Division 3.2 Calculation of exhaust and CO2 emissions, and fuel consumption of multiple periodically regenerating systemsF1

The following shall be calculated for one Type 1 operation cycle for criteria emissions and for CO₂ emissions. The CO₂ emissions used for that calculation shall be from the result of step 3 described in Table A7/1 of Sub-Annex 7.

$M_{sik} = \frac{\sum_{n_{k}}^{j = 1} {M′}_{sik,j}}{n_{k}}$ for n_j≥ 1

$M_{rik} = \frac{\sum_{d_{k}}^{j = 1} {M′}_{rik,j}}{d_{k}}$ for d ≥ 1

$M_{si} = \frac{\sum_{x}^{k = 1} M_{sik} \times D_{k}}{\sum_{x}^{k = 1} D_{k}}$

$M_{ri} = \frac{\sum_{x}^{k = 1} M_{rik} \times d_{k}}{\sum_{x}^{k = 1} d_{k}}$

$M_{pi} = \frac{M_{si} \times \sum_{x}^{k = 1} D_{k} + M_{ri} \times \sum_{x}^{k = 1} d_{k}}{\sum_{x}^{k = 1} (D_{k} + d_{k})}$

$M_{pi} = \frac{\sum_{x}^{k = 1} (M_{sik} \times D_{k} + M_{rik} \times d_{k})}{\sum_{x}^{k = 1} (D_{k} + d_{k})}$

K_i factor

$K_{i} = \frac{M_{pi}}{M_{si}}$

K_i offset

K_i = M_pi – M_si

where:

M_si

are the mean mass emissions of all events k of compound i without regeneration, g/km;

M_ri

are the mean mass emissions of all events k of compound i during regeneration, g/km;

M_pi

are the mean mass emission of all events k of compound i, g/km;

M_sik

are the mean mass emissions of event k of compound i without regeneration, g/km;

M_rik

are the mean mass emissions of event k of compound i during regeneration, g/km;

M′_sik,j

are the mass emissions of event k of compound i in g/km without regeneration measured at point j where 1 ≤ j ≤ n_k, g/km;

M′_rik,j

are the mass emissions of event k of compound i during regeneration (when j > 1, the first Type 1 test is run cold, and subsequent cycles are hot) measured at test cycle j where 1 ≤ j ≤ d_k, g/km;

n_k

are the number of complete test cycles of event k, between two cycles where regenerative phases occur, during which emissions measurements (Type 1 WLTCs or equivalent engine test bench cycles) are made, ≥ 2;

d_k

is the number of complete applicable test cycles of event k required for complete regeneration;

D_k

is the number of complete applicable test cycles of event k between two cycles where regenerative phases occur;

is the number of complete regeneration events.

The calculation of M_pi is shown graphically in Figure A6.App1/2.

The calculation of K_i for multiple periodically regenerating systems is only possible after a certain number of regeneration events for each system.

After performing the complete procedure (A to B, see Figure A6.App1/2), the original starting condition A should be reached again.

Figure A6.App1/2Parameters measured during emissions test during and between cycles where regeneration occurs (schematic example)

Annotations

Textual amendments

F1: Substituted by Commission Regulation (EU) 2018/1832 of 5 November 2018 amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) 2017/1151 for the purpose of improving the emission type approval tests and procedures for light passenger and commercial vehicles, including those for in-service conformity and real-driving emissions and introducing devices for monitoring the consumption of fuel and electric energy (Text with EEA relevance).