ENTERPRISE AND INDUSTRY DIRECTORATE-GENERAL
Consumer goods
Automotive industry
Brussels, 24March 2010
ENTR.F1/JR D(2010)
5thmeeting of the European working group for WLTP
Brussels, 23March 2010
DRAFT MINUTES
- European driving data collection and reporting
a)Presentation by Heinz Steven on "Application of the development approach
described in WLTP-DHC-02-05on ACEA’s EU database(uploaded in Circa - see )
The presentation provides information on how the addition of Swiss in-use driving data to the ACEA database impacts on the average values of the main parameters considered (vehicle speed distribution and relative positive acceleration versus average speed) and on the identification of short trips and average duration and percentage of stop phases. These findings are used in the different steps for the development of candidate cycles (defining number and duration of stops and short trips), which are also assessed on their fit with the database.
Discussion:
Questions were raised about the possible impact the addition of in-use driving data from other regions in the world(e.g. India) could have on the results and the development of candidate cycles. It was clarified that the priority is to complete the EU database with the results of the ongoing data collection exercises in Belgium, Sweden and the United Kingdom and the ones performed by JRC in Spain and Poland, and that no significant changes in the findings are expected from this completion. The adding together of the UE database with other data collected outside the EU could result in lower average speeds, but this could be compensated by taking into mileage data, provided these are available.
It was also suggested and agreed to check to what existing cycles (NEDC, US FTP75, Japan JC08) would fit with the results of the database to assess there relevance. Some comments were made with regards to differences to be expected in view of the less dynamic driving behaviour on US motorways compared to the EU data.
b)Presentation by Allesandro Marotta on the work undertaken by JRC (uploaded in Circa - see )
The presentation provides information on the procedure for data submission to JRC, on how in-use driving data collected are screened and filtered to ensure integrity of data and the impact of this screening and filtering on the data remaining available for processing (overall 80% of original data collected). JRC also requested for an early decision on the selection of the two additional countries in which some further data collection will be done.
Discussion:
Questions were raised about the availability of average speed data for the vehicles used in the data collection exercise and whether the data collected could be assigned to the road type categories. JRC confirmed these data are available, but commented that in view of the proposal by Japan (see further below) the road type categorisation may be replaced by a rule based categorisation (using speed and other relevant parameters).
For the further data collection it was in principle decided to carry this out in France (unless existing data would be sufficiently recent (post 2005) for being used in the data processing) and in the United Kingdom (on M1 vehicles to complement the ongoing data collection on N1 vehicles organised by the UK).
c)Presentation by VITO (Flemisch Institute for technical research) on "on-board vehicle monitoring of driving behaviour (uploaded in Circa - see )
The presentation provides information on in-use driving data collection carried out in 2007-2008 on 28 cars, mainly with the purpose to assess the impact of eco-driving. Data collected on 11 of these vehicles representing 40000 km of driving, will be made available to JRC for WLTP-DHC processing. In 2010 another campaign will be run with another 30 cars and data will be made available as well, as far as feasible taking into account that the deadline for submission of EU in-use driving data to WLTP-DHC has been fixed for September 2010.
Discussion:
Participants showed particular interest in the PEMS equipment used by VITO for particle counting and VITO undertook to provide some further information on this.
d)Presentation by Swedenon the in-use driving data collection and difficulties encountered (uploaded in Circa – see )
Sweden presented a number of practical difficulties encountered (road type definition, access to CAN dataand raised some questions on providing the information specified in the agreed reporting format. An update was provided on the planning of the ongoing data collection exercise indicating that despite the delay caused by the difficulties encountered, data would be available before the September 2010 deadline for the submission of EU-data to WLTP-DHC.
e)Review of EU data collection plan
It was agreed that in order to enable JRC to process all EU data collected prior to submitting them to WLTP-DHC in September 2010, submission of collected data should be done at the latest by mid July 2010. All parties were invited to provide the data they are collecting as soon as they become available, to avoid a peak in workload in July 2010. The planning of the ongoing data collection exercises was reviewed, confirming that for most of the data submission could be done within the deadline specified (allowing for some further data to be submitted later on).
