1. WLTP-DTP Subgroup Additional Pollutants Progress report
Date: 17. Apr. 2012
WLTP-DTP-AP, Mörsch/Astorga

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

3. WLTP-DTP-AP, Mörsch/Astorga
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. 3 2 2 1 Additional pollutants: Request for Parameters’ list
For NO2 1 3
Other AP
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. 3 2 2 1 Additional pollutants Request for Parameters’ list
For NO2 1 3
Other AP
In VP2

8. Parameter list has been amended (Version03)
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
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. 3 2 2 1 Additional pollutants Request for Parameters’ list
for NO2 1 3
Other AP
In VP2

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. WLTP-DTP-AP-05-01 Table of candidate methods for additional pollutants
CDL: Chemiluminiscence Detector for NO2
QCL: Quantum Cascade Tunable Infrared Laser Differential Absorption Spectrometer (QC-TILDAS) for Measurements of Atmospheric Ammonia
LDS: Laser Diode (in situ and tunable); Ammonia slip lost or fall
NDIR non dispersive infra red
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. WLTP-DTP-AP-05-01 Table of candidate methods for additional pollutants
CDL: Chemiluminiscence Detector for NO2
QCL: Quantum Cascade Tunable Infrared Laser Differential Absorption Spectrometer (QC-TILDAS) for Measurements of Atmospheric Ammonia
LDS: Laser Diode (in situ and tunable); Ammonia slip lost or fall
NDIR non dispersive infra red
WLTP-DTP-AP, Mörsch-Astorga
WLTP-DTP-AP-05-01

19. Drafting of GTR for reference methods [*]
NO2 and NH3 based on OICA proposals
N2O, 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
AP-Work on-going
[*] Draft GTR proposal: WLTP-DTP-LabProcICE-112 (…)

20. Open Issues NH3 sampling during engine off
Temperature for NH3 sampling (110 – 190?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. (A table of candidate methods to be evaluated has been set up)
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
avoid raw measurement where possible

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)