Appendix 1 MEASURING CARBON MONOXIDE EMISSION AT IDLING SPEEDS
United Kingdom
1.
INTRODUCTION
1.1.
This appendix describes the procedure for the type 2 test, measuring carbon monoxide emissions at idling speeds (normal and high).
2.
GENERAL REQUIREMENTS
2.1.
The general requirements shall be those specified in paragraphs 5.3.7.1 to 5.3.7.4 of UN/ECE Regulation 83, with the exceptions set out in sections 2.2, 2.3 and 2.4.
F12.2.
The atomic ratios specified in point 5.3.7.3 shall be understood as follows:
Atomic ratio of hydrogen to carbon
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for petrol (E5) 1,89
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for petrol (E10) 1,93
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for LPG 2,53
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for NG/biomethane 4,0
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for ethanol (E85) 2,74
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for ethanol (E75) 2,61
Atomic ratio of oxygen to carbon
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for petrol (E5) 0,016
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for petrol (E10) 0,033
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for LPG 0,0
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for NG/biomethane 0,0
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for ethanol (E85) 0,39
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for ethanol (E75) 0,329
2.3.
The table in section 2.2 of Appendix 4 to Annex I to this Regulation shall be completed on the basis of the requirements set out in sections 2.2 and 2.4 of this Annex.
2.4.
The manufacturer shall confirm the accuracy of the Lambda value recorded at the time of type-approval in paragraph 2.1 of this Appendix as being representative of typical production vehicles within 24 months of the date of the granting of type-approval by the technical service. An assessment shall be made on the basis of surveys and studies of production vehicles.
3.
TECHNICAL REQUIREMENTS
3.1.
The technical requirements shall be those set out in Annex 5 to UN/ECE Regulation No 83, with the exceptions set out in section 3.2.
3.2.
The reference fuels specified in paragraph 2.1 of Annex 5 to UN/ECE Regulation No 83 shall be understood as referring to the appropriate reference fuel specifications in Annex IX to this Regulation.