The tests shall be conducted under ambient conditions meeting the following conditions over the whole testrun:

1. (1)

   The parameter f_a describing the laboratory test conditions, determined in accordance with paragraph 6.1 of Annex 4 to UN/ECE Regulation 49 Rev.06, shall be within the following limits: 0,96 ≤ f_a ≤ 1,04.

2. (2)

   The absolute temperature (T_a) of the engine intake air expressed in Kelvin, determined in accordance with paragraph 6.1 of Annex 4 to UN/ECE Regulation 49 Rev.06 shall be within the following limits: 283 K ≤ T_a ≤ 303 K.

3. (3)

   The atmospheric pressure expressed in kPa, determined in accordance with paragraph 6.1 of Annex 4 to UN/ECE Regulation 49 Rev.06 shall be within the following limits: 90 kPa ≤ p_s ≤ 102 kPa.

If tests are performed in test cells that are able to simulate barometric conditions other than those existing in the atmosphere at the specific test site, the applicable f_a value shall be determined with the simulated values of atmospheric pressure by the conditioning system. The same reference value for the simulated atmospheric pressure shall be used for the intake air and exhaust path and all other relevant engine systems. The actual value of the simulated atmospheric pressure for the intake air and exhaust path and all other relevant engine systems shall be within the limits specified in subpoint (3).

In cases where the ambient pressure in the atmosphere at the specific test site exceeds the upper limit of 102 kPa, tests in accordance with this Annex may still be performed. In this case tests shall be performed with the specific ambient air pressure in the atmosphere.

In cases where the test cell has the ability to control temperature, pressure and/or humidity of engine intake air independent of the atmospheric conditions the same settings for those parameters shall be used for all testruns performed for the purpose of certification of one specific engine CO₂-family defined in accordance with Appendix 3 to this Annex.

The test engine shall be installed in accordance with paragraphs 6.3 to 6.6 of Annex 4 to UN/ECE Regulation 49 Rev.06.

If auxiliaries/equipment necessary for operating the engine system are not installed as required in accordance with paragraph 6.3 of Annex 4 to UN/ECE Regulation 49 Rev.06, all measured engine torque values shall be corrected for the power required for driving these components for the purpose of this Annex in accordance with paragraph 6.3 of Annex 4 to UN/ECE Regulation 49 Rev.06.

The power consumption of the following engine components resulting in the engine torque required for driving these engine components shall be determined in accordance with Appendix 5 to this Annex:

1. (1)

   fan

2. (2)

   electrically powered auxiliaries/equipment necessary for operating the engine system

In the case of a closed crankcase, the manufacturer shall ensure that the engine's ventilation system does not permit the emission of any crankcase gases into the atmosphere. If the crankcase is of an open type, the emissions shall be measured and added to the tailpipe emissions, following the provisions set out in paragraph 6.10. of Annex 4 to UN/ECE Regulation 49 Rev.06.

During all testruns the charge air cooling system used on the test bed shall be operated under conditions which are representative for in-vehicle application at reference ambient conditions. The reference ambient conditions are defined as 293 K for air temperature and 101,3 kPa for pressure.

The laboratory charge air cooling for tests according to this regulation should comply with the provisions specified in paragraph 6.2 of Annex 4 to UN/ECE Regulation 49 Rev.06.

1. (1)

   During all testruns the engine cooling system used on the test bed shall be operated under conditions which are representative for in-vehicle application at reference ambient conditions. The reference ambient conditions are defined as 293 K for air temperature and 101,3 kPa for pressure.

2. (2)

   The engine cooling system should be equipped with thermostats according to the manufacturer specification for vehicle installation. If either a non-operational thermostat is installed or no thermostat is used, subpoint (3) shall apply. The setting of the cooling system shall be performed in accordance with subpoint (4).

3. (3)

   If no thermostat is used or a non-operational thermostat is installed, the test bed system shall reflect the behavior of the thermostat under all test conditions. The setting of the cooling system shall be performed in accordance with subpoint (4).

