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Commission Regulation (EU) 2017/2400Show full title
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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8.Production conformity testing
For conformity of the certified CO2 emissions and fuel consumption related properties testing the following method shall apply upon prior agreement between an approval authority and the applicant for a certificate:
8.1Conformity testing of transmissions
8.1.1The transmission efficiency shall be determined following the simplified procedure described in this paragraph.
8.1.2.1All boundary conditions as specified in this Annex for the certification testing shall apply.
If other boundary conditions for oil type, oil temperature and inclination angle are used, the manufacturer shall clearly show the influence of these conditions and those used for certification regarding efficiency.
8.1.2.2For the measurement the same testing option shall be used as for the certification testing, limited to the operating points specified in this paragraph.
8.1.2.2.1.In the case Option 1 was used for certification testing, the torque independent losses for the two speeds defined in point 3 of 8.1.2.2.2. shall be measured and used for the calculation of the torque losses at the three highest torque steps.
In the case Option 2 was used for certification testing, the torque independent losses for the two speeds defined in point 3 of 8.1.2.2.2. shall be measured. The torque dependent losses at maximum torque shall be measured at the same two speeds. The torque losses at the three highest torque steps shall be interpolated as described by the certification procedure.
In the case Option 3 was used for certification testing, the torque losses for the 18 operating points defined in 8.1.2.2.2. shall be measured.
8.1.2.2.2.The efficiency of the transmission shall be determined for 18 operating points defined by the following requirements:
(1)
Gears to use:
The 3 highest gears of the transmission shall be used for testing.
(2)
Torque range:
The 3 highest torque steps as reported for certification shall be tested.
(3)
Speed range:
The two transmission input speeds of 1 200 rpm and 1 600 rpm shall be tested.
8.1.2.3For each of the 18 operating points, the efficiency of the transmission shall be calculated with:
where:
η i
=
Efficiency of each operation point 1 to 18
Tout
=
Output torque [Nm]
Tin
=
Input torque [Nm]
nin
=
Input speed [rpm]
nout
=
Output speed [rpm]
8.1.2.4The total efficiency during conformity of the certified CO2 emissions and fuel consumption related properties testing ηA,CoP shall be calculated by the arithmetic mean value of the efficiency of all 18 operating points.
8.1.3The conformity of the certified CO2 emissions and fuel consumption related properties test is passed when the following condition applies:
The efficiency of the tested transmission during conformity of the certified CO2 emissions and fuel consumption related properties test ηA,CoP shall not be lower than X % of the type approved transmission efficiency ηA,TA .
ηA,TA – ηA,CoP ≤ X
X shall be replaced by 1,5 % for MT/AMT/DCT transmissions and 3 % for AT transmissions or transmission with more than 2 friction shift clutches.
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