WLTP-12-13e
September 2015
Drafting Subgroup
Audio/Web Meeting
14.03.2016
1
• These slides are based on the status of the GTR as of late
August/early September, 2015.
• The set of slides includes those submitted by BMW and
the additional pollutants task force.
14.03.2016
2
I. Statement of technical rationale and
justification
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3
September 2015 drafting meeting: Entire sentence deleted.
Introduction, paragraph 5
OPEN POINT: 5. March
2015 drafting meeting.
Japan proposes
deleting the whole
sentence or delete
"fuel cells".
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4
II. Text of the global technical regulation
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5
September 2015 drafting meeting: n/v remains;
ndv (= n divided by v) remains.
II. 5. General requirements, Interpolation family
§5.6.1., 5.6.3., 5.7.
(d) n/v ratios (engine rotational speed divided by vehicle speed). This
requirement shall be considered fulfilled if, for all transmission ratios
concerned, the difference with respect to the transmission ratios of the
most commonly installed transmission type is within 8 per cent;
Text from H. Steven:
Task: Harmonisation in the use of n/v throughout the GTR
14.03.2016
6
September 2015 drafting meeting:
will be reviewed during the next EV
sessions.
II. 5. General requirements, §5.6.2. Interpolation
family for NOVC-HEVs and OVC-HEVs
Task: The paragraph must be reviewed, especially concerning the
references to the UN Regulations.
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7
September 2015 drafting meeting: will be reviewed during the next EV
sessions. 5.6.3.(g) also rewritten to harmonise with 5.6.1.(d)
II. 5. General requirements, §5.6.3. Interpolation
family for PEVs
Task: The paragraph must be reviewed, especially concerning the
references to the UN Regulations.
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8
September 2015 drafting meeting: EV yet to discuss this.
II. 5. General requirements, §5.7. Road load family
Task: Text proposal expected (M. Nägeli)
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9
II. 3. Definitions
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10
Definitions (mass) §3.2.d.
September drafting meeting: the first 3.2.d. in the gtr is adopted.
PROPOSAL:
3.2.d. "Test mass of the vehicle" means the sum of the actual mass of the vehicle,
25 kg and mass representative of the vehicle load.
JPN: we thought it was decided like,
3.2.d.“Test mass of the vehicle” means the sum of the mass of the vehicle in running order and its actually fitted
optional equipment plus 25 kg and the mass representative of the vehicle load;
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11
September 2015 drafting meeting:
WLTP GTR DRAFTING ISSUES
TEXT OF GTR, DEFINITIONS, § 3.2.14. BMW #1 Currently being discussed in the
road load task force; still under
review.
Change text:
"Simulated road load" means the road load applied to the vehicle on a chassis dynamometer and is the
sum of the losses of the vehicle itself plus the applied force of the dynamometer .
Justification:
 "simulated" is only used in the context of simulating road load on a chassis dyno and refers to the total road load,
the vehicle is exposed to on a dyno (RR and drivetrain losses of the vehicle plus applied force by the chassis dyno).
 Definition unclear  improve.
WLTP Drafting, BMW, 18.08.2015
WLTP GTR DRAFTING ISSUES
TEXT OF GTR, DEFINITIONS, §3.5.8. BMW #2
September 2015 drafting meeting:
Appears not to have been wrapped
up.
Change 3.5.8.:
3.5.8. "Mode" means a distinct driver-selectable condition which affects emissions, or fuel or
energy consumption.
Justification:
 "Modes" that do not effect emissions should not be considered (e.g. "night mode" of dashboard).
WLTP Drafting, BMW, 18.08.2015
Definitions, §3.3.10.
September 2015 drafting meeting:
To be discussed.
Current GTR Text:
3.3.10. "Energy storage system" means the part of the powertrain on
board a vehicle that can store chemical, electrical or mechanical energy
and which can be refilled or recharged externally and/or internally.
