1. Exhaust Emissions Light Duty-PMP-2017/2018 Sub23nm Round Robin

2. About the exercise Measurement of a LD GDI vehicle in 8 laboratories
3 cold WLTC, 5 hot WLTC, 1 steady speed test
Objectives of the exercise is to
uncertainties PMP-23nm and PMP-10nm, the need of a catalytic stripper (CS) and data for sub23nm
APC
10 and , 23 nm cut-off, CS
SPCS
10 nm cut-off, CS
AM10
10 nm cut-off LabPMP
TSI23
23 nm cut-off, SPCS
TSI10
10 nm cut-off LabPMP

3. About the exercise Measurements conducted in 6 different laboratories
Switzerland and Japan to be done
Some problems with instruments and transportation
Yet
PN10 and PN23 Data with Heated Evaporation Tube and Catalytic Stripper (CS) from all of the laboratories (CS1 or CS2 )
Fuel (and other setup) transportation problems were always solved
Until now only results from PMP vehicle
The data shown is about variability between the laboratories

4. Average CO2 emission in (WLTP)
Things to do: recheck labs
normalization temperature
To be solved
Random order
CO2 variability, normalized to mean (100)
STD
Lab1
Lab2
Lab3
Lab4
Lab5
Lab6
HOT 2%
100 99 98
104
COLD 1%
101
102
Emissions normalized to mean
Reddish color |deviation| > std
DRAFT

5. PMP (heated tube) PN23 variability WLTP
COLD start
AVE ± STD
HOT start
AVE ± STD
PN Emissions normalized to mean
Reddish color |deviation| > std
Emissions normalized to mean, Lab5 background removed
Cond.
STD
Lab2
Lab3
Lab4
Lab5
Lab6
COLD START
19% 95
128
110 82 86
HOT START
12%
106
117 93 99
DRAFT

6. PMP (heated tube) PN10 variability WLTC
Issues with
LabPMP PCRF

7. Emissions normalized to mean, Lab2 excluded
PMP (heated tube) PN10 variability WLTC
HOT start
AVE ± STD
COLD start
Emissions normalized to mean, Lab2 excluded
Cond.
STD
Lab2
Lab3
Lab4
Lab5
Lab6
COLD START
19%
243
113
101
114 72
HOT START
16%
549
109 96
116 79
DRAFT

8. CS1 PN variability WLTC CS1 23nm variability, WLTC Lab2 Lab3 Lab4 Lab5
condition
STD
Lab2
Lab3
Lab4
Lab5
Lab6
COLD START
16% 86
124
109 95
HOT START
12%
119
105 96 91 90
CS1 10nm variability, WLTC
condition
STD
Lab2
Lab3
Lab4
Lab5
Lab6
COLD START
18% 78
114
107
117 85
HOT START 8%
113
103
100 93 92

9. Steady speeds DRAFT STD Lab2 Lab3 Lab4 Lab5 Lab6 2 100 98 99 104 3 102
CO2 variability
Speed/gear
STD
Lab2
Lab3
Lab4
Lab5
Lab6
100/4 2
100 98 99
104
120/5 3
102 96
100/3 1
50/2
Things to do: recheck labs
normalization temperature
DRAFT

10. PN measurement variability between labs
Steady speeds
Issues with
LabPMP PCRF,
to be solved…
Lab4 missing CS1 data
PN measurement variability between labs
Speed/
gear
PMP23
STD
CS 23
PMP10
CS 10
100/4
11%
13%
27%
14%
120/5 6%
10% 8%
100/3 4%
19% 5%
50/2
22% 7%
Lab5 excluded due to background problem
DRAFT

11. Conclusions 1/2
CO2 emissions so far 1% (cold) and 2% (hot WLTC) variability due to one lab (probably). Excluding this lab the variability decreases to <1% and <1%, respectively
Also steady tests at the lab showed elevated CO2
Reason for the deviation unclear, to be solved
PMP systems:
WLTC: Variability of 10nm results (16-19%) similar with 23nm (21-23%)
Steady: Variability of 10nm results (19-27%) higher than 23nm (5-11%)
CS1
WLTC: Variability of 10nm results (8-18 %) similar with 23nm (12-16%)
Steady: Variability of 10nm results (7-14%) similar with 23nm (6-13%)
PMP 10nm variability higher than CS1 10nm in steadys
Todo check if Lab2 PMP PCRF can be verified/corrected

12. Conclusions 2/2 PMP and CS1 systems comparison: WLTC and Steady:
EMISSIONS Generally at the same level
In one lab PCRF problem, and in another background problem
CS1 23nm (absolute) levels a bit lower than PMP23nm
CS1 10nm (absolute) levels a bit higher than PMP10nm

13. Next…
Some details to be verified from labs: recheck results. Analysis continued: Sub23nm, CS2, cycle phases
Exercise continues
Switzerland this month
Then all instruments collected to JRC, maintenance if needed
Then Japan

14. Any questions? Tero Lähde, Barouch Gieckhaskiel, Giorgio Martini ,