Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:5:p19
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 5 (pt 19/36)
Character Range: 472716–475965

kPa           Water vapour pressure after cooling bath
ps       kPa           Dry atmospheric pressure
p1       kPa           Pressure depression at pump inlet
P(a)     kW            Power absorbed by auxiliaries to be fitted for test
P(b)     kW            Power absorbed by auxiliaries to be removed for test
P(n)     kW            Net power non-corrected
P(m)     kW            Power measured on test bed
qmaw     kg/h or kg/s  Intake air mass flow rate on wet basis
qmad     kg/h or kg/s  Intake air mass flow rate on dry basis
qmdw     kg/h or kg/s  Dilution air mass flow rate on wet basis
qmdew    kg/h or kg/s  Diluted exhaust gas mass flow rate on wet basis
qmdew,i  kg/s          Instantaneous CVS flow rate mass on wet basis
qmedf    kg/h or kg/s  Equivalent diluted exhaust gas mass flow rate on wet basis
qmew     kg/h or kg/s  Exhaust gas mass flow rate on wet basis

Symbol  Unit          Term
qmf     kg/h or kg/s  Fuel mass flow rate
qmp     kg/h or kg/s  Particulate sample mass flow rate
qvs     dm3/min       Sample flow rate into analyser bench
qvt     cm3/min       Tracer gas flow rate
Ω       —             Bessel constant
Qs      m3/s          PDP/CFV-CVS volume flow rate
QSSV    m3/s          SSV-CVS volume flow rate
ra      —             Ratio of cross sectional areas of isokinetic probe and exhaust pipe
rd      —             Dilution ratio
rD      —             Diameter ratio of SSV-CVS
rp      —             Pressure ratio of SSV-CVS
rs      —             Sample ratio
Rf      —             FID response factor
ρ       kg/m3         density
S       kW            Dynamometer setting
Si      m–1           Instantaneous smoke value
Sλ      —             λ-shift factor
T       K             Absolute temperature
Ta      K             Absolute temperature of the intake air
t       s             Measuring time
te      s             Electrical response time
tf      s             Filter response time for Bessel function
tp      s             Physical response time
Δt      s             Time interval between successive smoke data (= 1/sampling rate)
Δti     s             Time interval for instantaneous CVS flow
τ       %             Smoke transmittance
u       —             Ratio between densities of gas component and exhaust gas
V0      m3/rev        PDP gas volume pumped per revolution
Vs      l             System volume of analyser bench
W       —             Wobbe index
Wact    kWh           Actual cycle work of ETC
Wref    kWh           Reference cycle work of ETC
WF      —             Weighting factor
WFE     —             Effective weighting factor
X0      m3/rev        Calibration function of PDP volume flow rate
Yi      m–1           1 s Bessel averaged smoke value

(**) OJ L 313, 29.11.2005, p. 1.
(***) Article 4(1) of this Directive provides for the monitoring for major functional failure instead of monitoring for the degradation or the loss of catalytic/filtering efficiency of an exhaust aftertreatment system. Examples of major functional failure are given in sections 3.2.3.2 and 3.2.3.3 of Annex IV to Directive 2005/78/EC.
(****) OJ L 375, 31.12.1980, p. 46. Directive as last amended by Directive 1999/99/EC (OJ L 334, 28.12.1999, p. 32).'
     (c)     Former sections 2.32.2 and