Proposal from W. Coleman:
3.3.10. "Energy storage system" means the part of the powertrain on board a
vehicle that can store chemical, electrical or mechanical energy and release it
in the same form as it was input which can be refilled or recharged externally
and/or internally.
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14
Definitions, §3.3.14.
September 2015 drafting
meeting: To be discussed.
GTR Text:
3.3.14. "Hybrid electric vehicle" means a vehicle using at least one fuel
consuming machine and one electric machine for the purpose of
vehicle propulsion.
Proposal from W. Coleman:
3.3.14. "Hybrid electric vehicle" means a hybrid vehicle where one of
the energy converters is an electric machine.
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15
Definitions, §3.3.xx.
September 2015 drafting meeting:
To be discussed.
GTR Text:
3.3.xx. "Hydrogen fuel cell vehicle" means a vehicle powered by a fuel
cell that converts chemical energy from hydrogen into electric energy,
for propulsion of the vehicle.
Task: Approval of the definition. (identical to the definitions in ECE-R 101
and ECE-R 83)
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16
Definitions, §3.4.1.
September 2015 drafting
meeting: adopted.
Current GTR:
3.4.1. "Manual transmission" means a transmission where gears are
shifted by hand in conjunction with a manual disengagement of a
clutch.
Proposed definition (A. Feucht):
3.4.1. "Manual transmission" means a transmission where gears can
only be shifted by action of the driver.
Reasoning: There are vehicles (smart, A2,…) where gears can only be
shifted by action of the driver but where no manual disengagement of
the clutch is necessary because the clutch is automated.
Task: Approval of the proposed definition.
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17
Annex 1
WLTC
March 22, 2015
18
WLTP DRAFTING, ANNEX 1
WLTC DIAGRAMS BMW #4
September 2015 drafting meeting:
Have been sent, have yet to be
incorporated.
Old text:
Annex 1
 Change diagrams, that the start and end exactly at the phase limits (see arrows).
 Or: Change text, that it takes the table as the only valid reference and the diagrams
just as "information".
Page 19
WLTP Drafting TF, BMW, 19.06.2015
September 2015 drafting meeting:
still under discussion.
WLTP GTR DRAFTING ISSUES
ANNEX 1, DOWNSCALING, ADDITIONAL PROVISIONS, §8.4.2. BMW #5
Should provision for capped speed of electrified vehicles be used
as well for ICE vehicles?
WLTP Drafting, BMW, 18.08.2015
Annex 2
Gear selection, shift point
determination
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21
WLTP GTR DRAFTING ISSUES
ANNEX 2, §2.(H), GEARSHIFTING. BMW #6
September 2015 drafting
meeting: see comments from
Japan on the next slide.
Add sentence in paragraph 2. of Annex 2:
...equally spaced.
The power curve shall be determined according to Regulation No. 85. If the required data sets (n,
Pwot) are not included already, they shall be added to the [regional] approval according to Regulation
No. 85.
Clearly define the source of the used full load curve.
The full load curve shall be part of the approval (if not already).
Is the application of R85 a regional issue or can be referred to R85 within the GTR?
WLTP Drafting, BMW, 18.08.2015
WLTP GTR DRAFTING ISSUES
ANNEX 2, §2.(H), GEARSHIFTING. BMW #6
September 2015 drafting meeting:
Comments from Japan adopted.
JPN:
Better to be in line with definition 3.7.1. (i.e. add “current regional regulation” to proposal, or delete
“current regional regulation” from 3.7.1.)
3.7.1. "Rated engine power" (Prated) means maximum engine power in kW as per the certification
procedure based on current regional regulation. In the absence of a definition, the rated engine power
shall be declared by the manufacturer according to Regulation No. 85.
WLTP Drafting, BMW, 18.08.2015
Gear selection, §2.(j)(e)
September 2015 drafting meeting:
Basically accepted but Rob Gardner to
check the wording.
Task: Clarification of the highlighted text.
