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

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)).

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.

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.

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

Supplemental Test for determination of CO2 emissions under representative regional conditions

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

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

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.

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.

Text prepared by the GRPE working group on HDH to add the test procedure on heavy duty hybrids. The text has been prepared as a consolidated version of the GTR.

Working draft of Annex 9 (Test procedure using the HILS method) and Annex 10 (test procedure using the powertrains method) of the amendment to GTR No. 4 (heavy-duty vehicle emissions and fuel consumption) to introduce provisions for heavy-duty hybrid vehicles, prepared by the drafting subgroup of the HDH informal working group.

HDH drafting group working draft of the consolidated revision of GTR No. 4 to include provisions for heavy-duty hybrid vehicles.