4. (4)

   F1The engine coolant flow rate (or alternatively the pressure difference across the engine side of the heat exchanger) and the engine coolant temperature shall be set to a value representative for in-vehicle application at reference ambient conditions when the engine is operated at rated speed and full load with the engine thermostat in fully open position. This setting defines the coolant reference temperature. For all testruns performed for the purpose of certification of one specific engine within one engine CO₂-family, the cooling system setting shall not be changed, neither on the engine side nor on the test bed side of the cooling system. The temperature of the test bed side cooling medium shall be kept reasonably constant by good engineering judgement. The cooling medium on the test bed side of the heat exchanger shall not exceed the nominal thermostat opening temperatur downstream of the heat exchanger.

5. (5)

   For all testruns performed for the purpose of certification of one specific engine within one engine CO₂-family the engine coolant temperature shall be maintained between the nominal value of the thermostat opening temperature declared by the manufacturer and the coolant reference temperature in accordance with subpoint (4) as soon as the engine coolant has reached the declared thermostat opening temperature after engine cold start.

6. (6)

   For the WHTC coldstart test performed in accordance with paragraph 4.3.3, the specific initial conditions are specified in paragraphs 7.6.1. and 7.6.2 of Annex 4 to UN/ECE Regulation 49 Rev.06. If simulation of the thermostat behaviour in accordance with subpoint (3) is applied, there shall be no coolant flow across the heat exchanger as long as the engine coolant has not reached the declared nominal thermostat opening temperature after cold start.

A verification of the demanded requirements defined in Table 2 shall be performed for each measurement system. At least 10 reference values between x_min and the ‘max calibration’ value defined in accordance with paragraph 3.5 shall be introduced to the measurement system and the response of the measurement system shall be recorded as measured value.

For the linearity verification the measured values shall be compared to the reference values by using a least squares linear regression in accordance with paragraph A.3.2 of Appendix 3 to Annex 4 to UN/ECE Regulation 49 Rev.06.

The engine full load curve shall be recorded in accordance with paragraphs 7.4.1. to 7.4.5. of Annex 4 to UN/ECE Regulation 49 Rev.06.

The recording of the engine motoring curve in accordance with this paragraph shall be omitted for all other engines except the CO₂-parent engine of the engine CO₂-family defined in accordance with Appendix 3. In accordance with paragraph 6.1.3 the engine motoring curve recorded for the CO₂-parent engine of the engine CO₂-family shall also be applicable to all engines within the same engine CO₂-family.

In the case that upon request of the manufacturer the provisions defined in Article 15(5) of this Regulation are applied, the recording of the engine motoring curve shall be performed additionally for that specific engine.

The engine motoring curve shall be recorded in accordance with option (b) in paragraph 7.4.7. of Annex 4 to UN/ECE Regulation 49 Rev.06. This test shall determine the negative torque required to motor the engine between maximum and minimum mapping speed with minimum operator demand.

The test shall be continued directly after the full load curve mapping according to paragraph 4.3.1. At the request of the manufacturer, the motoring curve may be recorded separately. In this case the engine oil temperature at the end of the full load curve testrun performed in accordance with paragraph 4.3.1 shall be recorded and the manufacturer shall prove to the satisfaction of the an approval authority, that the engine oil temperature at the starting point of the motoring curve meets the aforementioned temperature within ± 2 K.

At the start of the testrun for the engine motoring curve the engine shall be operated with minimum operator demand at maximum mapping speed defined in paragraph 7.4.3. of Annex 4 to UN/ECE Regulation 49 Rev.06. As soon as the motoring torque value has stabilized within ± 5 % of its mean value for at least 10 seconds, the data recording shall start and the engine speed shall be decreased at an average rate of 8 ± 1 min^– 1/s from maximum to minimum mapping speed, which are defined in paragraph 7.4.3. of Annex 4 to UN/ECE Regulation 49 Rev.06.

