Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:20:p15
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 20 (pt 15/29)
Character Range: 257502–262011

kg                              Total exhaust mass over the cycle
mex        kg                              Total mass of diluted exhaust gas extracted from the dilution tunnel for particle number sampling
mf         mg                              Particulate sampling filter mass

mgas       g                               Mass of gaseous emissions over the test cycle

mp         mg                              Particulate sample mass collected

mPM        g                               Mass of particulate emissions over the test cycle

mPM,corr   g/test                          Mass of particulates corrected for extraction of particle number sample flow

mse        kg                              Exhaust sample mass over the test cycle

msed       kg                              Mass of diluted exhaust gas passing the dilution tunnel

msep       kg                              Mass of diluted exhaust gas passing the particulate collection filters

mssd       kg                              Mass of secondary diluent
M          Nm                              Torque

Ma         g/mol                           Molar mass of the intake air

Md         g/mol                           Molar mass of the diluent

Me         g/mol                           Molar mass of the exhaust

Mf         Nm                              Torque absorbed by auxiliaries/equipment to be fitted

Mgas       g/mol                           Molar mass of gaseous components

Mr         Nm                              Torque absorbed by auxiliaries/equipment to be removed

N          -                               Number of particles emitted over the test cycle

n          -                               Number of measurements

nr         -                               Number of measurements with regeneration

n          min-1                           Engine rotational speed

nhi        min-1                           High engine speed

nlo        min-1                           Low engine speed

npref      min-1                           Preferred engine speed

np         r/s                             PDP pump speed

Ncold      -                               The total number of particles emitted over the WHTC cold test cycle

Nhot       -                               The total number of particles emitted over the WHTC hot test cycle

Nin        -                               Upstream particle number concentration

Nout       -                               Downstream particle number concentration

pa         kPa                             Saturation vapour pressure of engine intake air

pb         kPa                             Total atmospheric pressure

pd         kPa                             Saturation vapour pressure of the diluent

pp         kPa                             Absolute pressure

pr         kPa                             Water vapour pressure after cooling bath

ps         kPa                             Dry atmospheric pressure

P          kW                              Power

Pf         kW                              Power absorbed by auxiliaries/equipment to be fitted

Pr         kW                              Power absorbed by auxiliaries/equipment to be removed

qex        kg/s                            Particle number sample mass flow rate

qmad       kg/s                            Intake air mass flow rate on dry basis

qmaw       kg/s                            Intake air mass flow rate on wet basis

qmCe       kg/s                            Carbon mass flow rate in the raw exhaust gas

qmCf       kg/s                            Carbon mass flow rate into the engine

qmCp       kg/s                            Carbon mass flow rate in the partial flow dilution system

qmdew      kg/s                            Diluted exhaust gas mass flow rate on wet basis

qmdw       kg/s                            Diluent mass flow rate on wet basis

qmedf      kg/s                            Equivalent diluted exhaust gas mass flow rate on wet basis

qmew       kg/s                            Exhaust gas mass flow rate on wet basis

qmex       kg/s                            Sample mass flow rate extracted from dilution tunnel

qmf        kg/s                            Fuel mass flow rate

qmp        kg/s                            Sample flow of exhaust gas into partial flow dilution system

qsw        kg/s                            Mass flow rate fed back into dilution tunnel to compensate for particle number sample