Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery (c. 654)

ANNEX IV U.K. Requirements with regard to emission control strategies, NO_x control measures and particulate control measures

2. Technical requirements relating to emission control strategies U.K.

2.4. Control conditions U.K.

The control conditions specify an altitude, ambient temperature and engine coolant range that determines whether auxiliary emission control strategies may generally or only exceptionally be activated in accordance with point 2.3.

The control conditions specify an atmospheric pressure which is measured as absolute atmospheric static pressure (wet or dry) (‘Atmospheric pressure’)

2.4.1. Control conditions for engines of categories IWP and IWA: U.K.

(a)

an altitude not exceeding 500 metres (or equivalent atmospheric pressure of 95,5 kPa);

(b)

an ambient temperature within the range 275 K to 303 K (2 °C to 30 °C);

(c)

the engine coolant temperature above 343 K (70 °C).

2.4.2. Control conditions for engines of category RLL: U.K.

(a)

an altitude not exceeding 1 000 metres (or equivalent atmospheric pressure of 90 kPa);

(b)

an ambient temperature within the range 275 K to 303 K (2 °C to 30 °C);

(c)

the engine coolant temperature above 343 K (70 °C).

2.4.3. Control conditions for engines of categories NRE, NRG and RLR: U.K.

(a)

the atmospheric pressure greater than or equal to 82,5 kPa;

(b)

the ambient temperature within the following range:

• equal to or above 266 K (– 7 °C),

• less than or equal to the temperature determined by the following equation at the specified atmospheric pressure: T_c = – 0,4514 × (101,3 – P_b) + 311, where: T_c is the calculated ambient air temperature, K and P_b is the atmospheric pressure, kPa;

(c)

the engine coolant temperature above 343 K (70 °C).