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WLTP Phase 2 Roadmap Development and Initial Working Items

This document outlines the preliminary steps for the ongoing work on Phase 2 of the Worldwide Harmonized Light Vehicle Test Procedure (WLTP). Key aspects include defining emission limits, reference fuel specifications, and test procedures, as well as addressing issues such as low ambient temperature, high altitude tests, durability, and in-service conformity. The document also covers the establishment of a detailed roadmap, selection of working items, and organization structure for the upcoming phase.

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WLTP Phase 2 Roadmap Development and Initial Working Items

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  1. Submitted by the expert of Japan Informal document GRPE-70-26 70th GRPE, 13 – 16 January 2015 Agenda item 3(b) Starting note for WLTP phase 2 working items WLTP-08-41e Kazuki KOBAYASHI Vice chair of WLTP

  2. WLTP previous schedule Phase II (2014 ~ 2018) Phase III (2019 ~ 2021) Phase I (2009 ~ 2013) DHC (Development of Harmonized Cycle) Low ambient temperature / High Altitude test procedure Definition of Emission Limits Reference Fuel Specifications DTP (Development of Test Procedure) Correlation with existing regional cycles Durability OCE Off-Cycle Requirement In Service Conformity MAC (Mobile Air Conditioning) Phase Ⅰb 2

  3. WLTP Phase 1b Rough Schedule 2014 2015 2016 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 Phase2 ToR WP.29 GRPE WLTP 167 168 169 68 69 70 71 72 73 gtr formal document gtr informal document Slight modification 14 13 12 5 6 7 8 9 11 10 Phase2 Round Robin

  4. Rough Schedule for preparation for phase2 2014 2015 2016 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 Phase2 ToR WP.29 GRPE WLTP 167 168 169 68 69 70 71 72 73 gtr formal document gtr informal document Slight modification 14 13 12 5 6 7 8 9 11 10 Phase2 Kick off phase2 preparation Develop detailed roadmap and nominate IWG leaders Decide working items and organization Terms of reference

  5. Possible Phase 2 working items • Low ambient temperature • High altitude test • In service conformity • Durability Catalyst,DPF,SCR system Electrified vehicle(battery,motor) • (phase1b issues which need more time for its completion) Refer to attached Excel file First step; gather CP’s needs and requirements. EU commission already provided their proposal regarding EV.

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