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Report on the development of Amendment 4 to GTR 15. Amendment 4 is part of the second phase development of the GTR mandated to: - Introduce definitions of response time, delay time and rise time harmonized with those in GTR Nos. 4 and 11
- Introduce improvements to the gear shifting procedures
- Ensure consistency in the use of the terms accuracy, precision, resolution, tolerance, repeatability and deviation
- Address bi-fuel and bi-fuel gas vehicles in accordance with UN R83
- Clearly define the appropriate positioning of payload mass (25 kg plus the mass of vehicle load)
- Correct terminology such as “classes of rolling resistance coefficients”
- Correct minor spelling and/or punctuation mistakes, and restructuring some paragraphs
- orrect some equations and to make them all consistent with Word’s use of mathematical symbols
- Exclude all Rechargeable Electric Energy Storage Systems (REESSs) that do not contribute to vehicle propulsion from monitoring
- Better define the purity of certain gases such as nitrogen and synthetic air
- 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
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