Annex VIII

United Kingdom

Annex VIII to Delegated Regulation (EU) 2017/654 is amended as follows:

(1)

in point 4.2.2.2, in the last paragraph, the following sentence is added:

‘A description of the connection for, and method to read, those records shall be included in the information folder as set out in Part A of Annex I of Implementing Regulation (EU) 2017/656.’;
(2)

in point 4.5.1, point (b) is replaced by the following:

‘(b)

In case of a Type 2 engine, the resulting difference between the highest and the lowest maximum GER_cycle within the family shall never exceed the range set out in point 2.4.15 of Annex IX to Implementing Regulation (EU) 2017/656, except as permitted by point 3.1.’;
(3)

point 6.4.1 is replaced by the following:

‘6.4.1.

The manufacturer shall present the approval authority with evidence showing that the GER_cycle span of all members of the dual-fuel engine family remains within the range set out in point 2.4.15 of Annex IX to Implementing Regulation (EU) 2017/656, or in the case of engines with an operator-adjustable GER_cycle satisfy the requirements of point 6.5 (for example, through algorithms, functional analyses, calculations, simulations, results of previous tests, etc.).’;
(4)
the following point 6.8 is inserted:
‘6.8.

Documentation of the demonstration

A demonstration report shall document the demonstration conducted pursuant to points 6.1 to 6.7.1 The report shall:
(a)

describe the demonstration performed, including the applicable test cycle;

(b)

be included in the information folder as set out in Part A of Annex I of Implementing Regulation (EU) 2017/656.’;

(5)

Appendix 2 is amended as follows:

(a)

in point 7.1.3.2.1, the introductory wording of the first paragraph is replaced by the following:

‘In the case that the exact equations are applied to calculate instantaneous values of u _gas in accordance with paragraph 7.1.3.2(a) then, when calculating the mass per test of a gaseous emission for transient (NRTC and LSI-NRTC) test cycles and RMC, u _gas shall be included in the summation in equation (7-2) of point 2.1.2 of Annex VII by means of equation (8-1):’;
(b)

in point 7.1.3.3, the second paragraph is replaced by the following:

‘The requirements of point 8.2.1.2 of Annex VI shall apply for controlling the dilution ratio. In particular, if the combined transformation time of the exhaust gas flow measurement and the partial flow system exceeds 0,3 s, look-ahead control based on a pre-recorded test run shall be used. In this case, the combined rise time shall be ≤ 1 s and the combined delay time ≤ 10 s. Except in the case that the exhaust gas mass flow is measured directly the determination of exhaust gas mass flow shall use values of α, γ, δ and ε determined in accordance with point 7.1.5.3.’;
(c)

in point 7.1.3.4, in the paragraph under the heading, the first sentence is replaced by the following:

‘The flow meter referred to in points 9.4.5.3 and 9.4.5.4 of Annex VI shall not be sensitive to the changes in exhaust gas composition and density.’;
(d)

in point 7.1.4.1, the heading is replaced by the following:

‘7.1.4.1

Determination of the background corrected concentrations’;

(e)

point 7.1.5.2 is replaced by the following:

‘7.1.5.2.

Calculation of the fuel mixture components

Equations (8-2) to (8-7) shall be used to calculate the elemental composition of the fuel mixture:

q_mf = q_mf1 + q_mf2 (8-2)
$w_{H} = \frac{w_{H1} \times q_{m f1} + w_{H2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$ (8-3)
$w_{C} = \frac{w_{C1} \times q_{m f1} + w_{C2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$ (8-4)
$w_{S} = \frac{w_{S1} \times q_{m f1} + w_{S2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$ (8-5)
$w_{N} = \frac{w_{N1} \times q_{m f1} + w_{N2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$ (8-6)
$w_{O} = \frac{w_{O1} \times q_{m f1} + w_{O2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$ (8-7)

where:

q_m _f1

is the fuel mass flow rate of fuel 1 [kg/s]

q_m _f2

is the fuel mass flow rate of fuel 2 [kg/s]

w _H

is the hydrogen content of fuel [% mass]

w _C

is the carbon content of fuel [% mass]

w _S

is the sulphur content of fuel [% mass]

w _N

is the nitrogen content of fuel [% mass]

w _O

is the oxygen content of fuel [% mass]’;

(f)

the following point 7.1.5.3 is inserted:

‘7.1.5.3.

Calculation of the molar ratios of H, C, S, N and O related to C for the fuel mixture

The calculation of the atomic ratios (especially the H/C-ratio α) is given in Annex VII by means of equations (8-8) to (8-11):

$α = 11,9164 \times \frac{w_{H}}{w_{C}}$ (8-8)
$γ = 0,37464 \times \frac{w_{S}}{w_{C}}$ (8-9)
$δ = 0,85752 \times \frac{w_{N}}{w_{C}}$ (8-10)
$ε = 0,75072 \times \frac{w_{O}}{w_{C}}$ (8-11)

where:

w _H

is the hydrogen content of fuel, mass fraction [g/g] or [% mass]

w _C

is the carbon content of fuel, mass fraction [g/g] or [% mass]

w _S

is the sulphur content of fuel, mass fraction [g/g] or [% mass]

w _N

is the nitrogen content of fuel, mass fraction [g/g] or [% mass]

w _O

is the oxygen content of fuel, mass fraction [g/g] or [% mass]

α

is the molar hydrogen ratio (H/C)

γ

is the molar sulphur ratio (S/C)

δ

is the molar nitrogen ratio (N/C)

ε

is the molar oxygen ratio (O/C)

referring to a fuel CΗαΟεΝδSγ ’.

(g)

in point 7.2.3, in the first paragraph, the last sentence is replaced by the following:

‘The instantaneous molar component ratios shall be input in the equations (7-88), (7-90), and (7-91) of Annex VII for the continuous chemical balance.’;
(h)

in point 7.2.3.1, the introductory wording of equation (8-16) is replaced by the following:

‘In cases where exhaust gas mass flow rate is calculated based on the mixed fuel rate then w_C in equation (7-113) of Annex VII shall be calculated by means of equation (8-16):’.

q_mf = q_mf1 + q_mf2	(8-2)
$w_{H} = \frac{w_{H1} \times q_{m f1} + w_{H2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$	(8-3)
$w_{C} = \frac{w_{C1} \times q_{m f1} + w_{C2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$	(8-4)
$w_{S} = \frac{w_{S1} \times q_{m f1} + w_{S2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$	(8-5)
$w_{N} = \frac{w_{N1} \times q_{m f1} + w_{N2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$	(8-6)
$w_{O} = \frac{w_{O1} \times q_{m f1} + w_{O2} \times q_{m f2}}{q_{m f1} + q_{m f2}}$	(8-7)

$α = 11,9164 \times \frac{w_{H}}{w_{C}}$	(8-8)
$γ = 0,37464 \times \frac{w_{S}}{w_{C}}$	(8-9)
$δ = 0,85752 \times \frac{w_{N}}{w_{C}}$	(8-10)
$ε = 0,75072 \times \frac{w_{O}}{w_{C}}$	(8-11)