Within a period of 5 minutes, the vehicle, having the mass defined in the
equation below, shall be able to pull away from standstill on an uphill gradient
14.03.2016of at least 12 per cent in 2nd gear on five separate occasions, pulling away
24
Gear selection, §2.(j)(e)
September 2015 drafting meeting:
Adopt (8) but not (9). Correlate with
GTR j.(5). Already in the GTR as a
definition.
JPN:
Definition of gross train mass or gross vehicle mass or max. trailer mass are
missing. The definition of 1230/2012 could be used.
(8) ‘technically permissible maximum laden mass of the combination’ (MC) means
the maximum mass allocated to the combination of a motor vehicle and one or
more trailers on the basis of its construction features and its design performances
or the maximum mass allocated to the combination of a tractor unit and a semitrailer;
(9) ‘technically permissible maximum towable mass’ (TM) means the maximum
mass of one or more trailers that may be towed by a towing vehicle which
corresponds to the total load transmitted to the ground by the wheels of an axle or
a group of axles on any trailer coupled to the towing vehicle;
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25
Annex 4
Road load and
dynamometer setting
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26
September 2015 drafting meeting: R. Cuelenaere to resend
mails to these subjects. DC to incorporate accordingly.
Information: The Annex 4 Task Force is reviewing all of Annex 4 but it has been
requested to examine at the request of DC paragraphs 4.2.1.7.3.; 4.3.1.3.2.;
4.3.1.3.4.; 4.3.2.6.6.; 4.5.5.1.; 8.1.3.2.1.; and 1.1., 1.2. and 2.2. of Annex 4,
Appendix 1.
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September 2015 drafting meeting:
WLTP GTR DRAFTING ISSUES
ANNEX 4, §3.2. WIND TUNNEL CRITERIA. BMWText
#7 below 3.2. deleted.
Introductory sentence added. See
gtr.
Delete text below 3.2.
3.2.
Wind tunnel criteria
 All parts of the GTR using the criterion, are describing very clear for what and how to use them (see below).
 The current sentence is even wrong, because now used for wind tunnel method as well.
WLTP Drafting, BMW, 18.08.2015
WLTP DRAFTING, ANNEX 4, §3.2.8.
WIND TUNNEL CRITERIA, CP
Old text:
New text:
Annex 4, 3.2.8.
Annex 4, 3.2.8., "cp"
September 2015 drafting meeting:
Blue box approved.
2 per cent in the equation replaced
by 0.02. Reference to “per cent” in
the text above it also replaced.
The absolute difference of the pressure coefficient, cp, over a distance
2 metres ahead and 2 metres behind the vehicle and at a height of the
center of jet shall not deviate more than ± 1 per cent
Task: Text to the right
yet to be approved.
Request of Japan, to define height.
It is not correct, to measure +/-2 meters to the balance center, as this
would be not the criteria to be checked (has to be the vehicle!).
Page 29
WLTP Drafting TF, BMW, 19.06.2015
WLTP GTR DRAFTING ISSUES
ROAD LOAD, §4.2.1.3.3. BMW #3
September 2015 drafting
meeting: Adopted, GTR modified
accordingly.
Put new sub-paragraphs at the sentences shown
4.2.1.3.4.
Energy range and transmission worst case
4.2.1.3.5.
Calculation of H and L of interpolation family
WLTP Drafting, BMW, 18.08.2015
September 2015 drafting meeting: Use version 6 as benchmark but
7.2.1. is still not complete. A. Feucht to make a concrete proposal.
Annex 4, Road load, §7.2.1. Inertia mass
setting (page 1 of 2)
The equivalent inertia mass of the chassis dynamometer shall be set to
the test mass if a dual-axis chassis dynamometer is used. In the case
that a single-axis chassis dynamometer is used where one axle is not
accelerated by the vehicle, the equivalent inertia mass shall be
increased either by the equivalent effective mass of the standing
wheels or by 1.5 per cent of the sum of the mass in running order and
25kg.
