. In the case of an engine labelled for one specific fuel composition:
The fuel used shall be the fuel for which the engine is labelled.
5.2.3.3.5. The fuel used shall be specified in the test report.
5.2.3.4. For compression-ignition engines:
The fuel used shall be the reference fuel specified in Annex 7.
The choice of the test fuel shall be made based on the exhaust limit values that the engine
type or the engine family is intended to comply with. Based on the power bands described
in the Regulation setting uniform provisions concerning the approval of compression ignition
(C.I.) engines to be installed in agricultural and forestry tractors and in non-road mobile
machinery with regard to the emissions of pollutants by the engine, the reference fuel shall
be selected as follows:
Annex 7 – Table 1 for power bands D to G
Annex 7 – Table 2 for power bands H to K
Annex 7 – Table 3 for power bands L to R.
Optionally, the reference fuel specified in Annex 7 - Table 1 may be used for power bands
H to K.
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 determine the net
power, as listed in the appendix to Annex 4 to this Regulation together with the
characteristics of the engine, as listed in Annex 1 to this Regulation.
W = H
×
ρ
/ ρ

8. MODIFICATION AND EXTENSION OF APPROVAL OF AN ENGINE TYPE OR ENGINE
FAMILY
8.1. Every modification of an engine type or an engine family with regard to the characteristics in
Annex 1, shall be notified to the administrative department which approved the engine type
or engine family. The department may then either:
8.1.1. Consider that the modifications made are unlikely to have any appreciable adverse effect
and that in any case the engine still complies with the requirements; or
8.1.2. Require a further test report from the technical service responsible for conducting the tests.
8.2. Confirmation or refusal of approval, specifying the alterations shall be communicated by the
procedure specified in Paragraph 4.3. above to the Parties to the Agreement applying this
Regulation.
8.3. The competent authority issuing the extension of approval shall assign a series number for
such an extension and inform thereof the other Parties to the 1958 Agreement applying this
Regulation by means of a communication form conforming to the model in Annex 2 to this
Regulation.
9. PRODUCTION DEFINITELY DISCONTINUED
If the holder of an approval completely ceases to manufacture an engine type or an engine
family approved in accordance with this Regulation, he shall so inform the 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 2 to this Regulation.
10. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
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 administrative departments which grant approval, and
to which forms certifying approval or extension or refusal of approval, issued in other
countries, are to be sent.

2. Attachments
2.1. Essential characteristics of the parent engine(s) (see Appendix 1) ...........................................
...................................................................................................................................................
2.2. Essential characteristics of the engine family (see Appendix 2) ................................................
...................................................................................................................................................
2.3. Essential characteristics of engine types within the family (see Appendix 3) ............................
...................................................................................................................................................
3. Characteristics of engine-related parts of the mobile machinery (if applicable) ........................
...................................................................................................................................................
4. Photographs of the parent engine ..............................................................................................
5. List of further attachments:
5.1. Appendix 1/Appendix 2/Appendix 3
5.2. Declared power, torque and specific fuel consumption curves for engine/parent engine and
engines within the family
5.3. Any further attachments, if any: .................................................................................................

1.13. Temperature Permitted by the Manufacturer
1.13.1. Liquid cooling: maximum temperature at outlet: ...................................................................... K
1.13.2. Air cooling: reference point: .......................................................................................................
1.13.3. Maximum temperature at reference point: ............................................................................... K
1.13.4. Maximum charge air outlet temperature at the inlet inter-cooler (if applicable):
................................................................................................................................................. K
1.13.5. Maximum exhaust temperature at the point in the exhaust pipe(s) adjacent to the outer
flange(s) of the exhaust manifold(s): ........................................................................................ K
1.13.6.
Lubricant temperature:
minimum: .................................................................... K
maximum: ................................................................... K
1.14. Pressure charger: yes/no
1.14.1. Make: .........................................................................................................................................
1.14.2. Type: ..........................................................................................................................................
1.14.3. Description of the system (e.g. max. charge pressure, waste-gate, if applicable): ...................
1.14.4. Inter-cooler: yes/no
1.15. Intake system: maximum allowable intake depression at rated engine speed and at 100%
load: ..................................................................................................................................... kPa
1.16. Exhaust system: maximum allowable exhaust back-pressure at rated engine speed and at
100% load: ........................................................................................................................... kPa
2. ADDITIONAL ANTI-POLLUTION DEVICES (if any, and if not covered by another heading)
2.1. Description and/or diagram(s): ...................................................................................................
3. FUEL FEED FOR COMPRESSION-IGNITION ENGINES
3.1. Feed pump
3.1.1. Pressure or characteristic diagram : ................................................................................. kPa
3.2. Injection system
3.2.1. Pump
3.2.1.1. Make(s): .....................................................................................................................................
3.2.1.2. Type(s): ......................................................................................................................................

