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Stockholm
(Latest 16 October 2014)
1. Welcome and adoption of the agenda

Documents will be distributed on CircaBC, and as soon as they are available. There is a request that there should be a description of the content in the document name.

WLTP-SG-EV-04-01 | Draft agenda for the 7th WLTP E-Lab informal subgroup session
2. CO2 family definition and combined approach

A task force will be started chaired by Matthias. To develop the proposal including validation. Japan will check the proposal internally and report a position. VW will check the possibility to perform simulations. The proposal will be presented at the next WLTP IWG with clear statement of the proposal regarding tolerances and limitations. Including the alternative to not use the combined approach for electrified vehicles and how this affects the test burden and family definition.

WLTP-SG-EV-04-02 | ACEA: Combined approach and family definition for electric vehicles Open issues list items 56 and 2.
WLTP-SG-EV-04-03 | Japan comments on WLTP and Electric Vehicles: CO2 family definition and Combined approach for EVs
3. Determination of system power for hybrid system

For the downscaling method the recommendation is to keep the present text and wait for a method to determine system power.

At the next WLTP IWG we need to address the question to determine system power to be raised to GRPE and further to WP29. In order that such a method which is suitable for WLTP is developed.

WLTP-SG-EV-04-04 | ACEA views on Hybrid System Power definition
4. RCB correction

ACEA presents proposal to correct editorial errors in the current GTR. There is a formula for calculation of fuel consumption that needs to be corrected because the use of different units on different places in the GTR. Japan explains that the unit Wh/km was introduced in phase 1a in order to be used when calculating RCB correction factors for use to calculate phase specific values. ACEA presents two proposals to correct. Option one to correct to the unit Wh and option two to keep the unit as it is Wh/km.

Japan prefers option two. Can accept option one with slight modification of RCB correction. In order that it can be used to calculate phase specific RCB correction factors.

T&E made comments on GTR last year including annex 8. Ichikawa-san will check if these are included in the last version of the GTR. With the assistance of T&E.

ACEA request to see an example that shows that the formula from phase 1a gives the same results as before this change was introduced in the GTR.

Formula for delta E is used three times in the GTR. Two times with unit Mj and one time with Wh. The factor 0.0036 should only be used in the case of Mj.

Should be consistent. The preferred option is to use Mj and explain the factor with a unit. The group agrees on the proposed changes.

Shows an example with real test data with the Japanese proposal. The lines are not parallel. But according to Japan the current GTR includes the possibility for the manufacturer to develop phase specific corrections factor to replace single correction factor. The proposal is that phase specific values is not possible based on this example. Because it results in a deviation of up to 6 gCO2/km with the correction factor.

Japan will discuss these results internally. After that will come back with a position.

Also needs to discuss what accuracy that should be acceptable.

ACEA will perform more simulations to give more information to base the conclusion on.

WLTP-SG-EV-04-05 | WLTP and Electrified Vehicles: Application of the REESS Charge Balance Correction
5. WLTC city cycle

ACEA presents proposal for end of test criteria for PEV. Not only limited to WLTC city test but also to the complete WLTC test.

If the proposal will be accepted and used it should be limited to when the vehicle maximum speed is limited.

For some vehicles the WLTC city could be an alternative. The GTR should be clear when this could be the case.

For cases where there is limited acceleration and the vehicle cannot follow the speed trace the down scale method can be used when a method to determine system power is available. Until then the procedure in the current GTR should be kept.

ACEA will revise the proposal according to the discussion and Japan will consider this internally. This will be done before end of September.

ACEA presents a proposal of a text for the GTR.

WLTP-SG-EV-04-06 | WLTP: PEV Range test procedure-End of test criteria
6. Procedure for FCV

Draft proposal to be presented at WLTP IWG meeting 10.

ACEA is working on a proposal and evaluating existing regulation. Also Japan is working on a proposal. There is a need for collaboration regarding procedure for FCV. Issues to reflect on are for example applicability of down scaling method.

Plan to have a draft proposal beginning of October.

7. Phase-specific CO2 calculation

The first document summaries what parameters that Japan requires regarding phase specific values. Requires FC, range and electric consumption from each phase. Because vehicles are used in different ways buy different customers.

And this will be used for customer information. Because of this the accuracy of the values does not need to be too detailed.

This needs a discussion together with European Commission in order to have a common understanding on what values the GTR should deliver.

The Proposal from Japan requires additional CS test to establish correction factors. If phase specific values are available there is no need for WLTC city test. And there would not be an increased test burden with calculated phase specific values.

This proposal will be discussed internally in ACEA and after that with the European Commission at EU WLTP.

ACEA/Renault did additional simulations of the proposal from Japan. The results regarding CO2 are not the expected. Also regarding ranges. The conclusion is that the proposal from Japan needs further development. The WLTC city cycle should be enough for information.

Japan is of the opinion that maybe no need for UF in calculation of phase specific values. Will reconsider the proposal regarding use of UF. Japan will present new proposal end of September.
Proposal to discuss this issue at EU WLTP tentative for the 9 September to have a common position between EU and Japan that could be presented at

WLTP-SG-EV-04-07 | WLTP: Japanese positions on fuel and energy consumption and emissions compliance
WLTP-SG-EV-04-08 | ACEA: Phase specific consumption calculation for OVC-HEV based on Japanese proposal
8. Utility factor

Information regarding development of UF in EU. There is now agreement of UF for EU. Next step to develop an equation that will reflect this UF. At this point only represented as table values.

Since there is large deviation in each EU MS and now decided on compromise in EU there should be a possibility to harmonize the UF in the GTR.

WLTP-SG-EV-04-09 | Analysis of WLTP European Utility Factor for OVC-HEV
9. Shortening the test procedures for PEV

The issue should be divided in two, calculation of phase specific values and shortening of the test procedure.

Calculation of phase specific values will be needed both in the case of the normal procedure and the shortened procedure.

We agree to focus on calculation of phase specific values now and postpone the discussion of shortened test procedure for later. The shortened test procedure is relevant for vehicle with long ranges. Vehicles that is not readily available today. For the shortened test procedure there is need to validate the impact of the speed in the constant speed phase.

Japan will analyze the data for WLTC consecutive cycles from the tests performed on Nissan Leaf in phase 1a to complement the proposed calculation method.

In principal the group agrees with the procedure for calculation of phase specific values. These values will only be used for customer information. And at the moment phase specific values is only a request from Japan.

Request that industry provide a short summary of the current state regarding test for range the complete procedure.

New presentation from Japan with motivation for MCT (shortened approach) method. No linear correlation between range and cycle energy gives advantage to shortened test procedure regarding the combined approach.

WLTP-SG-EV-04-10 | Japan input towards shortening the WLTP electric vehicles test procedures
10. Any other business

None.