Task: Section to be reviewed (During June drafting meeting:, C. Lueginger offered
to review the section)
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31
EXPERT PROPOSAL:
June drafting meeting: approval of the text in yellow and red.
C. Lueginger to review this section
Annex 4, Road load, §7.2.1. Inertia mass
setting (page 2 of 2)
Task: Section to
be reviewed
(During June
drafting meeting,
C. Lueginger
offered to review
the section)
14.03.2016
The equivalent inertia mass of the chassis dynamometer shall be set to
the test mass if a dual-axis chassis dynamometer is used. In the case
that:
- a single-axis chassis dynamometer is used
- a dual-axis chassis dynamometer where one axle is not
accelerated by the vehicle
- a dual-axis chassis dynamometer where the two axles are
accelerated by the vehicle, but the axle with the drivetrain is
completely disconnected with the second axle,
the equivalent inertia mass shall be increased either by the equivalent
effective mass of the standing wheels or by 1.5 per cent of the sum of
the mass in running order and 25kg.
32
WLTP DRAFTING, ANNEX 4, §7.2.1.
September 2015 drafting meeting:
ROTATIONAL MASSES
Old text:
New text:
Annex 4
Annex 4
7.2.1. Inertia mass setting
The equivalent inertia mass of the chassis dynamometer shall be set to
the test mass if a dual-axis chassis dynamometer is used. In the case
that:
(a) a single-axis chassis dynamometer is used;
(b) a dual-axis chassis dynamometer where only one axle is used for
representing the inertia;
June drafting: Has to be
redone. Place on hold.
July: still in progress.
the equivalent inertia mass shall be increased either by the equivalent
effective mass of the standing wheels or by 1.5 per cent of the sum of
the mass in running order and 25 kilograms. If the chassis
dynamometer is not capable to meet the inertia setting exactly, the next
higher inertia setting shall be applied with a maximum increase of
10 kg.
 Adding 1.5 % not depending on the dyno directly, but on the situation, that one
axle is not taken into account. So also on a two axle dyno driven with one axle
only.
 Proposal shall consider of any case, that 1.5% are added in the case one axle is
not considered for inertia.
Page 33
WLTP Drafting TF, BMW, 19.06.2015
WLTP GTR DRAFTING ISSUES
ANNEX 4, §8. CHASSIS DYNO SETTING. BMW #10
September 2015
drafting meeting:
proposed change
adopted. Text
incorporated in GTR
as proposal.
Change 8.1.
8.1.
Chassis dynamometer setting by the coastdown method
This method is applicable when f0, f1, f2 values (N, N/(km/h), N/(km/h)²)
have been determined.
"Normal" chassis dyno setting to be applied not only in the case of coast down
testing, but also for wind tunnel testing, calculated values, extrapolation method
or torque meter method, if f0, f1, f2 values have been determined.
The text should reflect, that this method is applicable, if "normal" road load values
are available.
WLTP Drafting, BMW, 18.08.2015
WLTP GTR DRAFTING ISSUES
ANNEX 4, §8.2.4. TORQUE METER METHOD.
BMW #8
 New first paragraph in 8.2.4.
8.2.4.
If the vehicle does not coast down in a repeatable manner and a
coast down mode according to paragraph 4.2.1.7.5. is not feasible, the
determination as well as the use of f0, f1, f2 values may be omitted and
paragraph 8.2.4.1. applies. In any other case the procedure described in
paragraphs 8.2.4.2. to 8.2.4.3. shall be performed.
8.2.4.1.
f0' = c0 / r
f1' = c1 / r
f2' = c2 / r
where:
c0, c1, c2
are the running resistance coefficients determined in paragraph
4.4.4. of this Annex, Nm, Nm/(km/h), Nm/(km/h)²;
r
is the dynamic tyre radius of the vehicle with which the running
resistance was determined, m.
September 2015 drafting
meeting: Adopted, text
incorporated into the GTR as
proposal.
