Appendix 3

This Appendix sets out the additional requirements to ensure the correct operation of NO_x control measures for engines of category RLL. It includes requirements for engines that rely on the use of a reagent in order to reduce emissions. The EU type-approval shall be made conditional upon the application of the relevant provisions on operator instruction, installation documents and operator warning system that are set out in this Appendix.

The manufacturer shall provide information that fully describes the functional operational characteristics of the NO_x control measures, in accordance with point 1.5 of Part A of Annex I to Implementing Regulation (EU) 2017/656.

If the emission control system requires a reagent, the characteristics of that reagent, including the type of reagent, information on concentration when the reagent is in solution, operational temperature conditions and reference to international standards for composition and quality must be specified by the manufacturer, in the information document set out in Appendix 3 of Annex I to Implementing Regulation (EU) 2017/656.

When a reagent is used the EU type-approval shall be conditional upon providing indicators or other appropriate means, according to the configuration of the non-road mobile machinery, informing the operator on:

1. (a)

   the amount of reagent remaining in the reagent storage container and by an additional specific signal, when the remaining reagent is less than 10 % of the full container's capacity;

2. (b)

   when the reagent container becomes empty, or almost empty;

3. (c)

   when the reagent in the storage tank does not comply with the characteristics declared and recorded in the information document set out in Appendix 3 of Annex I to Implementing Regulation (EU) 2017/656, in accordance with the installed means of assessment.

4. (d)

   when the dosing activity of the reagent is interrupted, in cases other than those executed by the engine ECU or the dosing controller, reacting to engine operating conditions where the dosing is not required, provided that these operating conditions are made available to the approval authority.

By the choice of the manufacturer the requirements of reagent compliance with the declared characteristics and the associated NO_x emission tolerance shall be satisfied by one of the following means:

1. (a)

   direct means, such as the use of a reagent quality sensor.

2. (b)

   indirect means, such as the use of a NO_x sensor in the exhaust system to evaluate reagent effectiveness.

3. (c)

   any other means, provided that its efficacy is at least equal to the one resulting by the use of the means of points (a) or (b) and the main requirements of this section 4 are maintained.