Document Number GRPE-68-12
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Document title Proposal for draft Amendment 3 to Global Technical Regulation No. 4
Date 24 Dec 2013

Amendment proposal to add test procedures for heavy-duty hybrid vehicles to the global technical regulation on eavy-duty road vehicle emissions (WHDC).

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Related documents
GRPE/2014/11 Proposal for draft Amendment 3 to Global Technical Regulation No. 4 (Superseded)
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Excerpts from session reports related to this document
GRPE | Session 68 | 7-10 Jan 2014

31. [The HDH Chair] focused on the draft amendment to UN GTR No. 4 (GRPE-68-12) by providing details on the definitions, the concept of hybrid powertrain family, the approach considered, the content of Annex 8 (hardware in the loop simulation method) and 9 (powertrains method), as well as amendments aligning UN GTR No. 4 with UN GTR No. 11. The endorsement of GRPE was needed on this last point, since this is beyond the original HDH mandate.