e)Consideration of Japanese proposal for in-use data conversion technique
(WLTP-DHC-03-02, available on Circa website @ )
EU-WLTP reviewed this document submitted by Japan for the next WLTP-DHC meeting to be held on 15 April 2010. Although the approach proposed was considered to be academically sound, questions were raised about the necessity of adding an additional layer of complexity by introducing further detailed weighting factors for each of the road types, vehicles and traffic densities and duration of the these situations recorded during the in-use driving data collection.
EU-WLTP agreed that prior to take a line on the proposal by Japan, a sensitivity analysis on the data collected would be needed to assess whether the traffic congestion parameters to be weighted according the Japanese proposals would have any significant impact on the characteristics of the short trips.
Although a re-categorisation of in-use data collected could be supported in principle to avoid the difficulties emerging from a categorisation based on road type (urban, rural or motorways), EU-WLTP considered that it would not be sufficient to do this based on speed only (as proposed by Japan), but that other parameters may need to be taken into account as well.
Mr. Craig Mills undertook to provide this feedback from EU-WLTP to WLTP-DHC at their next meeting in Ann Arbor on 15 April 2010.
- Consideration of issues to be addressed at the 1st meeting of WLTP-DTP
EU-WLTP considered the documents submitted by the US on draft test procedures (see UNECE website @ ) with a view to ascertain whether this could be used as a basis for the development of the new WLTP test procedure.
ACEA reported that industry has not yet finalised the analysis of this complex and comprehensive proposal, but indicated that it is mainly concerned by high degree of flexibility embedded in the concept, which is common practice in the US legal framework but which may not be suitable for the EU legislative framework. It was agreed that this concern should be flagged by DG ENTR to USEPA.
EU-WLTP also drew up a list of specific issues of interest which should be addressed by WLTP-DTP in developing the new WLTP test procedure. (see Annex).
It was agreed to have a phone conference organised immediately after Easter to further co-ordinate the EU-WLTP position for the 1st WLTP-DTP and 3rd WLTP-DHC meetings taking place in Ann Arbor, Michigan from 13 to 15 April 2010.
- Next EU-WLTP meeting
Tentatively fixed for the 25th of May 2010 in Brussels.
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Annex
European feed back to USEPA proposal for WLTP test procedure
Submitted on 15 March 2010
- NO2 measurements (in total NOx)
Probably not covered by USEPA proposal (?).
- More differentiated measurements of HC (e.g. ethanol, methane, aldehyde contents)
Not clear how the USEPA proposal addresses this issue, "subpart I" (missing in the document submitted by USEPA) seems to address the measurement of oxygenated HCs.
- Ultrafine particle measurements (< 30 nm), there is some academic evidence of ultrafine particle production by catalytic diesel particle filters.
The USEPA proposal seems to contain no reference to particle number measurements. Procedure could be developed by EU but should be taken over into WLTP-GTR at least as an option.
- Ammonium measurements (for vehicles equipped with SCR)
The USEPA proposal seems to contain no reference to ammonium measurements.
- Measurements of raw emissions (without diluting) or alternative dilution systems
The USEPA proposal seems to contain some provisions on direct measurement of raw emissions, which have however to be critically revised.
- Issues coming from new vehicle technologies such as electrical or hybrid vehicles, e.g. measurement of battery charge
USEPA seems to suggest the use of the respective CARB procedures, to be revised.
- Determine electrical range of EV and plug-in HEV
Define tasks and their separation between DHC and DTP groups.
- Preconditioning of vehicles, soak (if applicable), idling periods etc.
Define responsibilities of DHC and DTP groups for drafting.
- Reference to standards
USEPA basically refers to ASTM standards, reference should however be to ISO wherever possible
- Due to the existence of 27 type approval authorities, EU needs well-defined measurement processes, with little margin of decision for technical services.
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