India Proposal on part B4 GTR-2 Amendment Criteria for % CO2 variation

Criteria for declared CO2 value Clause No. 2.3.1 of part B4 prescribes the permitted variation between the declared value and the Type approval test results as : “The CO2 value or the value of fuel consumption adopted as the [approval]/[certification] value shall be that declared by the manufacturer if this is not exceeded by more than 4 percent by the value measured by the technical service. The measured value may be lower without any limitations.” Observations by India: This 4% criteria is taken from 4W regulation where typical CO2 value is more than 80g/km. In the case of small 2Wheers (Class 1 & 2) typical CO2 value will be in the range of 30 to 60 g/km. (For details pl. refer test data on slide No.3). Considering the large test variability for these class of vehicles 4% criteria need to be reviewed for the appropriate value. Data collected by India is given in the next slide with the analysis based on which criteria value is proposed.

Proposal For WMTC class 1 and 2, the tolerance limit for CO2 variation shall be 6%. For WMTC class 3, the 4% limit is found to be ok. Accordingly the clause 2.3.1 of part B4 need to be modified as follows: “The CO2 value or the value of fuel consumption adopted as the [approval]/[certification] value shall be that declared by the manufacturer if this is not exceeded by more than 6 percent for class 1&2 and 4 percent for class 3 by the value measured by the technical service. The measured value may be lower without any limitations.”

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