WLTP-12-09e
Drafting proposals for the purpose of
- clarifying postprocessing steps for CO2 and emission values (task from drafting TF)
- allow for clear references of results (task from Admin-WG)
- give an overview on options at beginning (new, for road load methods)
WLTP-12-09e
Annex 4
3.
General requirements
 new paragraph 3.3.
3.3.
Road load determination methods
The table A4/0 shows an overview of possible methods for road load determination and the
references to the road load coefficients as their test result, without prejudice of specific
requirements regulated in this Annex.
No. Method
1
2
3
Measurement and calculation of total
resistance by the coastdown method
Alternatives within method: Split runs.
Coastdown method with on-board
anemometry
Alternatives within method: Position of
anemometer.
Measurement of running resistance using
the torque meter method
Reference Reference road load
to method to result
coefficients
4.3.1.
4.3.1.4.5.
f0, N
and 4.5.
f1, N/(km/h)
f2, N/(km/h)²
4.3.2.
4.3.2.6.7.
and 4.5.
f0, N
f1, N/(km/h)
f2, N/(km/h)²
4.4.
4.4.4. and
4.5.
c0, Nm
c1, Nm/(km/h)
c2, Nm/(km/h)²
f0, N
f1, N/(km/h)
f2, N/(km/h)²
f0, N
f1, N/(km/h)
f2, N/(km/h)²
f0, N
f1, N/(km/h)
f2, N/(km/h)²
4
- if 8.2.4. has been performed
5
Method for the calculation of default road
load based on vehicle parameters
5.
5.2.
6
Wind tunnel method
6.
6.7.3.
[7
Alternatives within method: Flat belt or
chassis dynamometer, stabilized or
deceleration method, alternative warm-up.
placeholder extrapolation method
tbd
tbd
f0, N
f1, N/(km/h)
f2, N/(km/h)²]
WLTP-12-09e
Annex 7 Calculations
1.
General requirements
1.1.
Calculations related specifically to hybrid and pure electric vehicles are described in
Annex 8.
1.2.
The calculations described in this Annex shall be used for vehicles using combustion
engines.
1.3.
The final test results shall be rounded in one step to the number of places to the right
of the decimal point indicated by the applicable emission standard plus one additional
significant figure. Intermediate steps in the calculations shall not be rounded.
[...]
 New paragraph 1.7.
1.7.
Stepwise prescription for calculating the final test results
Table 7/0 shows an example, how single tests deliver the final values of an individual vehicle.
Table 7/0
Table 7/1
test 1, vehicle L
[test 2, vehicle L]
[test 3, vehicle L]
test 1, vehicle H
[test 2, vehicle H]
[test 3, vehicle H]
Table 7/2 A-B
Table 7/2 C
Table 7/3
vehicle L
interpolation line
input
criteria emission
results
individual
vehicle
vehicle H
The results shall be calculated in the order described in the Tables 7/1 up to and including
7/3. The intermediate and final results per line in the column "Output" shall be recorded.
Table 7/1
Source
Annex
6
Input
Raw test results
Process
Mass emissions
Annex 7, 3. to 3.2.2.
Calculate combined value
of criteria emissions:
∑p Mi,p,5 × dp
Mi,c,6 =
∑p dp
where:
criteria emission i without
CO2;
dp are the target distances
of the applicable cycle
phases, p.
Output
MCO2,p,1 for every
cycle phase p,
g/km;
Mi,c,1 for every
criteria emission i,
g/km.
step
no.
1
WLTP-12-09e
output
step 1
output
step 1
and
step 2
MCO2,p,1 for every cycle
phase p, g/km.
MCO2,p,2 for every cycle
phase p, g/km;
Mi,c,1 for every
emission component i
without CO2, g/km.
RCB correction
Annex 6, Appendix 2
Emissions test procedure
for all vehicles equipped
with periodically
regenerating systems
Annex 6, Appendix 1.
output
step 3
output
step 4
output
step 4
and
step 5
MCO2,p,3 for every cycle
phase p, g/km;
Mi,c,3 for every
emission component i
without CO2, g/km.
Placeholder for additional
corrections, if applicable.
MCO2,p,4 for every cycle
phase p, g/km;
Mi,c,4 for every
emission component i
without CO2, g/km.
MCO2,p,4 for every cycle
phase p, g/km;
Mi,c,4 for every
emission component i
without CO2, g/km;
FCp,5 for every cycle
phase p, l/100km.
