ANNEX IIISupplementary provisions
ANNEX III VERIFYING EXHAUST EMISSIONS 1. INTRODUCTION 1.1. This Annex sets out the test procedure for verifying exhaust emissions. 2. GENERAL REQUIREMENTS 2.1. The general requirements for conducting the tests and interpreting the results shall be those set out in Annex 4B to UN/ECE Regulation No 49 with the exceptions set out in points 2.2 to 2.6. 2.2. The appropriate reference fuels as described in Annex IX to this Regulation shall be used for testing. 2.3. If the emissions are measured in the raw exhaust gas, Table 5 in Section 8.4.2.3 of Annex 4B to UN/ECE Regulation No 49 of shall be replaced with the following table: Table 1 Raw exhaust gas u values and component densities Fuel ρ e Gas NO x CO HC CO 2 O 2 CH 4 ρ gas [kg/m 3 ] 2,053 1,250 ( 1 ) 1,9636 1,4277 0,716 u gas ( 2 ) Diesel (B7) 1,2943 0,001586 0,000966 0,000482 0,001517 0,001103 0,000553 Ethanol (ED95) 1,2768 0,001609 0,000980 0,000780 0,001539 0,001119 0,000561 CNG ( 3 ) 1,2661 0,001621 0,000987 0,000528 ( 4 ) 0,001551 0,001128 0,000565 Propane 1,2805 0,001603 0,000976 0,000512 0,001533 0,001115 0,000559 Butane 1,2832 0,001600 0,000974 0,000505 0,001530 0,001113 0,000558 LPG ( 5 ) 1,2811 0,001602 0,000976 0,000510 0,001533 0,001115 0,000559 2.4. If the emissions are measured in the dilute exhaust gas, Table 6 in Section 8.5.2.3.1 of Annex 4B to UN/ECE Regulation No 49 shall be replaced with the following table: Table 2 Dilute exhaust gas u values and component densities Fuel ρ de Gas NO x CO HC CO 2 O 2 CH 4 ρ gas [kg/m 3 ] 2,053 1,250 ( 6 ) 1,9636 1,4277 0,716 u gas ( 7 ) Diesel (B7) 1,293 0,001588 0,000967 0,000483 0,001519 0,001104 0,000553 Ethanol (ED95) 1,293 0,001588 0,000967 0,000770 0,001519 0,001104 0,000553 CNG ( 8 ) 1,293 0,001588 0,000967 0,000517 ( 9 ) 0,001519 0,001104 0,000553 Propane 1,293 0,001588 0,000967 0,000507 0,001519 0,001104 0,000553 Butane 1,293 0,001588 0,000967 0,000501 0,001519 0,001104 0,000553 LPG ( 10 ) 1,293 0,001588 0,000967 0,000505 0,001519 0,001104 0,000553 2.5. Ammonia (NH 3 ) shall be determined in accordance with Appendix 1 to this Annex. 2.6. The emissions from positive-ignition engines fuelled with petrol or E85 shall be determined in accordance with Appendix 2 to this Annex. ( 1 ) depending on fuel. ( 2 ) at λ = 2, dry air, 273 K, 101,3 kPa. ( 3 ) u accurate within 0,2 % for mass composition of: C = 66 - 76 %; H = 22 - 25 %; N = 0 - 12 %. ( 4 ) NMHC on the basis of CH 2,93 (for total HC the u gas coefficient of CH 4 shall be used). ( 5 ) u accurate within 0,2 % for mass composition of: C 3 = 70 - 90 %; C 4 = 10 - 30 %. ( 6 ) depending on fuel. ( 7 ) at λ = 2, dry air, 273 K, 101,3 kPa. ( 8 ) u accurate within 0,2 % for mass composition of: C = 66 - 76 %; H = 22 - 25 %; N = 0 - 12 %. ( 9 ) NMHC on the basis of CH 2,93 (for total HC the u gas coefficient of CH 4 shall be used). ( 10 ) u accurate within 0,2 % for mass composition of: C 3 = 70 - 90 %; C 4 = 10 - 30 %.