anx_I__point_1__point_b__table

Symbol | Unit | Term A p | m2 | Cross sectional area of the isokinetic sampling probe A e | m2 | Cross sectional area of the exhaust pipe c | ppm/vol. % | Concentration C d | — | Discharge coefficient of SSV-CVS C1 | — | Carbon 1 equivalent hydrocarbon d | m | Diameter D 0 | m3/s | Intercept of PDP calibration function D | — | Dilution factor D | — | Bessel function constant E | — | Bessel function constant E E | — | Ethane efficiency E M | — | Methane efficiency E Z | g/kWh | Interpolated NOx emission of the control point f | 1/s | Frequency f a | — | Laboratory atmospheric factor fc | s–1 | Bessel filter cut-off frequency F s | — | Stoichiometric factor H | MJ/m3 | Calorific value H a | g/kg | Absolute humidity of the intake air H d | g/kg | Absolute humidity of the dilution air i | — | Subscript denoting an individual mode or instantaneous measurement K | — | Bessel constant k | m–1 | Light absorption coefficient k f | | Fuel specific factor for dry to wet correction k h,D | — | Humidity correction factor for NOx for diesel engines k h,G | — | Humidity correction factor for NOx for gas engines K V | | CFV calibration function k W,a | — | Dry to wet correction factor for the intake air k W,d | — | Dry to wet correction factor for the dilution air k W,e | — | Dry to wet correction factor for the diluted exhaust gas k W,r | — | Dry to wet correction factor for the raw exhaust gas L | % | Percent torque related to the maximum torque for the test engine La | m | Effective optical path length M ra | g/mol | Molecular mass of the intake air M re | g/mol | Molecular mass of the exhaust m d | kg | Mass of the dilution air sample passed through the particulate sampling filters m ed | kg | Total diluted exhaust mass over the cycle m edf | kg | Mass of equivalent diluted exhaust over the cycle m ew | kg | Total exhaust mass over the cycle m f | mg | Particulate sample mass collected m f,d | mg | Particulate sample mass of the dilution air collected m gas | g/h or g | Gaseous emissions mass flow (rate) m se | kg | Sample mass over the cycle m sep | kg | Mass of the diluted exhaust sample passed through the particulate sampling filters m set | kg | Mass of the double diluted exhaust sample passed through the particulate sampling filters m ssd | kg | Mass of secondary dilution air N | % | Opacity N P | — | Total revolutions of PDP over the cycle N P,i | — | Revolutions of PDP during a time interval n | min–1 | Engine speed n p | s–1 | PDP speed nhi | min–1 | High engine speed nlo | min–1 | Low engine speed nref | min–1 | Reference engine speed for ETC test p a | kPa | Saturation vapour pressure of the engine intake air p b | kPa | Total atmospheric pressure p d | kPa | Saturation vapour pressure of the dilution air p p | kPa | Absolute pressure p r | kPa | Water vapour pressure after cooling bath p s | kPa | Dry atmospheric pressure p 1 | 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 q maw | kg/h or kg/s | Intake air mass flow rate on wet basis q mad | kg/h or kg/s | Intake air mass flow rate on dry basis q mdw | kg/h or kg/s | Dilution air mass flow rate on wet basis q mdew | kg/h or kg/s | Diluted exhaust gas mass flow rate on wet basis q mdew,i | kg/s | Instantaneous CVS flow rate mass on wet basis q medf | kg/h or kg/s | Equivalent diluted exhaust gas mass flow rate on wet basis q mew | kg/h or kg/s | Exhaust gas mass flow rate on wet basis q mf | kg/h or kg/s | Fuel mass flow rate q mp | kg/h or kg/s | Particulate sample mass flow rate q vs | dm3/min | Sample flow rate into analyser bench q vt | cm3/min | Tracer gas flow rate Ω | — | Bessel constant Q s | m3/s | PDP/CFV-CVS volume flow rate Q SSV | m3/s | SSV-CVS volume flow rate ra | — | Ratio of cross sectional areas of isokinetic probe and exhaust pipe r d | — | Dilution ratio r D | — | Diameter ratio of SSV-CVS r p | — | Pressure ratio of SSV-CVS r s | — | 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 T a | 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) Δt i | s | Time interval for instantaneous CVS flow τ | % | Smoke transmittance u | — | Ratio between densities of gas component and exhaust gas V 0 | m3/rev | PDP gas volume pumped per revolution V s | l | System volume of analyser bench W | — | Wobbe index Wact | kWh | Actual cycle work of ETC Wref | kWh | Reference cycle work of ETC W F | — | Weighting factor WFE | — | Effective weighting factor X 0 | m3/rev | Calibration function of PDP volume flow rate Yi | m–1 | 1 s Bessel averaged smoke value

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Source: EUR-Lex (Cellar) · retrieved 2026-11-10 · Text as adopted (Official Journal); later amendments are not incorporated in this text.