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Commission Regulation (EU) 2017/2400 of 12 December 2017 implementing Regulation (EC) No 595/2009 of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles and amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EU) No 582/2011 (Text with EEA relevance)
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Torque loss measurement according to this Annex by following the full procedure limited to the grid points described in 6.2.
Torque loss measurement according to this Annex by following the full procedure limited to the grid points described in 6.2, with exception of the run-in procedure. In order to consider the run-in characteristic of an axle, a corrective factor may be applied. This factor shall be determined according to good engineering judgement and with agreement of the approval authority.
Measurement of drag torque according to paragraph 6.3. The manufacturer may choose a run-in procedure according to good engineering judgement up to 100 h.
The control areas shall be selected depending on the axle line:
SR axles including tandem combinations: Control areas 5, 6, 8 and 9
HR axles including tandem combinations: Control areas 2, 3, 4 and 5
The selected point shall be located in the centre of the area referring to the speed range and the applicable torque range for the according speed.
In order to have a corresponding point for comparison with the loss map measured for certification, the selected point shall be moved to the closest measured point from the approved map.
where:
=
Efficiency of the grid point from each single control area 1 to 9
=
Output torque [Nm]
=
Input torque [Nm]
=
axle ratio [-]
For SR axles:
For HR axles:
where:
=
average efficiency for low speed
=
average efficiency for mid speed
=
average efficiency for high speed
=
simplified averaged efficiency for axle
If a torque loss measurement according to 6.1(a) or (b) is conducted, the average efficiency of the tested axle during conformity of the certified CO2 emissions and fuel consumption related properties procedure shall not deviate more than 1,5 % for SR axles and 2,0 % for all other axles lines from corresponding average efficiency the type approved axle.
If a measurement of drag torque according to 6.1(c) is conducted, the deviation of the drag torque of the tested axle during conformity of the certified CO2 emissions and fuel consumption related properties procedure shall not be higher than indicated in table 2
Axleline | Tolerances for axles measured in CoP after run-inComparison to Td0 | Tolerances for axles measured in CoP without run inComparison to Td0 | ||||||
---|---|---|---|---|---|---|---|---|
for i | tolerance Td0_input [Nm] | for i | tolerance Td0_input [Nm] | for i | tolerance Td0_input Nm] | for i | tolerance Td0_input [Nm] | |
SR | ≤ 3 | 15 | > 3 | 12 | ≤ 3 | 25 | > 3 | 20 |
SRT | ≤ 3 | 16 | > 3 | 13 | ≤ 3 | 27 | > 3 | 21 |
SP | ≤ 6 | 11 | > 6 | 10 | ≤ 6 | 18 | > 6 | 16 |
HR | ≤ 7 | 10 | > 7 | 9 | ≤ 7 | 16 | > 7 | 15 |
HRT | ≤ 7 | 11 | > 7 | 10 | ≤ 7 | 18 | > 7 | 16 |
=
gear ratio.
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