(3) With the aim to ensure that the provisions on the construction of engines to be installed in non-road mobile machinery correspond to the technical progress, the latest versions of CEN/Cenelec or ISO standards which are accessible to the public should be made applicable as regards to certain requirements.

(4) Checks on the conformity of engines with the applicable technical requirements throughout the production process are an essential part of the EU type-approval process. Therefore, checks on the conformity of production procedures should be further improved and aligned with the stricter procedures applicable to road vehicles in order to increase the overall efficiency of the EU type-approval process.

(5) In order to ensure that technical services meet the same high level of performance standards in all Member States, this Regulation should set out the harmonised requirements with which technical services have to comply, as well as the procedure for the assessment of that compliance and for the accreditation of those services.

(6) For the sake of clarity, it is appropriate to align the numbering of test procedures in this Regulation with those in Global Technical Regulation No 11(3) and in UNECE Regulation 96(4),

HAS ADOPTED THIS REGULATION:

Article 1

Definitions

The following definitions shall apply:

(1) ‘wobbe index’ or ‘W’ 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:

[Bild bitte in Originalquelle ansehen]

(2) ‘λ-shift factor’ or ‘S

’ 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;

(3) ‘liquid-fuel mode’ means the normal operating mode of a dual-fuel engine during which the engine does not use any gaseous fuel for any engine operating condition;

(4) ‘dual-fuel mode’ means the normal operating mode of a dual-fuel engine during which the engine simultaneously uses liquid fuel and a gaseous fuel at some engine operating conditions;

(5) ‘particulate after-treatment system’ means an exhaust after-treatment system designed to reduce emissions of particulate pollutants through a mechanical, aerodynamic, diffusional or inertial separation;

(6) ‘governor’ means a device or control strategy that automatically controls engine speed or load, other than an over-speed limiter as installed in an engine of category NRSh limiting the maximum engine speed for the sole purpose of preventing the engine operating at speeds in excess of a certain limit;

(7) ‘ambient temperature’ means, in relation to a laboratory environment (e.g. filter weighing room or chamber), the temperature within the specified laboratory environment;

(8) ‘base emission control strategy’ or ‘BECS’ means an emission control strategy that is active throughout the range of torque and speed over which the engine operates, unless an auxiliary emission control strategy (AECS) is activated;

(9) ‘reagent’ means any consumable or non-recoverable medium required and used for the effective operation of the exhaust after-treatment system;

(10) ‘auxiliary emission control strategy’ or ‘AECS’ means an emission control strategy that is activated and temporarily modifies a base emission control strategy (BECS) for a specific purpose and in response to a specific set of ambient and/or operating conditions and only remains in operation as long as those conditions exist;

(11) ‘good engineering judgment’ means judgments consistent with generally accepted scientific and engineering principles and available relevant information;

(12) ‘high speed’ or ‘n

’ means the highest engine speed where 70 % of the maximum power occurs;

(13) ‘low speed’ or ‘n

’ means the lowest engine speed where 50 % of the maximum power occurs;