3.3.4.4. Further documentation: ..............................................................................................................
4. FUEL FEED FOR POSITIVE-IGNITION ENGINES
4.1. Carburettor
4.1.1. Make(s): .....................................................................................................................................
4.1.2. Type(s): ......................................................................................................................................
4.2. Port fuel injection: single-point or multi-point
4.2.1. Make(s): .....................................................................................................................................
4.2.2. Type(s): ......................................................................................................................................
4.3. Direct-injection
4.3.1. Make(s): .....................................................................................................................................
4.3.2. Type(s): ......................................................................................................................................
4.4. Fuel flow [g/h] and air/fuel ratio at rated speed and wide open throttle: ....................................
4.5 Electronic Engine Management Control Unit: ............................................................................
4.5.1. Make(s): .....................................................................................................................................
4.5.2. Type: ..........................................................................................................................................
4.5.3. Emission related adjustment possibilities: .................................................................................
4.5.4. Further documentation: ..............................................................................................................
5. VALVE TIMING
5.1. Maximum lift and angles of opening and closing in relation to dead centres or equivalent
data: ...........................................................................................................................................
5.2. Reference and/or setting ranges : ...........................................................................................
5.3. Variable valve timing system (if applicable and where: intake and/or exhaust) : ...................
5.3.1. Type: continuous or on/off
5.3.2. Cam phase shift angle: ..............................................................................................................
6. PORTING CONFIGURATION
6.1. Position, size and number: .........................................................................................................

ANNEX 1 − APPENDIX 2
ESSENTIAL CHARACTERISTICS OF THE ENGINE FAMILY
1. COMMON PARAMETERS
1.1. Combustion cycle: ......................................................................................................................
1.2. Cooling medium: ........................................................................................................................
1.3. Method of air aspiration: ............................................................................................................
1.4. Combustion chamber type/design: ............................................................................................
...................................................................................................................................................
1.5. Valve and porting 3/4 configuration, size and number: ..............................................................
...................................................................................................................................................
1.6. Fuel system: ...............................................................................................................................
1.7. Engine management systems
Proof of identity pursuant to drawing number(s): .......................................................................
...................................................................................................................................................
1.7.1. charge cooling system: ..............................................................................................................
1.7.2. exhaust gas recirculation : ......................................................................................................
1.7.3. water injection/emulsion : ........................................................................................................
1.7.4. air injection : ............................................................................................................................
1.8. Proof of identical (or lowest for the parent engine) ratio: system capacity/fuel delivery per stroke,
pursuant to diagram number(s) :
...................................................................................................................................................

ANNEX 1 − APPENDIX 3
ESSENTIAL CHARACTERISTICS OF ENGINE TYPE WITHIN THE FAMILY
1. DESCRIPTION OF THE ENGINE
1.1. Manufacturer: .............................................................................................................................
1.2. Manufacturer's engine code: ......................................................................................................
1.3. Cycle: four-stroke/two-stroke
1.4. Bore : ................................................................................................................................. mm
1.5. Stroke : .............................................................................................................................. mm
1.6. Number, layout and firing order of cylinders: .............................................................................
1.7. Engine capacity : ............................................................................................................... cm
1.8. Rated speed: ...................................................................................................................... min
1.9. Maximum torque speed: .................................................................................................... min
1.10. Volumetric compression ratio : ................................................................................................
1.11. Combustion system description: ................................................................................................
1.12. Drawing(s) of combustion chamber and piston crown: ..............................................................
...................................................................................................................................................
1.13. Minimum cross-sectional area of inlet and outlet ports: .............................................................
1.14. Cooling system: liquid/air
1.14.1. Liquid
1.14.1.1. Nature of liquid: ..........................................................................................................................
1.14.1.2. Circulating pump(s): yes/no
1.14.1.3. Characteristics or make(s) and type(s) (if applicable): ..............................................................
...................................................................................................................................................
1.14.1.4. Drive ratio(s) (if applicable): .......................................................................................................

