1. LDV Real Driving Emissions: - Assessment criteria and work plan -
21st of October 2013, Brussels
European Commission DG - Joint Research Centre (JRC) - IET - Institute for Energy and Transport

2. Outline Objectives of the discussion Assessment criteria
Analysis to be conducted (discussion)

3. Objectives of the discussion
To review the assessment criteria and to list those who are relevant for the DE Task Force
To discuss and to propose the analysis required to provide the supporting information needed for the assessment criteria, with the aim to develop guidelines for the involved experts
To (possibly) distribute some work within the participating organizations (The major part shall remain with the method ‘owners’ to compile the results for their method and all vehicles)
If necessary, the proposed guidelines will be reviewed and adapted at each task force meeting

4. Assessment criteria (1)
ROBUSTNESS:
Ability to assess RDE performance
Ability to assess RDE performance under specific testing conditions
Ability to evaluate testing conditions (trip)
Data coverage
Robustness against uncertainties of data acquisition and data evaluation
Technological neutrality

5. Assessment criteria (2)
PRACTICABILITY:
PEMS testing effort
Availability and accuracy/reliability of input parameters
Simplicity of calculation steps
Possibility for independent RDE testing
Flexibility to be adapted to future emissions legislation

6. Quality and transparency
Elements:
A common database is used to conduct the analysis
The data within the database contains the elements for excluding the cold start and the DPF regeneration
For the upcoming analysis to be presented:
The version of the methods shall be indicated
The method owners shall maintain the traceability of the versions and list the changes and their potential implications upon the final results
The final results shall be aggregated for the last and best possible version of the method

7. Assessment criteria & Analysis (1)
Ability to assess RDE performance
Ability to assess RDE performance under specific testing conditions
Ability to evaluate testing conditions (trip)
Data coverage
Results required:
(A) Emissions (g/km)
(B) [Weighted and for the U/R/M]
(C) Generic trip characteristics (All methods)
(C) Results from indicators (method specific or not)
(D) Results from indicators (method specific or not)
Expected: The results from the (C) or (D) indicators shall be reflected/indicated on (A) and (B) results.

8. Assessment criteria & Analysis (2)
Robustness against uncertainties of data acquisition and data evaluation
Case studies (analysis not required for all tests/vehicles)
Data uncertainties: Sensitivity studies
Robustness of data evaluation 1: Performance of the DE methods for specific testing situations
Roundtrip clockwise and counterclockwise driving
Aggressive versus soft or normal driving style
Aggressive driving during part of a test
Other?
Robustness of data evaluation 2: Sensitivity of the method DE to their design parameters
TNO Binning: ?
CLEAR: target function?
MAW: Averaging quantity, Curve and CO2 tolerances

9. Assessment criteria & Analysis (3)
Technology neutrality
Description of the principles envisaged to adapt the methods to hybrid powertrains and alternative fuels
(Discussion) Implications in terms of testing (Parameters and quality required)
(Possibly) case studies with results (as for criteria A, B, C, D)