Calculation of fuel
consumption.
Otherwise: Mi,p,4 = Mi,p,3
MCO2,p,2 for every
cycle phase p,
g/km;
MCO2,p,3 for every
cycle phase p,
g/km;
Mi,c,3 for every
emission
component i without
CO2, g/km.
2
MCO2,p,4 for every
cycle phase p,
g/km;
Mi,c,4 for every
emission
component i without
CO2, g/km.
FCp,5 for every cycle
phase p, l/100km.
4
Mi,c,6 for every
emission
component i, g/km;
FCc,6, l/100km;
6
3
5
Annex 7, 6.
Calculation of combined
cycle values:
∑p MCO2,p,5 × dp
MCO2,c,6 =
∑p dp
∑p FCp × dp
FCc,6 =
∑p dp
where:
dp are the target distances
of the applicable cycle
phases, p.
including phase
results:
MCO2,p,6 for every
cycle phase p,
g/km;
FCp,6 for every cycle
phase p, l/100km.
"single
test
result"
WLTP-12-09e
Table 7/2
Source
"single test
result" from
Table 7/1
Input
For every test:
Mi,c,6 for every
emission
component i, g/km;
FCc,6, l/100km;
MCO2,p,6 for every
cycle phase p,
g/km;
FCp,6 for every
cycle phase p,
l/100km.
step A and
MCO2,c,7, g/km;
manufacturer MCO2,p,7 for every
declaration
cycle phase p,
g/km;
FCc,7, l/100km;
FCp,7 for every
cycle phase p,
l/100km; and
declared value:
MCO2,c g/km
steps A and
For each of the
B
test vehicles H and
L:
Mi,c,7 for every
emission
component apart
from CO2 i, g/km;
MCO2,c g/km;
MCO2,p for every
cycle phase p,
g/km;
FCc, l/100km;
FCp for every cycle
phase p, l/100km.
Process
Averaging of test
results, if applicable.
Reference TBD.
Application of the
declared value.
Reference TBD.
If in addition to a test
vehicle H a test
vehicle L was tested,
the resulting criteria
emission values of L
and H shall be the
average and are
referred to as Mi,c.
For CO2 and FC the
values derived in
step B apply.
CO2 values shall be
rounded to [two]
decimal places;
FC values shall be
rounded to [three]
decimal places.
Output
Mi,c,7 for every
emission
component i,
g/km;
MCO2,p,7 for every
cycle phase p,
g/km;
FCc,7, l/100km;
FCp,7 for every
cycle phase p,
l/100km.
step no.
A
MCO2,c g/km;
MCO2,p for every
cycle phase p,
g/km;
FCc, l/100km;
FCp for every
cycle phase p,
l/100km.
B
Mi,c, for every
criteria emission
component i,
g/km;
MCO2-H,c g/km;
MCO2-H,p for every
cycle phase p,
g/km;
FCH,c l/100km;
FCH,p for every
cycle phase p,
l/100km;
and if a vehicle L
was tested:
MCO2-L,c g/km;
MCO2-L,p for every
cycle phase p,
g/km;
FCL,c l/100km;
FCL,p for every
cycle phase p,
l/100km.
C
"interpolation
family result"
final criteria
emission
result
WLTP-12-09e
Table 7/3
Source
"interpolation
family result"
from Table
7/2
Input
MCO2-H,c g/km;
MCO2-H,p for every
cycle phase p,
g/km;
FCH,c l/100km;
FCH,p for every
cycle phase p,
l/100km;
MCO2-L,c g/km;
MCO2-L,p for every
cycle phase p,
g/km;
FCL,c l/100km;
FCL,p for every
cycle phase p,
l/100km.
Process
Fuel consumption
and CO2 calculations
for individual vehicles
in an CO2
interpolation family
Annex 7, 3.2.3.
[CO2 values shall be
rounded to full g/km;
FC values shall be
rounded to one
decimal place.]
 Open points:
Additional steps for emissions needed?
Also table needed for:
Annex 7, 3.3. Mass of particulate matter emissions
Annex 7, 4. Determination of PN
Output
MCO2-ind g/km;
MCO2-ind,p for
every cycle
phase p, g/km;
FCind l/100km;
FCind,p for every
cycle phase p,
l/100km.
step no.
"result of an
individual
vehicle"
final CO2
and FC
result