3. FUEL FEED FOR COMPRESSION-IGNITION ENGINES
3.1. Feed pump
Pressure
or characteristic diagram: ................................................................................. kPa
3.2. Injection system
3.2.1. Pump
3.2.1.1. Make(s): .....................................................................................................................................
3.2.1.2. Type(s): ......................................................................................................................................
3.2.1.3. Maximum fuel delivery: ...... mm per stroke or cycle at full injection at pump speed of:
....... min (rated) and .......min (maximum torque) respectively, or characteristic diagram: ...
...................................................................................................................................................
3.2.1.3.1. Mention the method used: on engine/on pump bench
3.2.1.4. Injection advance
3.2.1.4.1. Injection advance curve : ........................................................................................................
3.2.1.4.2. Timing : ....................................................................................................................................
3.2.2. Injection piping
3.2.2.1. Length: ................................................................................................................................. mm
3.2.2.2. Internal diameter: ................................................................................................................. mm
3.2.3. Injector(s)
3.2.3.1. Make(s): .....................................................................................................................................
3.2.3.2. Type(s): ......................................................................................................................................
3.2.3.3. Opening pressure or characteristic diagram : ................................................................ kPa
3 2.4. Governor
3.2.4.1. Make(s): .....................................................................................................................................
3.2.4.2. Type(s): ......................................................................................................................................
3.2.4.3. Speed at which cut-off starts under full load : ................................................................. min
3.2.4.4. Maximum no-load speed : ............................................................................................... min
3.2.4.5. Idling speed : ................................................................................................................... min

5. VALVE TIMING
5.1. Maximum lift and angles of opening and closing in relation to dead centers or equivalent
data: ...........................................................................................................................................
5.2. Reference and/or setting range : ............................................................................................
5.3. Variable valve timing system (if applicable and where: intake and/or exhaust) :
...................................................................................................................................................
5.3.1. Type: continuous or on/off
5.3.2. Cam phase shift angle: ..............................................................................................................
6. PORTING CONFIGURATION
6.1. Position, size and number: .........................................................................................................
7. IGNITION SYSTEM
7.1. Ignition coil
7.1.1. Make(s): .....................................................................................................................................
7.1.2. Type(s): ......................................................................................................................................
7.1.3. Number
7.2. Spark plug(s)
7.2.1. Make(s): .....................................................................................................................................
7.2.2. Type(s): ......................................................................................................................................
7.3. Magneto
7.3.1. Make(s): .....................................................................................................................................
7.3.2. Type(s): ......................................................................................................................................
7.4. Ignition timing
7.4.1. Static advance with respect to Top Dead Center [crank angle degrees]: ..................................
7.4.2. Advance curve, if applicable: .....................................................................................................

7. Date of report issued by that service: ........................................................................................
8. Number of report issued by that service: ...................................................................................
9. Location and method of affixing of the ECE approval mark: .....................................................
10. Reason(s) for extension of approval (if applicable): ..................................................................
...................................................................................................................................................
11. Main specification of internal combustion engine
11.1. Approved data
11.1.1. Rated net power: ...................................................... kW, at ............................................... min
11.1.2. Maximum net power: ................................................ kW, at ............................................... min
11.1.3. Maximum net torque: .............................................. Nm, at ............................................... min
11.1.4. Rated speed: ................................. min Rated net power: .................................................. kW
11.2. Essential characteristics of the engine type/parent engine type: ...............................................
...................................................................................................................................................
11.2.1. Operating principle:
11.2.1.1. Positive-ignition/compression-ignition
11.2.1.2. four-stroke/two-stroke
11.2.2. Number, layout and firing order of cylinders: .............................................................................
11.2.3. Cylinder capacity: ................................................................................................................. cm
11.2.4. Fuel feed: carburettor/indirect injection/direct injection
11.2.5. Pressure-charger device: Yes/No
11.2.6. Exhaust after-treatment device: Yes/No
11.3. Engine fuel requirements: leaded petrol/unleaded petrol/diesel fuel/NG / LPG:
11.4. Restriction of use:
11.4.1. Particular conditions to be respected in the installation of the engine(s) on the machinery
11.4.1.1. Maximum allowable intake depression: ............................................................................... kPa
11.4.1.2. Maximum allowable back-pressure: ..................................................................................... kPa
11.4.2. Any other (if applicable): ............................................................................................................

