Directive 2013/53/EU of the European Parliament and of the CouncilShow full title

2. EXHAUST EMISSION REQUIREMENTS U.K.

Propulsion engines shall be designed, constructed and assembled so that when correctly installed and in normal use, emissions shall not exceed the limit values obtained from point 2.1, Table 1 and point 2.2, Tables 2 and 3:

2.1. Values applying for the purposes of Article 55(2) and Table 2 of point 2.2: U.K.

Table 1

(g/kWh)
Type	Carbon monoxide			Hydrocarbons			Nitrogen oxidesNOx	ParticulatesPT
	A	B	n	A	B	n
Two-stroke spark ignition	150,0	600,0	1,0	30,0	100,0	0,75	10,0	Not applicable
Four-stroke spark ignition	150,0	600,0	1,0	6,0	50,0	0,75	15,0	Not applicable
Compression ignition	5,0	0	0	1,5	2,0	0,5	9,8	1,0

Where A, B and n are constants in accordance with the table, P_N is the rated engine power in kW.

2.2. Values applying from 18 January 2016: U.K.

Table 2

Exhaust emission limits for compression ignition (CI) engines ^b

a + Alternatively, compression-ignition engines with rated engine power at or above 37 kW and below 75 kW and with a swept volume below 0,9 L/cyl shall not exceed a PT emission limit of 0,20 g/kWh and a combined emission limit of 5,8 g/kWh.
b ++ Any compression-ignition engine shall not exceed a Carbon monoxide (CO) emission limit of 5,0 g/kWh.
Swept VolumeSV(L/cyl)	Rated Engine Power PN(kW)	ParticulatesPT(g/kWh)	Hydrocarbons + Nitrogen Oxides (g/kWh)
		The values referred to in table 1
	a	0,3	4,7
		0,15	5,8
		0,14	5,8
		0,12	5,8
		0,12	5,8
		0,11	5,8

Table 3

Exhaust emission limits for spark ignition (SI) engines

Type of engine	Rated EnginePower PN(kW)	Carbon monoxideCO(g/kWh)	Hydrocarbons + Nitrogen Oxides (g/kWh)
Stern-drive and inboard engines		75	5
		350	16
		350	22
Outboard engines and PWC engines			30
		300

2.3. Test cycles: U.K.

Test cycles and weighting factors to be applied:

The following requirements of ISO standard 8178-4:2007 shall be used, taking into account the values set out in the table below.

For variable speed CI engines test cycle E1 or E5 shall be applied or alternatively, above 130 kW, test cycle E3 may be applied. For variable speed SI engines test cycle E4 shall be applied.

Cycle E1, Mode number	1	2	3		4	5
Speed	Rated speed		Intermediate speed			Low-idle speed
Torque, %	100	75	75		50	0
Weighting factor	0,08	0,11	0,19		0,32	0,3
Speed	Rated speed		Intermediate speed			Low-idle speed
Cycle E3, Mode number	1		2	3	4
Speed, %	100		91	80	63
Power, %	100		75	50	25
Weighting factor	0,2		0,5	0,15	0,15
Cycle E4, Mode number	1		2	3	4	5
Speed, %	100		80	60	40	Idle
Torque, %	100		71,6	46,5	25,3	0
Weighting factor	0,06		0,14	0,15	0,25	0,4
Cycle E5, Mode number	1		2	3	4	5
Speed, %	100		91	80	63	Idle
Power, %	100		75	50	25	0
Weighting factor	0,08		0,13	0,17	0,32	0,3

Notified bodies may accept tests carried out on the basis of other tests cycles as specified in a harmonised standard and as applicable for the engine duty cycle.

2.4. Application of the propulsion engine family and choice of parent propulsion engine U.K.

The engine manufacturer shall be responsible for defining those engines from his range which are to be included in an engine family.

A parent engine shall be selected from an engine family in such a way that its emissions characteristics are representative for all engines in that engine family. The engine incorporating those features that are expected to result in the highest specific emissions (expressed in g/kWh), when measured on the applicable test cycle, should normally be selected as the parent engine of the family.

2.5. Test fuels U.K.

The test fuel used for exhaust emission testing shall meet the following characteristics:

Petrol Fuels
Property	RF-02-99Unleaded		RF-02-03Unleaded
	min	max	min	max
Research Octane Number (RON)	95	—	95	—
Motor Octane Number (MON)	85	—	85	—
Density at 15 oC (kg/m3)	748	762	740	754
Initial boiling point (°C)	24	40	24	40
Mass fraction of sulphur (mg/kg)	—	100	—	10
Lead content (mg/l)	—	5	—	5
Reid vapour pressure (kPa)	56	60	—	—
Vapour pressure (DVPE) (kPa)	—	—	56	60
Diesel Fuels
Property	RF-06-99		RF-06-03
	min	max	min	max
Cetane number	52	54	52	54
Density at 15 oC (kg/m3)	833	837	833	837
Final boiling point (°C)	—	370	—	370
Flash point (°C)	55	—	55	—
Mass fraction of sulphur (mg/kg)	To be reported	300 (50)	—	10
Mass fraction of ash (%)	To be reported	0,01	—	0,01

Notified bodies may accept tests carried out on the basis of other tests fuel as specified in a harmonised standard.