The specific fuel consumption figures needed for the WHTC correction factor shall be calculated from the actual measured values for the hotstart WHTC recorded in accordance with paragraph 4.3.3 as follows:

• SFC_{meas, Urban} = Σ FC_{meas, WHTC-Urban} / W_{act, WHTC-Urban}

• SFC_{meas, Rural} = Σ FC_{meas, WHTC- Rural} / W_{act, WHTC- Rural}

• SFC_{meas, MW} = Σ FC_{meas, WHTC-MW} / W_{act, WHTC-M})

where:

SFC_{meas, i}

Specific fuel consumption over the WHTC-sub-cycle i [g/kWh]

Σ FC_{meas, i}

Total fuel mass consumed by the engine over the WHTC-sub-cycle i [g] determined in accordance with paragraph 5.2

W_{act, i}

Total engine work over the WHTC sub-cycle i [kWh] determined in accordance with paragraph 5.1

The 3 different sub-cycles of the WHTC – urban, rural and motorway – shall be defined as follows:

1. (1)

   urban: from cycle start to ≤ 900 seconds from cycle start

2. (2)

   rural: from > 900 seconds to ≤ 1 380 seconds from cycle start

3. (3)

   motorway (MW): from > 1 380 seconds from cycle start to cycle end

The specific fuel consumption figures needed for the cold-hot emission balancing factor shall be calculated from the actual measured values for both, the hotstart and coldstart WHTC test recorded in accordance with paragraph 4.3.3. The calculations shall be performed for both, the hotstart and coldstart WHTC separately as follows:

• SFC_{meas, hot} = Σ FC_{meas, hot} / W_{act, hot}

• SFC_{meas, cold} = Σ FC_{meas, cold} / W_{act, cold}

where:

SFC_{meas, j}

Specific fuel consumption [g/kWh]

Σ FC_{meas, j}

Total fuel consumption over the WHTC [g] determined in accordance with paragraph 5.2 of this Annex

W_{act, j}

Total engine work over the WHTC [kWh] determined in accordance with paragraph 5.1 of this Annex

The input data shall be the engine full load curve of the CO₂-parent engine of the engine CO₂-family defined in accordance with Appendix 3 to this Annex and recorded in accordance with paragraph 4.3.1.

In the case that upon request of the manufacturer the provisions defined in Article 15(5) of this Regulation are applied, the engine full load curve of that specific engine recorded in accordance with paragraph 4.3.1 shall be used as input data.

The input data shall be provided in the file format of ‘comma separated values’ with the separator character being the Unicode Character ‘COMMA’ (U+002C) (‘,’). The first line of the file shall be used as a header and not contain any recorded data. The recorded data shall start from the second line of the file.

The first column of the file shall be the engine speed in min^– 1 rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06. The second column shall be the torque in Nm rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06.

The input data shall be the engine full load curve of the engine recorded in accordance with paragraph 4.3.1.

The input data shall be provided in the file format of ‘comma separated values’ with the separator character being the Unicode Character ‘COMMA’ (U+002C) (‘,’). The first line of the file shall be used as a header and not contain any recorded data. The recorded data shall start from the second line of the file.

The first column of the file shall be the engine speed in min^– 1 rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06. The second column shall be the torque in Nm rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06.

The input data shall be the engine motoring curve of the CO₂-parent engine of the engine CO₂-family defined in accordance with Appendix 3 to this Annex and recorded in accordance with paragraph 4.3.2.

In the case that upon request of the manufacturer the provisions defined in Article 15(5) of this Regulation are applied, the engine motoring curve of that specific engine recorded in accordance with paragraph 4.3.2 shall be used as input data.

The input data shall be provided in the file format of ‘comma separated values’ with the separator character being the Unicode Character ‘COMMA’ (U+002C) (‘,’). The first line of the file shall be used as a header and not contain any recorded data. The recorded data shall start from the second line of the file.

The first column of the file shall be the engine speed in min^– 1 rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06. The second column shall be the torque in Nm rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06.