ANNEX 3
ARRANGEMENTS OF APPROVAL MARKS
Model A
(see Paragraph 4.4. of this Regulation)
The above approval mark affixed to an engine shows that the engine type concerned has been approved
in the Netherlands (E4) with regard to the measurement of the net power, pursuant to Regulation
No. 120 and under the approval number 002492. The approval number indicates that the approval was
granted in accordance with the requirements of Regulation No. 120 in its original form.
Model B
(see Paragraph 4.5. of this Regulation)
The above approval mark affixed to an engine shows that the engine type concerned has been approved
in the Netherlands (E4) pursuant to Regulations No. 120 and 96 . The first two digits of the approval
numbers indicate that, at the dates when the respective approvals were granted, Regulation No. 120 had
not been modified, and Regulation No. 96 already included the 02 series of amendments.

TABLE 1
EQUIPMENT AND AUXILIARIES TO BE INSTALLED
FOR THE TEST TO DETERMINE ENGINE POWER
Number Equipment and auxiliaries Fitted for emission test
1 Inlet system
Inlet manifold
Crankcase emission control system
Control devices for dual induction inlet
manifold system
Air flow meter
Air inlet duct work
Air filter
Inlet silencer
Speed-limiting device
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.
Yes.
Yes.
Yes.
Yes.
2
Induction-heating device of inlet manifold
Yes, standard production equipment. If possible
to be set in the most favourable condition.
3 Exhaust system
Exhaust purifier
Exhaust manifold
Connecting pipes
Silencer
Tail pipe
Exhaust brake
Pressure charging device
Yes, standard production equipment.
Yes, standard production equipment.
Yes.
Yes.
Yes.
No.
Yes, standard production equipment.
4 Fuel supply pump Yes, standard production equipment.
5 Carburation equipment
Carburettor
Electronic control system, air flow meter, etc.
Equipment for gas engines
Pressure reducer
Evaporator
Mixer
6 Fuel injection equipment (petrol and diesel)
Pre-filter
Filter
Pump
High-pressure pipe
Injector
Air inlet valve
Electronic control system, air flow meter, etc.
Governor/control system
Automatic full-load stop for the control rack
depending on atmospheric conditions
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production or test bed equipment
Yes, standard production or test bed equipment
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.
Yes, standard production equipment.

The compete exhaust system shall be fitted as provided for the intended application:
(i)
(ii)
(iii)
where there is a risk of an appreciable effect on the engine power;
in the case of naturally aspirated spark ignition engines;
when the manufacturer requests that this should be done.
In other cases, an equivalent system may be installed provided the pressure measured does not
differ by more than 1,000 Pa from the upper limit specified by the manufacturer.
If an exhaust brake is incorporated in the engine, the throttle valve shall be fixed in the fully open
position.
The fuel feed pressure may be adjusted, if necessary, to reproduce the pressure existing in the
particular engine application (particularly when a "fuel return" system is used).
The air intake valve is the control valve for the pneumatic governor of the injection pump. The
governor or the fuel injection equipment may contain other devices which may affect the amount of
injected fuel.
The cooling-liquid circulation shall be operated by the engine water pump only. Cooling of the
liquid may be produced by an external circuit, such that the pressure loss of this circuit and the
pressure at the pump inlet remain substantially the same as those of the engine cooling system.
The thermostat may be fixed in the fully open position.
When the cooling fan or blower is fitted for the test, the power absorbed shall be added to the
results, except for engines where such auxiliaries are an integral part of the engine (i.e.: cooling
fans of air cooled engines directly fitted on the crankshaft). The fan or blower power shall be
determined at the speeds used for the test either by calculation from standard characteristics or by
practical tests.
Minimum power of the generator: the electrical power of the generator shall be limited to that
necessary for operation of accessories which are indispensable for engine operation. If the
connection of a battery is necessary, a fully charged battery in good condition shall be used.
Charge air-cooled engines shall be tested with charge air cooling, whether liquid - or air-cooled,
but if the manufacturer prefers, a test bench system may replace the air cooler. In either case, the
measurement of power at each speed shall be made with the maximum pressure drop and the
minimum temperature drop of the engine air across the charge air cooler on the test bench system
as those specified by the manufacturer.
These may include, for example, exhaust-gas recirculation (EGR system , catalytic converter,
thermal reactor, secondary air-supply system and fuel evaporation protecting system.
The power for electrical or other starting systems shall be provided from the test bed.

