1. Status report / Activity Plan of Evap Task Force
WLTP-17-11e
Status report / Activity Plan of Evap Task Force
10th Jan., 2017
M. Morimoto (JASIC)

2. Get GRPE approval of EVAP GTR w/o sealed tank sys. test procedure.
Status & Schedule
Submit Evap GTR without sealed tank system test procedure & Technical Report to GRPE in January 2017.
Sealed tank system test procedure will be discussed in following schedule.
2016
2017
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
GRPE
IWG TF
12-13
#74 GRPE XX
#75 GRPE
Get GRPE approval of EVAP GTR w/o sealed tank sys. test procedure.
5-7
WLTP
#16 10
WLTP
#17 XX
WLTP
#18 XX
WLTP
#19
TODAY
IWG approved EVAP GTR w/o sealed tank sys. test procedure
Get IWG approval of EVAP sealed tank sys. test procedure. 31
Web
wk20?
Web
wk20?
Web
TBD
Face 2 Face?

3. Feature of Sealed Tank System
② Open before refueling
Puff loss Canister
Relief Pressure Valve
① Kept closed during parking
Loading process for sealed tank need to represent the vapor flow through ② , NOT ① ② ①
① No fuel vapor flow into the canister during parking because the control valve kept closed.
② Fuel vapor into the puff loss canister only before refueling.
(The relief pressure valve opens when the refueling event starts, then closes after tank pressure goes down.)

4. Discussion points of Sealed Tank System Test Procedure
Non Sealed Tank System Test procedure
Sealed Tank System Test Procedure
Fuel drain and refill
Pre-conditioning
23 +/- 3 °C
Soak A
“A series of procedure” OR
“Separate procedure for puff loss loading volume”
2g breakthrough to be replaced by puff loss loading.
15% refill
Drain and refill
by opening fuel lid and/or cap
Tank pressure relief
2g breakthrough
Canister loading
85% fuel consumed equivalent
Canister purge
temperature, duration,,,
Soak inside SHED
loading by opening the fuel lid
overflow vapor
40% refill to be consisted with non-sealed system
Fuel drain and refill
OVC-HEV only
Battery fully charge
2g breakthrough
Canister loading
WLTC purge cycle
Test drive
Min 23 °C / Max 31 °C for 60 min
Hot Soak
23 +/- 3 °C
Soak
Start 20 °C to Max 35 °C 24 hrs for 2days
1st and 2nd day Diurnal B C D
Relief Pressure Requirement for Sealed Tank System

5. Main Proposals & Comments from TF members
Discussion
points
EC Proposals
JAPAN Positions
(Ref) Comments from other Parties
A: Test sequence
a series of procedure
separate procedure
(one for measuring puff loss loading volume,
another one is identical to non sealed tank )
B: Condition before puff loss loading
6 to 36 hrs soak at 35°C
same profile as DBL
(expert) ensure that all vapor vent through the canister
C: Overflow vapor
need to regulate
(measure by connecting 2nd canister) 
(expert) overflow vapor should be measured in the SHED
D: Relief Pressure Requirement
tank temp. : 40 °C
fuel : RVP=70KPa
no canister weight Room temp. : 35°C
Fuel : RVP=75kPa Test cycle : LMHM with CS
(expert)
fuel temp. : 20-40°C
fuel volume : 40%
fuel : RVP=70 kPa
(OICA) using winter fuel at temperatures in summer makes no sense
Refer to appendix for more details

6. END