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Worldwide harmonized Motorcycle emission Test Cycle (WMTC)

This document provides a status report on the Worldwide Harmonized Motorcycle Emission Test Cycle (WMTC), including updates on gearshift corrigenda and performance requirements amendment. The report also highlights future considerations and provides links to official documents.

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Worldwide harmonized Motorcycle emission Test Cycle (WMTC)

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  1. Informal document No. GRPE-61-23 (61st GRPE, 11-14 January 2011, agenda item 4) Worldwide harmonized Motorcycle emission Test Cycle(WMTC) Status report WMTC Inf Gr meeting on 13/14 Sept 2010 Technical Report (ECE/TRANS/WP.29/2009/133) Corrigenda related to gearshift (ECE/TRANS/WP.29/GRPE/2011/7) Amendment related to performance requirements (ECE/TRANS/WP.29/GRPE/2011/4)

  2. WMTC Inf Gr meeting on 13/14 Sept 2010 • Hosted by EC in Brussels • Key WMTC Inf Gr members discussed and agreed outline for most appropriate combination of principal and alternative performance requirements with corresponding reference fuel specification • Continued bilateral discussions on gearshift prescriptions • Drafting group prepared 2 draft official documents for review and comment by WMTC Inf Gr prior to submission to GRPE • Identification of durability, evaporative emission, … as items for future consideration (phase 3) Note: Final meeting report circulated to WMTC Inf Gr members

  3. Technical Report (ECE/TRANS/WP.29/2009/133) • Considered by WMTC Inf Gr as still sufficient and appropriate to accompany the proposed sets of performance requirements http://www.unece.org/trans/doc/2009/wp29/ECE-TRANS-WP29-2009-133e.pdf

  4. Corrigenda related to gearshift (ECE/TRANS/WP.29/GRPE/2011/7) • Corrections related to • Upshift speed equation/formula • Rounding of shift speed calculation results • Clarifications of gearshift modification rules (with examples) http://www.unece.org/trans/doc/2011/wp29grpe/ECE-TRANS-WP29-GRPE-2011-07e.pdf

  5. Amendment on performance requirements (ECE/TRANS/WP.29/GRPE/2011/4) • Performance requirements • Japanese limits as principal limits • 3 sets of alternatives limits (Euro 3; Indian and US) • Reference fuel • Existing WMTC reference fuel as default for principal limits with option to use Japanese reference fuel (or other reference fuel with demonstrated equivalence in terms of emissions) • Existing WMTC reference fuel also linked to Indian and Euro 3 alternative limits • US reference fuel linked to US alternative limits http://www.unece.org/trans/doc/2011/wp29grpe/ECE-TRANS-WP29-GRPE-2011-04e.pdf

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