3.2 Technical File and on board NO_x verification procedures

  3.2.1 In addition to the information supplied in paragraph 3.1.3 of these guidelines and items in section 2.4 of the NTC 2008, engine systems fitted with SCR should include the following information in its Technical File:

• .1 reductant: component/type and concentration;

• .2 reductant injection system including critical dimensions and supply volume;

• .3 design features of SCR specific components in the exhaust duct from the engine exhaust manifold to the SCR chamber;

• .4 catalyst block specification and arrangement in the SCR chamber;

• .5 inlet parameters including allowable exhaust gas temperature (maximum and minimum) at the inlet of the SCR chamber;

• .6 cross-unit parameters: allowable pressure loss (Δp) between inlet and outlet of SCR chamber and in the exhaust duct caused by SCR components;

• .7 aspects related to the fuel oil quality resulting in continued compliance of the engine with the applicable NO_x emission limit;

• .8 factors related to the deterioration rate of SCR performance, e.g., exchange condition for SCR blocks and recommended exchange time of SCR blocks;

• .9 controlling arrangements and settings of the SCR, e.g., model, specification of control device;

• .10 measures to minimize reductant slip;

• .11 parameter check method as the verification procedure: with regard to the application of the parameter check method, requirements given in paragraph 2.3.6 of the NTC 2008 and guidance given in appendix VII, paragraph 2 of the NTC 2008 should be taken into account in assessing the adequacy of a proposed procedure with analysers meeting or exceeding the requirements of appendix III of the NTC 2008; and

• .12 any other parameter(s) specified by the manufacturer.