Division 6.2.4 Approval criteria

The facility or combination of facilities used shall be approved if both of the following two criteria are fulfilled:

1. (a)

   The difference in cycle energy, expressed as ε_k, between the wind tunnel method and the coastdown method shall be within ± 0,05 for each of the three vehicles k according to the following equation:

   $${\epsilon }_k=\frac{E_{\mathrm{k,WTM}}}{E_{\mathrm{k,coastdown}}}-1$$

   where:

   ε_k

2. is the difference in cycle energy over a complete Class 3 WLTC for vehicle k between the wind tunnel method and the coastdown method, per cent;

E_{k, WTM}

3. is the cycle energy over a complete Class 3 WLTC for vehicle k, calculated with the road load derived from the wind tunnel method (WTM) calculated according to paragraph 5 of Sub-Annex 7, J;

E_{k, coastdown}

4. is the cycle energy over a complete Class 3 WLTC for vehicle k, calculated with the road load derived from the coastdown method calculated according to paragraph 5. of Sub-Annex 7, J.; and