3.7. The engine speed during a run or reading shall not deviate from the selected speed by more
than ± 1% or ± 10 min, whichever is greater.
3.8. 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.
3.9. 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 353 K ± 5 K.
For air-cooled engines, the temperature at a point indicated by the manufacturer shall be
kept within +0/-20 K of the maximum value specified by the manufacturer in the reference
conditions.
3.10. For C.I. engines, the fuel temperature shall be measured at the inlet of the fuel injection
pump and maintained within 306−316 K (33−43 °C) for positive-ignition engines the fuel
temperature shall be measured as near as possible to the inlet of the carburettor or
assembly of fuel injectors and maintained within 293−303 K (20-30 °C).
3.11. The temperature of the lubricating oil measured in the oil pump or at the outlet from the coil
cooler, if fitted, shall be maintained within the limits established by the engine manufacturer.
3.12. An auxiliary regulating system may be used if necessary to maintain the temperatures within
the limits specified in Paragraphs 3.9., 3.10. and 3.11. above of this Annex.
4. ACCURACY OF MEASUREMENTS
4.1. Torque: ± 1% of measured torque. The torque measuring system shall be calibrated to take
friction losses into account. The accuracy in the lower half of the measuring range of the
dynamometer bench may be ± 2% of measured torque.
4.2. Engine speed: 0.5% of measured speed.
4.3. Fuel consumption: ± 1% of measured consumption.
4.4. Fuel temperature: ± 2 K.
4.5. Engine inlet air temperature: ± 2 K.
4.6. Barometric pressure: ± 100 Pa.
4.7. Depression in inlet system: ± 50 Pa.
4.8. Back-pressure in exhaust system: ± 200 Pa.

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

× ⎜

T
298



where:
p
T
is the total dry atmospheric pressure in kilopascals (kPa); i.e. 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 must be such that
0.96 < α < 1.06
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. Compression-ignition engines - factor α
The power correction factor (α ) for compression-ignition engines at constant fuel rate is
obtained by applying the formula:
where:
α = (f )
f
f
is the atmospheric factor
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.

For q values higher than 65 mg/(l.cycle), a constant value of f equal to 1.2 (f = 1.2) will be
taken (see Figure):
5.4.2.3. Conditions to be complied with in the laboratory
For a test to be valid, the correction factors 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.

2.3.
For compression-ignition engines operating on gaseous fuels
2.3.1.
Feed system: gas
2.3.2.
Specification of gas used: ..........................................................................................................
2.3.3.
Fuel oil/gas proportion: ..............................................................................................................
2.3.4.
Lower calorific value:..................................................................................................................
2.4.
For compression-ignition engines operating on liquid fuel
2.4.1.
Make: .........................................................................................................................................
2.4.2.
Specification of fuel used: ..........................................................................................................
2.4.3.
Cetane number (ASTM D 976-71): ............................................................................................
2.4.4.
Specify density: .................................................................................................. g/cm at 288 K
2.4.5.
Lower calorific value:.......................................................................................................... kJ/kg
3.
LUBRICANT
3.1.
Make: .........................................................................................................................................
3.2.
Specification: ..............................................................................................................................
3.3.
SAE viscosity: ............................................................................................................................

ANNEX 5
ESSENTIAL CHARACTERISTICS OF THE ENGINE FAMILY
1. PARAMETERS DEFINING THE ENGINE FAMILY
The engine family may be defined by basic design parameters which must be common to
engines within the family. In some cases there may be interaction of parameters. These
effect must also be taken into consideration to ensure that only engines with similar exhaust
emission characteristics are included within an engine family.
In order that engines be considered to belong to the same engine family, the following list of
basic parameters must be common:
1.1. Combustion Cycle
four-stroke
two-stroke
1.2. Cooling Medium
air
water
oil
1.3. Individual Cylinder Displacement
Individual cylinder displacement, within 85 and 100% of the largest displacement within the
engine family.
1.4. Method of Air Aspiration
naturally aspirated
pressure-charged
1.5. Fuel Type
diesel
petrol
gaseous fuel (NG or LPG)
1.6. Combustion Chamber Type/Design
pre-chamber
swirl chamber
open chamber
1.7. Valve and Porting 3/4 Configuration, Size and Number
cylinder head
cylinder wall
crankcase

