anx_I__table

Symbol | Unit | Term AP | m2 | Cross sectional area of the isokinetic sampling probe AT | m2 | Cross sectional area of the exhaust pipe CEE | — | Ethane efficiency CEM | — | Methane efficiency C1 | — | Carbon 1 equivalent hydrocarbon conc | ppm/vol. % | Subscript denoting concentration D0 | m3/s | Intercept of PDP calibration function DF | — | Dilution factor D | — | Bessel function constant E | — | Bessel function constant EZ | g/kWh | Interpolated NOx emission of the control point fa | — | Laboratory atmospheric factor fc | s-1 | Bessel filter cut-off frequency FFH | — | Fuel specific factor for the calculation of wet concentration for dry concentration FS | — | Stoichiometric factor GAIRW | kg/h | Intake air mass flow rate on wet basis GAIRD | kg/h | Intake air mass flow rate on dry basis GDILW | kg/h | Dilution air mass flow rate on wet basis GEDFW | kg/h | Equivalent diluted exhaust gas mass flow rate on wet basis GEXHW | kg/h | Exhaust gas mass flow rate on wet basis GFUEL | kg/h | Fuel mass flow rate GTOTW | kg/h | Diluted exhaust gas mass flow rate on wet basis H | MJ/m3 | Calorific value HREF | g/kg | Reference value of absolute humidity (10,71g/kg) Ha | g/kg | Absolute humidity of the intake air Hd | g/kg | Absolute humidity of the dilution air HTCRAT | mol/mol | Hydrogen-to-Carbon ratio i | — | Subscript denoting an individual mode K | — | Bessel constant k | m-1 | Light absorption coefficient KH,D | — | Humidity correction factor for NOx for diesel engines KH,G | — | Humidity correction factor for NOx for gas engines KV | | CFV calibration function KW,a | — | Dry to wet correction factor for the intake air KW,d | — | Dry to wet correction factor for the dilution air KW,e | — | Dry to wet correction factor for the diluted exhaust gas KW,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 | | Slope of PDP calibration function mass | g/h or g | Subscript denoting emissions mass flow (rate) MDIL | kg | Mass of the dilution air sample passed through the particulate sampling filters Md | mg | Particulate sample mass of the dilution air collected Mf | mg | Particulate sample mass collected Mf,p | mg | Particulate sample mass collected on primary filter Mf,b | mg | Particulate sample mass collected on back-up filter MSAM | | Mass of the diluted exhaust sample passed through the particulate sampling filters MSEC | kg | Mass of secondary dilution air MTOTW | kg | Total CVS mass over the cycle on wet basis MTOTW,i | kg | Instantaneous CVS mass on wet basis N | % | Opacity NP | — | Total revolutions of PDP over the cycle NP,i | — | Revolutions of PDP during a time interval n | min-1 | Engine speed np | 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 pa | kPa | Saturation vapour pressure of the engine intake air pA | kPa | Absolute pressure pB | kPa | Total atmospheric pressure pd | kPa | Saturation vapour pressure of the dilution air 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 Ω | — | Bessel constant Qs | m3/s | CVS volume flow rate q | — | Dilution ratio r | — | Ratio of cross sectional areas of isokinetic probe and exhaust pipe Ra | % | Relative humidity of the intake air Rd | % | Relative humidity of the dilution air 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 CFV flow τ | % | Smoke transmittance V0 | m3/rev | PDP volume flow rate at actual conditions 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

← anx_I__para__44 · All articles · anx_I__para__45 →

Source: EUR-Lex (Cellar) · retrieved 2026-11-01 · Text as adopted (Official Journal); later amendments are not incorporated in this text.