ANNEX I U.K. ADMINISTRATIVE PROVISIONS FOR EC TYPE-APPROVAL

5. REQUIREMENTS AND TESTS FOR IN-SERVICE TESTING U.K.

5.1. Introduction U.K.

This Section sets out the specifications and tests of the ECU data at type-approval for the purpose of in-service testing.

5.2. General Requirements U.K.

5.2.1 For the purpose of in-service testing, the calculated load (engine torque as a percentage of maximum torque and the maximum torque available at the current engine speed), the engine speed, the engine coolant temperature, the instantaneous fuel consumption, and the reference maximum engine torque as a function of engine speed shall be made available by the OBD system in real time and at a frequency of at least 1 Hz, as mandatory data stream information. U.K.

5.2.2. The output torque may be estimated by the ECU using built-in algorithms to calculate the produced internal torque and the friction torque. U.K.

5.2.3 The engine torque in Nm resulting from the above data stream information shall permit a direct comparison with the values measured when determining the engine power according to Annex XIV. In particular, any eventual corrections as regards auxiliaries shall be included in the above data stream information. U.K.

5.2.4. Access to the information required in point 5.2.1 shall be provided in accordance with the requirements set out in Annex X and with the standards referred to in Appendix 6 to Annex 9B to UN/ECE Regulation No 49. U.K.

5.2.5. The average load at each operating condition in Nm calculated from the information requested in point 5.2.1 shall not differ from the average measured load at that operating condition by more than: U.K.

(a)

7 % when determining the engine power according to Annex XIV;

(b)

10 % when performing the World Harmonised Steady state Cycle (hereinafter ‘WHSC’) test according to Annex III.

The UN/ECE Regulation No 85(1) allows the actual maximum load of the engine to differ from the reference maximum load by 5 % in order to address the manufacturing process variability. This tolerance is taken into account in the above values.

5.2.6. External access to the information required in point 5.2.1 shall not influence the vehicle emissions or performance. U.K.

5.3. Verification of the availability and conformity of the ECU information required for in-service testing U.K.

5.3.1. The availability of the data stream information required in point 5.2.1 according to the requirements set out in point 5.2.2 shall be demonstrated by using an external OBD scan-tool as described in Annex X. U.K.

5.3.2. In the case where this information cannot be retrieved in a proper manner, using a scan-tool that is working properly, the engine is considered as non-compliant. U.K.

5.3.3. The conformity of the ECU torque signal to the requirements of points 5.2.2 and 5.2.3 shall be demonstrated when determining the engine power according to Annex XIV and when performing the WHSC test according to Annex III. U.K.

5.3.4. In the case where the engine under test does not match the requirements set out in Annex XIV concerning auxiliaries, the measured torque shall be corrected in accordance to the correction method set out in Annex 4B to UN/ECE Regulation No 49. U.K.

5.3.5. The conformity of the ECU torque signal is considered to be demonstrated if the torque signal remains within the tolerances set out in point 5.2.5. U.K.

(1)

OJ L 326, 24.11.2006, p. 55.