WLTP-DTP Subgroup Additional Pollutants Progress Report April Progress report. Date: 17. Apr WLTP-DTP-AP, Mörsch/Astorga

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1 WLTP-DTP Subgroup Additional Pollutants Progress report Date: 17. Apr WLTP-DTP-AP, Mörsch/Astorga

2 2 Additional pollutants: Request for Parameters list 1 Parameters list For NO2 2 Other AP 3 In VP2

3 Meeting schedule First Meeting: Telephone/Web Conference 20th July participants 2nd Meeting: Telephone/Web Conference 20th July participants 3rd Meeting: Face to face meeting at JRC/Ispra 9/10 Dec participants 4th Meeting: Face to face meeting at BMW/Munich 7/8 March participants 5th Meeting: Face to face meeting at JRC/Ispra 10/11 Mai participants 6th Meeting: Telephone/Web Conference 09th Dec participants WLTP-DTP-AP, Mörsch/Astorga

4 2 Additional pollutants: Request for Parameters list 1 Parameters list For NO2 2 Other AP 3 In VP2

5 Request to prepare parameter list for further additional pollutants Issue was discussed within group: Agreed that only NO2 should be required from all labs in VP2 Reasons: most labs do not have instrumentation or instrumentation is not available for other APs reference fuel E5 measurement of EtOH and Aldehydes not meaningful WLTP-DTP-AP, Mörsch/Astorga

6 The AP sub-group wanted to encourage all labs to deliver as many compounds of the additional pollutants list as they can & the results will be analyzed during validation phase 2.

7 2 Additional pollutants Request for Parameters list 1 Parameters list For NO2 2 Other AP 3 In VP2

8 NO measurement from Bag After discussion of pros and cons it was decided to retain the possibility of bag measurement of NO for VP2. All participating labs should measure both ways (bag and dilute modal). Parameter list has been amended (Version03) WLTP-DTP-AP, Mörsch/Astorga

9 Parameter List for NO2 measurements (AP) Version 03 # Item Set Point Variations Remarks 1 Sampling 1.1 sample point from diluted exhaust bag all Labs should measure continous modal and bag sampling continuous dilute modal bag all Labs should measure continous modal and bag 2 Analysis 2.1 Analyzer CLD in NO-mode UV-RAS, QLC in NOmode UV-RAS, QLC in NO2- mode UV-RAS and QLC allow direct measurement of NO2 3 Calculation 3.1 density of NO 3.2 density of NO2 3.3 density of NOx K and kpa K and kpa K and kpa 4 Calibration 4.1 Calgas NO in N2 NO2 in N2, if direct measurement of NO2 WLTP-DTP-AP, Mörsch/Astorga

10 Qualitative assessment parameters for validation phase 2 NO-measurement All participating labs should measure both ways (bag and dilute modal). -All measurements: - Absolute difference between dilute and modal measurement -Repeat tests: - Variability of NO result compared to NOx-measurement - Variability of NO result from bag measurement versus dilute modal WLTP-DTP-AP, Mörsch/Astorga

11 2 Additional pollutants Request for Parameters list 1 Parameters list for NO2 2 Other AP In VP2 3

12 Labs may use existing equipment for NH3 or N2O Report setup/analyzers used and experiments quite in detail Further decision will be based on results of VP2

13 Table of candidate methods for additional pollutants bag diluted raw online off line LoD [ppm] LoQ [ppm] rise time [s] interference Robustness of measurement Pollutant Method Base Paper Nr. NO2 CLD differential x x ECE Reg. 83/EPA very good WLTP-DTP-02-06e NDUV-RAS differential x x ECE Reg. 83/EPA good WLTP-DTP-02-06e QCL x x not yet available WLTP-DTP-AP FTIR x x fair N2O GC-ECD x x EPA good WLTP-AP b NDIR x x EPA poor WLTP-AP b QCL x x not yet available WLTP-DTP-AP FTIR x x EPA poor ring down cavity x x? Photo Acoustic x x EPA poor NH3 LDS (in situ) x x Commitology EUVI fair WLTP-DTP-02-07e (SCR systems) LDS (extractive) x x Commitology EUVI fair FTIR x x Commitology EUVI fair WLTP-DTP-02-07e QCL x x not yet available WLTP-DTP-AP Ethanol Impinger + GC-FID x x CARB NMOG Part C METHOD 1001 EPA good (E85) Photo Acoustic x x MSO good QCL not yet available FTIR? Aldehydes Impinger/Cartridge + HPLC x x CARB NMOG Part F METHOD 1004 good WLTP-DTP-AP (E85) FTIR x x poor QCL? x not yet available reference methods LoD determined by use of traceable cal. gases General: EPA WLTP-DTP-AP, Mörsch-Astorga WLTP-DTP-AP-05-01

