UN R83 — Supplement 11 to the 07 series of amendments

Paragraphs 5.3.1.2.1.2., 5.3.2.1.2. and 5.3.3.1.2. now use the term “mono-fuel gas vehicles”. For the Type I, II and III tests, mono-fuel gas vehicles will be regarded as vehicles that can only run on a gaseous fuel. This applies notwithstanding paragraphs 5.3.1.2.1.1., 5.3.2.1.1. and 5.3.3.1.1. Before, the paragraphs applied to vehicles that can be fuelled with either petrol or a gaseous fuel, under two conditions. The petrol system was fitted for emergency purposes or starting only, and the petrol tank could not contain more than 15 litres of petrol. Footnote 8 to paragraph 3. of Annex 1 now also uses the term “Mono-fuel gas vehicles”.

New paragraph 5.3.9. says that vehicles that use a reagent for the exhaust after-treatment system must meet the requirements described in Appendix 6. In paragraph 1. of Appendix 6, the rule on the 'reagent tank' now refers to “this appendix” instead of “this Annex”.

In paragraph 3.2.12.2.5.5. of Annex 1, the schematic drawing of the fuel tank now indicates the nominal capacity and material. Before, it indicated the capacity and material. In paragraph 4.7.2. of Annex 7, the chamber must have one or more fans or blowers of like capacity 0.1 to 0.5 m3/sec. Before, the capacity was 0.1 to 0.5 m3/min.

New paragraph 2.14.1. says that “permanent” in this context means that the default mode is not recoverable. That is, the diagnostic or control strategy that caused it cannot run in the next driving cycle or confirm that the causing conditions are gone. All other emission default modes are considered not to be permanent. New paragraph 2.21. defines “Limp-home routines” as any default mode other than emission default mode. Paragraph 3.5.1. adds emission default modes to the purposes for which the MI may be used. It also adds “which effect the emission system” after “limp-home routines”.

Paragraph 3.1.1. now says that all emission-related fault codes must be consistent with paragraph 6.5.3.5. of Appendix 1 to this annex. Before, it referred to paragraph 6.5.3.4. Paragraph 3.8.1. now lists the criteria (a) to (c) for the 40 driving cycles in that paragraph itself. They cover cumulative time since engine start, cumulative vehicle operation at or above 40 km/h, and continuous vehicle operation at idle. Before, paragraph 3.8.1. referred to the criteria specified in sections 7.5.1.(a)–(c) of Annex 11, Appendix 1. Those criteria also require an elevation of less than 2,440 m above sea level and an ambient temperature of at least -7 °C.

Under new item (g) of paragraph 7.3.2., manufacturers may request to use special denominator conditions for certain components or systems. The request can be approved only if this is demonstrated to the Type Approval Authority by submitting data and/or an engineering evaluation. The data and/or evaluation must show that other conditions are necessary to allow for reliable detection of malfunctions. In the condition “The general denominator conditions are fulfilled”, the word “arc” changes to “are”.

Appendix 7 of Annex 4a is renamed Appendix 7a, and paragraph 5.1. now refers to Appendix 7a for measuring the vehicle road load. Paragraph 5.1. also allows the methodology in Appendix 7b where the road load has already been determined according to WLTP procedures (UN GTR No. 15). New Appendix 7b gives an alternative procedure for determination of the total road load power of a vehicle. It calculates the NEDC road load coefficients F0,n, F1n and F2n from the WLTP road load of the vehicle. For F0,n, it takes into account the effects of different inertia, different tyre pressure, the inertia of rotating parts and different tyre tread depth. A new footnote reads “As defined in UN GTR No. 15”.