The input data shall be the values of engine speed, engine torque and fuel massflow determined for the CO₂-parent engine of the engine CO₂-family defined in accordance with Appendix 3 to this Annex and recorded in accordance with paragraph 4.3.5.

In the case that upon request of the manufacturer the provisions defined in Article 15(5) of this Regulation are applied, the values of engine speed, engine torque and fuel massflow determined for that specific engine recorded in accordance with paragraph 4.3.5 shall be used as input data.

The input data shall only consist of the average measurement values of engine speed, engine torque and fuel massflow over the 30 ± 1 seconds measurement period determined in accordance with subpoint (1) of paragraph 4.3.5.5.

The input data shall be provided in the file format of ‘comma separated values’ with the separator character being the Unicode Character ‘COMMA’ (U+002C) (‘,’). The first line of the file shall be used as a header and not contain any recorded data. The recorded data shall start from the second line of the file.

The first column of the file shall be the engine speed in min^– 1 rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06. The second column shall be the torque in Nm rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06. The third column shall be the fuel massflow in g/h rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06.

The input data shall be the three values for specific fuel consumption over the different sub-cycles of the WHTC – urban, rural and motorway – in g/kWh determined in accordance with paragraph 5.3.1.

The values shall be rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06.

The input data shall be the two values for specific fuel consumption over the hotstart and coldstart WHTC in g/kWh determined in accordance with paragraph 5.3.2.

The values shall be rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06.

The input data shall be the correction factor CF_RegPer determined in accordance with paragraph 5.4.

For engines equipped with exhaust after-treatment systems with continuous regeneration, defined in accordance with paragraph 6.6.1 of Annex 4 to UN/ECERegulation 49 Rev.06, this factor shall be set to 1 in accordance with paragraph5.4.

The value shall be rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06.

The input data shall be the NCV of the test fuel in MJ/kg determined in accordance with paragraph 3.2.

F1The value shall be rounded to 2 places to the right of the decimal point in accordance with ASTM E 29-06.

The input data shall be the type of the test fuel selected in accordance with paragraph 3.2.

The input data shall be the engine idle speed, n_idle, in min^– 1 of the CO₂-parent engine of the engine CO₂-family defined in accordance with Appendix 3 to this Annex as declared by the manufacturer in the application for certification in the information document drawn up in accordance with the model set out in Appendix 2.

In the case that upon request of the manufacturer the provisions defined in Article 15(5) of this Regulation are applied, the engine idle speed of that specific engine shall be used as input data.

The value shall be rounded to the nearest whole number in accordance with ASTM E 29-06.

The input data shall be the engine idle speed, n_idle, in min^– 1 of the engine as declared by the manufacturer in the application for certification in the information document drawn up in accordance with the model set out in Appendix 2 to this Annex.

The value shall be rounded to the nearest whole number in accordance with ASTM E 29-06.

The input data shall be the displacement in ccm of the engine as declared by the manufacturer at the application for certification in the information document drawn up in accordance with the model set out in Appendix 2 to this Annex.

The value shall be rounded to the nearest whole number in accordance with ASTM E 29-06.

The input data shall be the rated speed in min^– 1 of the engine as declared by the manufacturer at the application for certification in point 3.2.1.8. of the information document in accordance with Appendix 2 to this Annex.

The value shall be rounded to the nearest whole number in accordance with ASTM E 29-06.

The input data shall be the rated power in kW of the engine as declared by the manufacturer at the application for certification in point 3.2.1.8. of the information document in accordance with Appendix 2 to this Annex.

The value shall be rounded to the nearest whole number in accordance with ASTM E 29-06.

The input data shall be the name of the engine manufacturer as a sequence of characters in ISO8859-1 encoding.

The input data shall be the name of the engine model as a sequence of characters in ISO8859-1 encoding.

The input data shall be an unique identifier of the technical report compiled for the type approval of the specific engine. This identifier shall be provided as a sequence of characters in ISO8859-1 encoding.