ANNEX 6
CHECKS ON CONFORMITY OF PRODUCTION
1. GENERAL
These requirements are consistent with tests to be held to check conformity of production
(COP), according to Paragraph 6.2. of this Regulation.
2. TEST PROCEDURES
The methods of testing and measuring instruments shall be those described in Annex 4 to
this Regulation.
3. COLLECTION OF SAMPLES
3.1. Case of an Engine Type
One engine has to be chosen. If after the test of Paragraph 5.1. below, the engine is not
considered as conforming to the requirements of this Regulation, two more engines have to
be tested.
3.2. Case of a Family of Engines
In case of an approval granted to a family of engines the COP shall be run on one member
of the family, which is not the parent engine. In case of failure of the COP test, the two more
engines shall be of the same member type.
4. MEASUREMENT CRITERIA
4.1. Net power and specific fuel consumption of internal combustion engine
Measurements shall be taken at a sufficient number of engine speeds to define correctly the
power, torque and specific fuel consumption curves between the lowest and the highest
engine speeds recommended by the manufacturer as defined in Paragraphs 2.9. and 2.11.
of this Regulation.
The values measured by the technical service for the engine sampled shall not differ by
more than ± 5% for the net power (torque), and ± 10% for the specific fuel consumption, at
all measurement points on the curve with a tolerance of ± 5% for engine speed.
5. EVALUATION OF RESULTS
If the net power and fuel consumption figures of the second and/or third engine of
Paragraph 3. do not fulfil the requirements of Paragraph 4. above, the production shall be
considered not to conform to the requirements of this Regulation and the provision of
Paragraph 7 of this Regulation shall be put into effect.

2. Technical data of NG reference fuels
European market fuels are available in two ranges:
− the H range, whose extreme reference fuels are GR and G23;
− the L range, whose extreme reference fuels are G23 and G25.
The characteristics of GR, G23 and G25 reference fuels are summarised below:
Reference fuel GR
Characteristics Units Basis
Composition:
Minimum
Limits
Maximum
Test Method
Methane
87
84
89
Ethane
13
11
15
Balance *
%-mole


1
ISO 6974
Sulphur content
mg/m **


10
ISO 6326-5
Reference fuel G23
Characteristics Units Basis
Composition:
Minimum
Limits
Maximum
Test Method
Methane
92.5
91.5
93.5
Balance *
%-mole


1
ISO 6974
N 2
7.5
6.5
8.5
Sulphur content
mg/m **


10
ISO 6326-5

4. Reference fuel for compression-ignition engines
Table 1
Agricultural and Forestry Tractors and Non-road Mobile Machinery Reference Fuel
for CI Engines Type Approved to Meet Limit Values of Power Bands D to G
Cetane number Minimum 45
Maximum 50
Density at 15° C
Limits and units
Minimum 835 kg/m
Maximum 845 kg/m
ISO 5165
Distillation – 95% point Maximum 370° C ISO 3405
Viscosity at 40° C Minimum 2.5 mm /s
Maximum 3.5 mm /s
Sulphur content
Minimum 0.1% mass
Maximum 0.2% mass
Test method
ISO 3675, ASTM D 4052
ISO 3104
Flash point Minimum 55° C ISO 2719
CFPP Minimum – Maximum + 5° C EN 116
Copper corrosion Maximum 1 ISO 2160
ISO 8754, EN 24260
Conradson carbon residue (10% DR) Maximum 0.3% mass ISO 10370
Ash content Maximum 0.01% mass ASTM D 482
Water content Maximum 0.05% mass ASTM D 95, D 1744
Neutralization(strong acid) number
Minimum 0.20 mg KOH/g
Oxidation stability Maximum 2.5 mg/100 ml ASTM D 2274
Additives

Table 2
Agricultural and Forestry Tractors and Non-road Mobile Machinery Reference Fuel
for CI Engines Type Approved to Meet Limit Values of Power Bands H to K
Parameter
Unit
Minimum
Limits
Maximum
Test Method
Cetane number 52.0 54.0 EN-ISO 5165
Density at 15° C kg/m 833 837 EN-ISO 3675
Distillation:
50% point °C 245 – EN-ISO 3405
95% point °C 345 350 EN-ISO 3405
Final boiling point °C – 370 EN-ISO 3405
Flash point °C 55 – EN 22719
CFPP °C – -5 EN 116
Viscosity at 40° C mm /s 2.5 3.5 EN-ISO 3104
Polycyclic aromatic
hydrocarbons
% m/m 3.0 6.0 IP 391
Sulphur content mg/kg – 300 ASTM D 5453
Copper corrosion – Class 1 EN-ISO 2160
Conradson carbon residue
(10% DR)
% m/m – 0.2 EN-ISO 10370
Ash content % m/m – 0.01 EN-ISO 6245
Water content % m/m – 0.05 EN-ISO 12937
Neutralization (strong acid)
number
mg KOH/g – 0.02 ASTM D 974
Oxidation stability mg/ml – 0.025 EN-ISO 12205

Net Power, Torque and Fuel Consumption.