14 Qualitative assessment parameters for validation phase 2 N2O-measurement Use of two (or more) different systems in parallel (e.g. QCL, GC-ECD, FTIR, ) Cal Gas: 5 ppm of N2O in N2 (+/- 2%) -All measurements: - repeatability of air bag measurement - difference in result of the two systems - stability of calibration (apply cal gas before and after test) -Repeat tests: - Variability of N2O result WLTP-DTP-AP, Mörsch/Astorga

15 Qualitative assessment parameters for validation phase 2 NH3-measurement NH3 only for Diesel with SCR take care of extracted sample measurement of two systems in parallel (e.g. QCL and FTIR ) use of different sampling systems one with smallest possible Volume, shortest possible line length one with larger Volume and line length where available, use in situ system in parallel -All measurements: - compare average concentration result - Compare traces of the systems - incidence of first peak - rise time - drag -Repeat tests: - Variability of NH3 result WLTP-DTP-AP, Mörsch/Astorga

16 Request to include EtOH Request to OICA to include one FFV (one lab) Request to suppliers to make available online systems for EtOH All systems measure in parallel NMOG Online systems for Aldehydes are under development but not yet available WLTP-DTP-AP, Mörsch/Astorga

17 TABLE OF CANDIDATE METHODS FOR ADDITIONAL POLLUTANTS

18 Table of candidate methods for additional pollutants bag WLTP-DTP-AP, Mörsch-Astorga diluted raw online off line LoD [ppm] LoQ [ppm] rise time [s] interference Robustness of measurement Pollutant Method Base Paper Nr. NO2 CLD differential x x ECE Reg. 83/EPA very good WLTP-DTP-02-06e NDUV-RAS differential x x ECE Reg. 83/EPA good WLTP-DTP-02-06e QCL x x not yet available WLTP-DTP-AP FTIR x x fair N2O GC-ECD x x EPA good WLTP-AP b NDIR x x EPA poor WLTP-AP b QCL x x not yet available WLTP-DTP-AP FTIR x x EPA poor ring down cavity x x? Photo Acoustic x x EPA poor NH3 LDS (in situ) x x Commitology EUVI fair WLTP-DTP-02-07e (SCR systems) LDS (extractive) x x Commitology EUVI fair FTIR x x Commitology EUVI fair WLTP-DTP-02-07e QCL x x not yet available WLTP-DTP-AP Ethanol Impinger + GC-FID x x CARB NMOG Part C METHOD 1001 EPA good (E85) Photo Acoustic x x MSO good QCL not yet available FTIR? Aldehydes Impinger/Cartridge + HPLC x x CARB NMOG Part F METHOD 1004 good WLTP-DTP-AP (E85) FTIR x x poor QCL? x not yet available reference methods LoD determined by use of traceable cal. gases General: EPA WLTP-DTP-AP-05-01

19 Drafting of GTR for reference methods [*] AP-Work on-going NO 2 and NH 3 based on OICA proposals N 2 O, Ethanol and Aldehydes based on existing legislation Gathering of performance data for candidate methods Tasks have been assigned within group and will be performed until next meeting [*] Draft GTR proposal: WLTP-DTP-LabProcICE-112 ( )

20 Open Issues NH3 sampling during engine off Temperature for NH3 sampling ( ?C) proposal: set point between 110 C and 190 C with range of +/- 10 K JAMA position: between 110 and 133 due to decomposition of urea

21 Open Issues (2) Traceability to national standards of cal gas for AP DTP gas industry difficulties for NH3, EtOH to be expected, achievable accuracy/stability has to be established WLTP-DTP-AP, Mörsch/Astorga

22 Ref.: CIRCA documents WLTP-DTP-AP Draft GTR proposal: WLTP-DTP-LabProcICE-101 & open questions: WLTP-DTP-AP Open Issues THANKS FOR YOUR ATTENCION C. Astorga

23 General guidelines agree on performance criteria LoD cross interference (A table of candidate methods to be evaluated has been set up) allow alternative methods (and factors) based on existing legislation where suitable

24 Definitions for THC, NMHC and NMOG have been agreed (Alignment with ICE lab group is needed) THC: total Hydrocarbons (All compounds measurable by FID) NMHC: Non-methane hydrocarbons (THC excluding CH4 and ROH, response factors are applied) NMOG: Non-methane organic gases (NMHC plus ROH and RHO)