Document ID: chunk:federal_register_of_legislation:F2023L00129:front:0:p19
Version: federal_register_of_legislation:F2023L00129
Segment Type: other
Provision Reference: 
Character Range: 53138–56078

group of vehicles which do not differ in essential engine and vehicle characteristics as set out in Annex 1;
2.65. "Wall flow Diesel Particulate Filter" means a Diesel Particulate Filter ("DPF") in which all the exhaust gas is forced to flow through a wall which filters out the solid matter;
2.66. "Wobbe index (lower Wl; or upper Wu)" means the ratio of the corresponding calorific value of a gas per unit volume and the square root of its relative density under the same reference conditions:

2.67. "λ-shift factor (Sλ)" means an expression that describes the required flexibility of the engine management system regarding a change of the excess-air ratio λ if the engine is fuelled with a gas composition different from pure methane (see Appendix 5 to Annex 4 for the calculation of Sλ).
  3.  Application for approval
3.1. Application for type approval of an engine system or engine family as a separate technical unit
              3.1.1. The manufacturer or his authorized representative shall submit to the Type Approval Authority an application for type approval of an engine system or engine family as a separate technical unit.

              3.1.2. The application referred to in paragraph 3.1.1. shall be drawn up in accordance with the model of the information document set out in Annex 1. For that purpose Part 1 of Annex 1 shall apply.

              3.1.3. Together with the application, the manufacturer shall provide a documentation package that fully explains any element of design which affects emissions, the emission control strategy of the engine system, the means by which the engine system controls the output variables which have a bearing upon emissions, whether that control is direct or indirect, anti-tampering measures and fully explains the warning and inducement system required by paragraphs 4. and 5. of Annex 11.

              The documentation package shall be identified and dated by the approval authority and kept by that authority for at least 10 years after the approval is granted.

              The documentation package shall consist of the following parts:

                  (a)            The information set out in paragraph 5.1.4.;

                  (b)           An AES documentation package, as described in Annex 2D to this Regulation in order for the approval authorities to be able to assess the proper use of AES.

              At the request of the manufacturer, the approval authority shall conduct a preliminary assessment of the AES for new vehicle types. In that case, the manufacturer shall provide the draft AES documentation package to the approval authority between 2 and 12 months before the start of the type-approval process.

              The approval authority shall make a preliminary assessment on the basis of the draft AES documentation package provided by the manufacturer. The approval authority shall make the preliminary assessment in accordance with the