Division 2.3.1.1.2 Calculation based on dilution ratio

United Kingdom

The particulate emission over the cycle m _PM [g] shall be calculated by means of equation (7-44):

m_{PM} = \frac{m_{f}}{m_{sep}} \times \frac{m_{edf}}{1000}

(7-44)

Where:

m _f

particulate mass sampled over the cycle [mg]

m _sep

mass of diluted exhaust gas passing the particulate collection filters [kg]

m _edf

mass of equivalent diluted exhaust gas over the cycle [kg]

The total mass of equivalent diluted exhaust gas mass over the cycle m _edf [kg] shall be determined by means of equation (7-45):

m_{edf} = \frac{1}{f} \times \sum_{i = 1}^{N} q_{m edf, i}

(7-45)

With:

F1 $q_{m edf, i} = q_{m ew, i} \times r_{d, i}$	(7-46)
$r_{d, i} = \frac{q_{m dew, i}}{q_{m dew, i} - q_{m dw, i}}$	(7-47)

Where:

q_m _edf, _i

instantaneous equivalent diluted exhaust gas mass flow rate [kg/s]

q_m _ew, _i

instantaneous exhaust gas mass flow rate on a wet basis [kg/s]

r _d, _i

instantaneous dilution ratio [-]

q_m _dew, _i

instantaneous diluted exhaust gas mass flow rate on a wet basis [kg/s]

q_m _dw,i

instantaneous dilution air mass flow rate [kg/s]

data sampling rate [Hz]

number of measurements [-]

Annotations

F1: Substituted by Commission Delegated Regulation (EU) 2018/989 of 18 May 2018 amending and correcting Delegated Regulation (EU) 2017/654 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 (Text with EEA relevance).