The determined f0', f1', f2' values shall not be used for a chassis
dynamometer setting or any emission or range testing. They shall be used
only in the following cases:
(a) determination of downscaling, paragraph 8. of Annex 1;
(b) determination of gearshift points, Annex 2;
(c) interpolation of CO2 and fuel consumption, paragraph 3.2.3 of Annex 7;
(d) calculation of results of electrified vehicles, paragraphs TBD.
 Move that paragraph to 8.2.4.2.:
Once the chassis dynamometer has been set within the specified tolerances,
a vehicle coastdown shall be performed on the chassis dynamometer as
outlined in paragraph 4.3.1.3. The coastdown times shall be recorded.
 Shift following paragraphs by one: 8.2.4.1.  .2 and .2  .3.
 Downscaling, gearshifting and interpolation method need f0, f1, f2 values, which are normally available also from the torque
meter method.
 In the case, that the vehicle cannot be coasted down under any reasonable condition, we need a fallback solution.
 The proposed formula will be a worst case approach for (a) and (b) and is equivalent to "normal" f0f1f2 for (c) and (d).
WLTP Drafting, BMW, 18.08.2015
September 2015 drafting
WLTP GTR DRAFTING ISSUES
ANNEX 4, APPENDIX 1, §2.2. AND 2.3. meeting: Text
TORQUE METER METHOD. BMW #9 incorporated into the GTR
as a proposal.
Paragraphs 2.2. and 2.3. of Appendix 1 of Annex 4:
8.2.3.2.
The simulated road load, Fsj, and the target road load, Fs, shall
be calculated according to the equations below, at each reference speed, vj:
<< formulas from Appendix 1 >>
The simulated road load shall be within a tolerance of ±10 N from the
target road load, in the specified speed ranges, at each reference speed vj.
If the tolerance at any reference speed does not satisfy the criterion of the
method described in this paragraph, paragraph 8.2.3.3. below shall be used
to adjust the chassis dynamometer load setting.
 Move these two formulas to paragraph 8.2.3.2.
 Explain the formulas better (what are the variables). It is intended to compare the simulated road load of the dyno with the
target road load on the basis of a force.
 Having done that, Appendix 1 appears to be not used any more and can be deleted.
WLTP Drafting, BMW, 18.08.2015
Annex 5
Test equipment and calibrations
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37
September 2015 drafting meeting:
No equation necessary. Adopted.
Annex 5, Table A5/1 and §4.2.2.2. Linear
response of an analytical balance
Is the number
of points also
not necessary?
It was agreed to refer to the intercept as a0 and the slope as a1, but is an
equation required in the form of y = mx +b, i.e.
measured mass = a0 + a1 × actual mass
Comment ADAM: In the paragraph above is written that „at least 4 equally-spaced reference weights shall
be tested“. There is also mentioned that linear regression is applied. Therefore, an equation is not
required. These modifications are approved by B. Giechaskiel (JRC).
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38
September 2015 drafting meeting: Remains as "is"
Annex 5, §7.1.1. Laser Diode Spectrometer
(LDS) or Quantum Cascade Laser (QCL)
Comment ADAM: no
14.03.2016
LH – Agreed : the absorption line is chosen
39
September 2015 drafting meeting: remains
open until task force meeting on September 16.
Page 1 of 2
Annex 5, §7.2.1.2. Sampling for N20
Task: Clarification of 7.2.1.2. is required. Possible
interpretation on the next slide.
Comment ADAM: I try to clarify it. For each WLTC-phase one exhaust bag has to be filled -> 4 bags.
For each WLTC-phase one dilution air bag has to be filled -> 4 bags; in total 8 bags
Alternatively, it is sufficient to use the dilution air bag from WLTC_phase1 -> 1 bag; in total 5 bags
14/03/2016
14.03.2016
or one dilution air bag sampled over the whole WLTC -> 1 bag; in total 5 bags
40
September 2015 drafting meeting:
Page 2 of 2
Annex 5, §7.2.1.2. Sampling for N20
Does this mean, that only 5 bags are required? Or, are 9 bags required?
