ANNEX IV U.K. EMISSIONS DATA REQUIRED AT TYPE-APPROVAL FOR ROADWORTHINESS PURPOSES Measuring carbon monoxide emissions at idling speeds

2. GENERAL REQUIREMENTS U.K.

2.1. The general requirements shall be those set out in Sections 5.3.7.1 to 5.3.7.4 of UN/ECE Regulation No 83, with the exceptions set out in Sections 2.2, 2.3 and 2.4. U.K.

2.2. The atomic ratios set out in Section 5.3.7.3 shall be understood as follows: U.K.

Hcv = Atomic ratio of hydrogen to carbon	for petrol (E10) 1,93 for LPG 2,525 for NG/biomethane 4,0 for ethanol (E85) 2,74
Ocv = Atomic ratio of oxygen to carbon	for petrol (E10) 0,032 for LPG 0,0 for NG/biomethane 0,0 for ethanol (E85) 0,385

2.3. The table in point 1.4.3 of Appendix 5 to Annex I to this Regulation shall be completed on the basis of the requirements set out in points 2.2 and 2.4 of this Annex. U.K.

2.4. The manufacturer shall confirm the accuracy of the Lambda value recorded at the time of type-approval in point 2.1 of this Annex as being representative of typical production vehicles within 24 months of the date of the granting of type-approval. An assessment shall be made on the basis of surveys and studies of production vehicles. U.K.