Status report on the evaluation of road load determination (RLD) using a “wind tunnel plus chassis dynamometer” versus “coast-down” methodologies to enable a wind tunnel plus coast-down method in GTR 15 and on comparison of running resistance measured on a chassis dynamometer by ISO 10521-1 methods (stabilized speeds) and by deceleration (short method).

EC proposal to address misinterpretations among type approval authorities and manufacturers that “extreme range extenders” (e.g. serial hybrid + small gasoline tank volume + range extender only used after battery is exhausted, + …) can be type-approved as pure electric vehicles.

Authorization prepared to enable the amendment of GTR No. 15 and to prolong the mandate of the WLTP informal working group as adopted by the Administrative Committee of the 1998 Agreement at its March 2014 session.

Presentation on the status of work on phase 1b in the development of GTR No. 15 and particularly on the work of the WLTP Electric Vehicles subgroup.

Progress reports from TUG (chassis dynamometer corrections) and TNO (coast down corrections) covering preliminary results (as of 27.03.2014).

Initial material for deliberations on road load curve determination.

WLTP Phase 1b: Generic formula for hydrocarbon density

Real-time tailpipe ammonia measurements from vehicles tested over the new Worldwide harmonized Light-duty vehicle Test Cycle (WLTC)

Definition of wind tunnel for road load determination (Open Issues #10 and #18).

Proposal on a family definition for road load determination.

Discussion paper on the use of the torque meter in the WLTP coast-down methods to measure the running resistance as part of the road load determination. This document summarizes the views of the special ad hoc group formed to consider this issue.

Discussion paper on “open issue 13” (and 11) concerning corrections for wind conditions that impact coast down tests and times for road load determination and ultimately the road load settings of the chassis dynamometer. This document summarizes the views of the special ad hoc group formed to consider this issue.

WLTP drafting committee working document with corrections to the text of GTR No. 15.

Study on applicability of driving index (defined in SAE J2951) to WLTP test cycle.

Supplemental Test for determination of CO2 emissions under representative regional conditions

Heinz Stephen update on efforts to research and resolve open issues.

Proposal to maintain regulatory language to ensure that vehicles cannot be mis-fueled with a fuel (diesel, leaded or unleaded gasoline, etc.) other than that for which the vehicle is designed.

Discussion of utility factors used in weighting emissions and fuel consumption. Utility factors are ratios based upon driver statistics and vehicle ranges recorded by off-vehicle charging (OVC) hybrid electric vehicles (HEV) (i.e., plug-in hybrid electric vehicles) in charge-depleting and charge-sustaining modes.

ACEA proposes to align the GTR text with the HEV definition used in the EC directive 692/2008/EC (Type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6)).

Proposal to refine the selection of reference speeds for the road load curve determination (Open Issues List Item 12: Coast down procedure (Annex 4)).