Why is this any different from the number of bags required for all other
compounds?
Possible rewording as Dubuc/Coleman understand the paragraph:
During each phase of the test, a gas sample shall be taken for analysis from the
corresponding diluted exhaust bag.
a gas
sample
shall
from
LH :Additionally,
this is to reduce the
amount
of time
spentbe
fortaken
the GC-MS
and is similar
to that applied for impinger and cartridge. For good practice, I think it
one of the following sources:
should beor
individual phase bags for dilution air or 1 bag taken over the
1. The dilution air bag for each phase,
entire test ? Though in reality, the background N2O should be very stable
2. From the dilution air bag of phase
only, in
orthe atmosphere ?
given its1sources
3. From a single composite dilution air bag
Comment ADAM: see previous slide
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41
September 2015 drafting meeting: adopted.
Unit is m³.
Comment ADAM: the unit
is the same as for Vmix, m3.
Annex 5, §7.1.2.5. NH3 measurement
LH : the maximum lost
amount of exhaust gas is
0.5% of the total exhaust
volume per phase as
calculated from Vmix and
the DF.
The result is in m3/phase
Is the unit in Flow_lost_max m³ or smaller units, such as
litres, which may account for the 0.005 in the equation?
14.03.2016
(this test is still from the
calculations from Moersch
I presume that he used m3 to
be keep same units of the
dilution tunnel. Leave it as it is)
42
September 2015 drafting meeting: Will be rewritten by Cova task force.
Annex 5, §7.3.1.7.1. Sampling for Ethanol
7.3.1.7.1.
A nitrogen or air blank run shall be performed before running the calibration
standard.
The ethanol concentration from the blank analysis must be below the LoD
before the analysis may proceed. A weekly blank run shall provide a check
on contamination of the complete system.
Task: What happens if you are above the LoD?
Also, for how many weeks, i.e. how long?
Comment ADAM: delete the sentence „ The ethanol… proceed“; a weekly blank run is necessary as long
as the Ethanol analysis is carried out.
LH : A blank sampling run should have been taken within one week of the test ?
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14.03.2016
43
September 2015 drafting meeting: Adopted.
Annex 5, §7.3.1.9. Sampling for Ethanol
Task: Propose to change the title to :
Calculations for GC from impingers and from diluted gas.
Agreed?
Comment ADAM/all: agreed
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14.03.2016
44
September 2015 drafting meeting: adopted. Text to be
received from Cova.
Annex 5, §7.3.1.9. Sampling for Ethanol
Comment ADAM:
1. yes
2. I think that should be
deleted from there
3. no
Task:
1. There is no 7.3.1.8. Should 7.3.1.9. become 7.3.1.8.?
2. Can it be confirmed that 7.3.1.9. is a title?
3. If so, can the titles in 7.3.1.10. and 7.3.1.11. be eliminated but the
text "The limits…" and "Interference and…" be retained?
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14.03.2016
45
September 2015 drafting meeting: Clarified. Filter paper must not be defined.
Annex 5, §7.4.1.4.2.1. Analysis for formaldehyde
and acetaldehyde
Task: Should the grade of filter paper be clarified?
Comment ADAM: No. The last sentence can be deleted as is seems to be a copy/paste error. Acrolein is
not a target compound
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14.03.2016
46
Annex 6
Type 1 test procedure and test
conditions
14.03.2016
47
September 2015 drafting meeting:
Add in Annex 1: the tables describe the speed
trace.
"….until the vehicle speed reaches the
respective target speed again."
Annex 6, Test Procedure, §1.2.6.7.4.
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14.03.2016
48
September:
For electric energy, use kWh in Annex 8 and in Annex 6 App. 2.
Conclusion: Annex 8 task force agenda? Niikuni-san to add this to Sept. 11 EV
audio/web.
