ANNEX VI U.K. VERIFYING TRANSMISSION, TORQUE CONVERTER, OTHER TORQUE TRANSFERRING COMPONENT AND ADDITIONAL DRIVELINE COMPONENT DATA

8. Production conformity testing U.K.

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:

8.1 Conformity testing of transmissions U.K.

8.1.1 The transmission efficiency shall be determined following the simplified procedure described in this paragraph. U.K.

8.1.2.1 All boundary conditions as specified in this Annex for the certification testing shall apply. U.K.

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.

8.1.2.2 For the measurement the same testing option shall be used as for the certification testing, limited to the operating points specified in this paragraph. U.K.

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. U.K.

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: U.K.

(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.

8.1.2.3 For each of the 18 operating points, the efficiency of the transmission shall be calculated with: U.K.

where:

η _i

=

Efficiency of each operation point 1 to 18

T_out

=

Output torque [Nm]

T_in

=

Input torque [Nm]

n_in

=

Input speed [rpm]

n_out

=

Output speed [rpm]

8.1.2.4 The total efficiency during conformity of the certified CO₂ emissions and fuel consumption related properties testing η_A,CoP shall be calculated by the arithmetic mean value of the efficiency of all 18 operating points. U.K.

8.1.3 The conformity of the certified CO₂ emissions and fuel consumption related properties test is passed when the following condition applies: U.K.

The efficiency of the tested transmission during conformity of the certified CO₂ emissions and fuel consumption related properties test η_A,CoP shall not be lower than X % of the type approved transmission efficiency η_A,TA .

η_A,TA – η_A,CoP ≤ X

[F1 X shall be replaced by 1,5 % for SMT/AMT/DCT transmissions and 3 % for APT transmissions or transmission with more than 2 friction shift clutches.]

Textual Amendments

F1 Substituted by Commission Regulation (EU) 2019/318 of 19 February 2019 amending Regulation (EU) 2017/2400 and Directive 2007/46/EC of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles (Text with EEA relevance).