Document ID: chunk:federal_register_of_legislation:F2024L00443:front:0:p5
Version: federal_register_of_legislation:F2024L00443
Segment Type: other
Provision Reference: 
Character Range: 13458–16507

according to engine fuel requirements (ECE/TRANS/WP.29/2023/57) was adopted by the Administrative Committee for the United Nations 1958 Agreement Concerning the Adoption of Harmonized Technical United Nations Regulations for Wheeled Vehicles, Equipment and Parts which can be Fitted and/or be Used on Wheeled Vehicles and the Conditions for Reciprocal Recognition of Approvals Granted on the Basis of these United Nations Regulations (the UN 1958 Agreement) on 21 June 2023. Vehicles complying the technical requirements of this regulation will be accepted as complying with this ADR, once it enters into force under the UN 1958 Agreement.

                UN Regulation No. 49

         7.2.              Subject to Clauses 7.2.1 to 7.2.5, the technical requirements of United Nations Regulation No. 49 – Uniform provisions concerning the measures to be taken against the emission of gaseous and particulate pollutants from compression-ignition engines and positive ignition engines for use in vehicles, incorporating all amendments up to and including Supplement 4 to the 06 series of amendments or later.

         7.2.1              Engines must satisfy the relevant useful life provisions, not to exceed test requirements, and rules regarding use of auxiliary emission control devices or systems applicable to engines meeting the requirements of Clause 7.2.

         7.2.2 The on board diagnostic system must comply with:

            (a) if the vehicle is fitted with a compression ignition or dual-fuel engine:

              (i)     the PM Mass OTL monitoring requirements as set out in the row "general requirements" of Table 1 of Annex 9A of this regulation; and

              (ii)  the NOx OTL monitoring requirements as set out in the row "general requirements" of Table 2 of Annex 9A of this regulation.

            (b) if the vehicle is fitted with a positive ignition engine: the NOx and CO OTL monitoring requirements as set out in the row "general requirements" of Table 2 of Annex 9A of this regulation.

            (c) if the vehicle is fitted with an engine that uses a consumable reagent to reduce emissions: the reagent quality and consumption "general" requirements as set out in paragraphs 7.1.1. and 8.4.1 of this regulation.

         7.2.3              Engines fitted with a heated reagent tank and dosing system may comply with the requirements applicable to non-heated reagent tanks and dosing systems in Clause 2.4.3 of Annex 11 of this regulation in lieu of the requirements applicable to heated reagent tanks and dosing systems in Clause 2.4.2 of Annex 11 of this regulation.

         7.2.4.              Except where referenced in Annex 10, compliance with Annex 8 of this regulation is not required for the purposes of this vehicle standard.

         7.2.5              For the purposes of the PEMS test required by Annex 10 of this regulation, vehicles/engine families shall comply with the maximum allowed conformity factor applicable to the stage they are demonstrating compliance to, as specified in Table