Working Paper No. WLTP-05-07e
WLTP Phase 1B
Open Issues Phase 1B <Number of Tests >
1. OIL# 27
2. Annex6 Section 1.1.1.2
3. Current description
The number of tests shall be determined as shown in
Figure A6/1. Ri1 to Ri3 describe the final measurement
results of three tests to determine gaseous and
particulate emissions compounds, carbon dioxide
emission, and fuel consumption, where applicable. L are
limit values as defined by the Contracting Parties.
4. Initial Proposal : 8th WLTP (2014_Fall) by Japan
5. Finalization : 12th WLTP (2015_Fall)
1
Current homologation process
CO2/FC Pollutants
UN/EU
USA
Japan
Up to three(3) times
depend on margin
One chance
One chance
4% role (up to three
times)
3% role (up to three
times)
Confirm declared
value
turning issues :
combined pollutants/FC procedure,
TMH/THL approach, others
homologation
Common
Weak for testing variability
Reduce testing burden
Pollutants
Increase failure risk
CO2/
FC
Decl
ared
Increase failure risk
Test
resul
ts
Hard to control official
value
Multiple tests
ISC
homologation
Strong for testing variability
Increase testing burden
Less failure risk
Less failure risk
Slightly hard to control
official value
ISC
Later stage
discussion
One shot test
Later stage
discussion
Points to be
discussed