Drafting Co.: contact UN ECE regarding the use of SI units.
Comment: Should remain flexible even if UN ECE says that joules/MJ should be
used, i.e. use kWh where appropriate.
Page 1 of 2
Annex 6, Appendix 2, Test procedure for
electric power supply system monitoring
EXPERT PROPOSAL: 29.07.2014: Dr. Ligterink (TNO) and his colleague,
Gerrit Kadijk, highlights inconsistencies within the GTR concerning units
used in Annex 6, Appendix 2 (Test procedure for electric power supply
system monitoring). The problem is whether (a) kW.h, joules or megajoules
should be used in equations, and, (b), whether kW.h, joules or megajoiules
should be used in the Willans factors, and (c) whether the equations are all
correct.
This applies also to Annex 7 (Calculations) and to Annex 8 (Evs).
14.03.2016
49
April IWG/drafting meeting (Stockholm): Rob Cuelenaere to investigate.
Page 2 of 2
GTR Text:
• Should energy content of fuel be in, megajoules, Wh or kWh?
Consistency in the use of MJ or other units
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50
September 2015 drafting meeting: H. Schmidt and K. Kolesa confirm
that the text was approved in Pune. GTR amended accordingly.
Annex 6, Appendix 1, Test procedure
periodically regenerating systems, §1. General
OPEN POINT: Was it
agreed that this text is
to be included under
§1. General?
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51
September 2015 drafting meeting: H. Schmidt and K. Kolesa confirm that
the text was approved in Pune. GTR amended accordingly.
Annex 6, Appendix 1, Test procedure
periodically regenerating systems, §2.
OPEN POINT: Was
this text adopted?
14.03.2016
52
September 2015 drafting meeting: contact Nick-san.
Annex 6, Appendix 1, Test procedure
periodically regenerating systems, §3.1.1.
EXPERT PROPOSAL:
This paragraph was
to have been
checked by N.
Ichikawa. Is the
paragraph adopted?
14.03.2016
53
September 2015 drafting
WLTP GTR DRAFTING ISSUES
ANNEX 6, APPENDIX 2, §1. RCB CORRECTION. BMW #12 meeting: follow progress
Current text:
Annex 6, Appendix 2
of Annex 8, App. 2 and
match this appendix
accordingly.
 Is it clear enough, that if the vehicle has more
than one battery:
- all batteries are measured; YES
- the threshold refers to the sum;
- the correction is calculated using the sum of
all Delta-RCBs of all batteries?
 If not, whole Appendix 2 should be checked, as
well as references in Annex 6 test.
 Is the definition of battery / REESS clear? Is
plus/minus energy in/out clear?
WLTP Drafting, BMW, 18.08.2015
September 2015 drafting meeting: not a drafting issue.
WLTP GTR DRAFTING ISSUES Small group to analyse these proposals.
ANNEX 6, APPENDIX 2, §2.1.1. RCB CORRECTION, MEASUREMENT TOLERANCE.
BMW #11
Change text regarding tolerance in:
Example
average current, average current,
lower
higher
peak current
current [A]
5
15
>200
tolerance [A]
0.025
0.075
1.000
0.2
0.2
0.2
to measured value
tolerance [A]
to full scale of 200
 Electric current cannot be measured with that accuracy, because:
- taking an accurate instrument, it will be magnetized and therefore
will have an offset with the first engine start (too high currents);
- taking an instrument for high currents, cannot be that accurate.
 Tolerance on the measured value is not a technical correct tolerance,
only full scale tolerance is valid (while limiting the full scale).
WLTP Drafting, BMW, 18.08.2015
2.1.1. The battery current shall be measured during the tests using
a clamp-on or closed type current transducer. The current
transducer (i.e. a current sensor without data acquisition
equipment) shall have a minimum accuracy of 0.1 per cent of
full scale, and the full scale shall be selected within the maximum
electric load and the maximum load + 50%.
