Working Document WP.29/2018/72

Report on the development of Amendment 4 to GTR 15. Amendment 4 is part of the second phase development of the GTR mandated to:

1. Introduce definitions of response time, delay time and rise time harmonized with those in GTR Nos. 4 and 11
2. Introduce improvements to the gear shifting procedures
3. Ensure consistency in the use of the terms accuracy, precision, resolution, tolerance, repeatability and deviation
4. Address bi-fuel and bi-fuel gas vehicles in accordance with UN R83
5. Clearly define the appropriate positioning of payload mass (25 kg plus the mass of vehicle load)
6. Correct terminology such as “classes of rolling resistance coefficients”
7. Correct minor spelling and/or punctuation mistakes, and restructuring some paragraphs
8. orrect some equations and to make them all consistent with Word’s use of mathematical symbols
9. Exclude all Rechargeable Electric Energy Storage Systems (REESSs) that do not contribute to vehicle propulsion from monitoring
10. etter define the purity of certain gases such as nitrogen and synthetic air
11. Define more specifically the difference in mass of CO2 during charge sustaining between the test with the highest and lowest positive and negative electric energy charge

15. The Chair of the IWG on WLTP introduced ECE/TRANS/WP.29/GRPE/2018/2 proposing the draft Amend. 4. to UN GTR No. 15 as well as the corresponding report ECE/TRANS/WP.29/GRPE/2018/8 on the development of this amendment.

17. GRPE adopted ECE/TRANS/WP.29/GRPE/2018/2 as amended by Addendum 1 to the session report (ECE/TRANS/WP.29/GRPE/76/Add.1) and requested the secretariat to submit it to WP.29 and the Executive Committee of the 1998 Agreement (AC.3) for consideration and vote at their June 2018 sessions as draft Amendment 4 to GTR No. 15. GRPE also adopted the technical report
(ECE/TRANS/WP.29/GRPE/2018/8) and requested the secretariat to submit it to WP.29 and AC.3 for consideration and vote at their June 2018 sessions.