Document ID: chunk:federal_register_of_legislation:F2022C00213:reg:18:p3
Version: federal_register_of_legislation:F2022C00213
Segment Type: reg
Provision Reference: reg 18 (pt 3/6)
Character Range: 350223–353044

from t0, the cycle made of four elementary urban cycles and an extra-urban cycle is run twice on a chassis dynamometer (test distance:  22 km, test duration:  40 minutes).

       At the end, the measure Dtest of the covered distance in km is recorded.

      2.4.3. Charge of the battery

       The vehicle shall be connected to the mains within the 30 minutes after the conclusion of the cycle made of four elementary urban cycles and an extra-urban cycle, carried out twice.

       The vehicle shall be charged according to normal overnight charge procedure (see paragraph 2.4.1.2. to this annex).

       The energy measurement equipment, placed between the mains socket and the vehicle charger, measures the charge energy E delivered from the mains, as well as its duration.

       Charging is stopped after 24 hours from the previous end of charging time (t0).

       Note:
       In case of a mains power cut, the 24 hours period will be extended accordingly to the cut duration.  Validity of the charge will be discussed between the technical services of the approval laboratory and the vehicle's manufacturer.

      2.4.4. Electric energy consumption calculation

       Energy E in Wh and charging time measurements are recorded in the test report.

       The electric energy consumption c is defined by the formula:

       where Dtest is the distance covered during the test (km).

Annex 7 - Appendix

DETERMINATION OF THE TOTAL ROAD LOAD POWER
OF A VEHICLE POWERED BY AN ELECTRIC POWER TRAIN ONLY,
AND CALIBRATION OF THE DYNAMOMETER

         1.  INTRODUCTION

           The purpose of this appendix is to define the method of measuring the total road load power of a vehicle with a statistical accuracy of ± 4 per cent at a constant speed and to reproduce this measured road load power on a dynamometer with an accuracy of ± 5 per cent.

         2.  CHARACTERISTICS OF THE TRACK

           The test road layout shall be level, straight and free of obstacles or wind barriers which adversely affect the variability of road load measurement.

           The test road longitudinal slope shall not exceed ± 2 per cent.  This slope is defined as the ratio of the difference in elevation between both ends of the test road and its overall length.  In addition, the local inclination between any two points 3 m apart shall not deviate by more than ± 0.5 per cent from this longitudinal slope.

           The maximum cross-sectional camber of the test road shall be 1.5 per cent or less.

         3.  ATMOSPHERIC CONDITIONS

         3.1.  Wind

          Testing shall be performed at wind speeds averaging less than 3 m/s with peak speeds less than 5 m/s.  In addition, the vector component of the wind speed across the test track must be less than 2 m/s.  Wind velocity shall be measured at 0.7