1. WLTP DTP PM-PN Subgroup Activity Report
9th DTP Meeting / Bern
16th-18th April 2012
C. Hosier / C. Vallaude

2. PM/PN Subgroup DTP9 Bern 16-18th of April 2012
Overview
Open issues
Data to gather during validation 2
GTR drafting
Next meeting

3. PM/PN Subgroup DTP9 Bern 16-18th of April 2012
Open Issues
OIL => same as GRPE (Jan 2012)
OI left need input from VP2
PM-PN Parameter list => same as GRPE (Jan 2012)
commented to answer questions from VTF+PL 30th of March meeting

4. Data To Gather During Validation 2 (1/2)
PM/PN Subgroup DTP9 Bern 16-18th of April 2012
Data To Gather During Validation 2 (1/2)
PM filter conditioning
Minimum conditioning time required
Dilution tunnel pre-conditioning and background
Is 20 minutes pre-conditioning at 120kph sufficient?
Tunnel PN background levels
Experience on PN during DPF regeneration
To confirm PN measurement system is capable of excluding worst case volatile material during DPF regenerations
CVS and filter face temperatures during regenerations?
=> Integrated in parameter list and global test matrix

5. Data To Gather During Validation 2 (2/2)
PM/PN Subgroup DTP9 Bern 16-18th of April 2012
Data To Gather During Validation 2 (2/2)
Ki determination
Mode construction
PM-PN parameter list
PN during regeneration
Vehicles
Will need regen indicator and inhibitor switch
Measure PN before, during and after regeneration
Different PN measurement systems
Two systems per lab sampling in parallel
Impact of VPR pcrf
Test over range from (one system at high, one at low setting each test)
Two tests at each pcrf setting
Impact of CVS dilution on nucleation mode particles
Test at max and min CVS dilution
DPF fill procedure
Either fast loading on engine dyno or on vehicle loading
Follow R83 advice on fill state stabilisation for pre-regen tests
VPR sulphate removal capability
Test with highest sulphur lube oil permitted by OEM and fuel at maximum (10/15mg/kg) sulphur limit
Tested by JRC and ACEA

6. PM/PN Subgroup DTP9 Bern 16-18th of April 2012
GTR Drafting
PM/PN GTR draft integrated by DC in the global GTR Draft in March 2012
Drafting audioconf on the 23td of March to validate the text and answer DC questions
=> 3 minor new OI opened
Retain or not guidance of filter handling
Add a zero span procedure for the balance?
Precision of when the PN measurement should be started

7. PM/PN Subgroup DTP9 Bern 16-18th of April 2012
Next Meeting
Next meeting:
Webconf on the 15th of May 2012
Agenda:
New OI from drafting
Start on calibration procedure
If available have a first look at the validation 2 outputs
Organization of VP2 data analysis

8. Thank you for your attention
PM/PN Subgroup DTP9 Bern 16-18th of April 2012
Thank you for your attention