Worldwide Harmonized Light Vehicles Emissions Test Procedure | Session 5 | 8 Jan 2014
Geneva
Agenda Item 5.
Overview of key issues of WLTP Phase 1B

Electrified vehicles: Utility Factors, phase specific calc. formula and shortened test procedure were presented (Working Paper WLTP-05-06) by SG Co-Chair Niikuni. EU Com explained status of work on regional Utility Factor based on WLTP database. Chair raised question about overlapping actions within EU and UN/ECE projects. EU will fix proposal for utility factors in 1. Quarter of 2014 and introduce it for discussion in WLTP Phase 1B. EU Com remarked different definitions of HEV in WLTP and HD regulation and asked for review. Issue will be added to the WLTP OIL.

Cycle/Process and RLD: Responsibility for open issue “sailing” was changed to ACEA. ACEA will develop a proposal. Number of tests (Working Paper WLTP-05-07) and key issues for RLD (WLTP-05-05) were presented by Ichikawa, Kolesa, TSs. ACEA data as well as the correlation program of EC will provide additional for default road load parameters.

General: Presentations on Normalization procedures (Steininger, EC) and on Ambient Temperature Correction Test (ATCT) (Eder, BMW). EC recommended special meeting of RLD experts to discuss normalization approach in 1st Quarter 2014. ACEA will provide first validation data on the family characteristics until end of January.

Chair encouraged Contracting Parties and other stakeholders to show their interest to participate in the validation program for the ATCT procedure.

Chair requested Contracting Parties to give a feedback on the proposed normalization procedures and the interest to (partly) harmonize such procedures in the gtr. Feedback of CPs to WLTP Chair is requested until 14.2.2014.

Documentation
WLTP-05-05 WLTP Phase 1B: Main Open Issues-Road and Dyno Load
WLTP-05-06 WLTP-E-Lab Sub Group Key issues
WLTP-05-07 WLTP Phase 1b open issues: Number of tests
WLTP-05-14 Ambient Temperature Correction Test (ATCT) for WLTP (Audi and BMW)