 There are two solutions:
 (1) Exclude current of starting the engine:
- small energy error;
- measurement accuracy can be maintained;
- risk of wrong application (which wire to measure?).
 (2) Increase tolerance;
no error in balanced energy;
slightly lower accuracy;
no risk of wrong application.
 Favourite is option (2), which is reflected in the text.
WLTP DRAFTING, ANNEX 6, APPENDIX 2, 1. GENERAL
BATTERY SOC CORRECTION
Current text:
Annex 6, Appendix 2
September 2015 drafting
meeting: not a drafting
issue. Small group to
analyse these proposals.
 Is it clear enough, that if the vehicle has more than one battery:
- all batteries are measured;
- the threshold refers to the sum;
- the correction is applied to the sum of all Delta-RCBs of all batteries?
 If not, whole Appendix 2 should be checked, as well as references in Annex 6 test.
 NEW: Is the definition of battery / REESS clear? Is plus/minus energy in/out clear?
Page 56
WLTP Drafting TF, BMW, 19.06.2015
September 2015 drafting meeting: Change all to all REESSs. GTR modified
accordingly.
Annex 6, Appendix 2, Test procedure for
electric power supply system monitoring
OPEN POINT: For all vehicle batteries?
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57
September 2015 drafting meeting: not a drafting issue.
Small group to analyse these proposals.
Annex 6, Appendix 2, §2. Measurement
equipment and instrumentation
OPEN POINT: …current(s)…?
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Annex 7
Calculations
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59
September 2015 drafting meeting: OK.
Annex 7, Calculations, §3.2.1.1.1. Correction
of DF for E0
Task: Horiba points out that the numerator for E0 should be
13.5 and not 13.4. T. Adam (Audi) agrees.
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September 2015 drafting meeting: adopted.
Annex 7, Calculations, §3.2.1.1.1.
Calculation of dilution factors
Comment ADAM: Agreement with
R.Gardner, the equation was taken
from R101
Task: approval of the equation requested.
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61
September 2015 drafting meeting: not yet adopted.
Wait until September 16 additional pollutants meeting.
Annex 7, Calculations, §3.2.1.4., 3.2.1.5., 3.2.1.6. and
3.2.1.7. Concentrations of N2O, NH3, ethanol and carbonyl
mass
Task: Approval of paragraphs required.
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62
September 2015 drafting meeting:
Annette: “Are to be” is correct. GTR
amended.
Comment ADAM: I think „shall be“ is correct?
Annex 7, 3.2.3.2.2.3. Aerodynamic drag of
an individual vehicle
Shall be included or that are included? Or, "are to be
included"?
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63
September
WLTP GTR DRAFTING ISSUES
ANNEX 7, §3.2.3.2.4. AND §3.2.3.2.2.3. MINOR EDITORIAL ISSUES. 2015 drafting
meeting: OK.
BMW #13, #14
Delete last "3"to become 3.2.3.2.4.
Task: GTR modified accordingly
(25.08.2015).
Add subscript "ind" to 3.2.3.2.2.3. to the sentence above the
formula.
Comment ADAM: ok
Task: GTR modified accordingly
(25.08.2015).
WLTP Drafting, BMW, 18.08.2015
September 2015 drafting meeting: adopted.
Annex 7, §6.13. Fuel consumption of a
vehicle fueled by hydrogen
Confirmation that d should be
included in the list of variables.
Comment ADAM: ok
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65
Annex 8
Pure electric, hybrid electric and
compressed hydrogen fuel cell
hybrid vehicles
Annex 8 is still in a state of development. There will be at least 3
audio/webs in September to clarify open points and to do drafting.
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66
•
September 2015 drafting meeting: Will be done in conjunction with
post-processing.
Annex 8
• Use of measured and/or recorded.
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67
•
September 2015 drafting meeting: to be discussed in Tokyo; not
highly important.
Miscellaneous
• "In the case that" could be replaced by "if".
• Elimination of all equation numbers
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68
End
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