The deadline for the submission of official working documents for this session is 9 October 2017.
Agenda Item 4. (a)
Heavy duty vehicles: Regulations Nos. 49 and 132
Documentation
GRPE/2018/9
Proposal for a new Supplement to the 05 series of amendments to Regulation No. 49
Proposal for a new Supplement to the 05 series of amendments to Regulation No. 49
Proposal to improve the “random check requirement” and define the rounding of test results calculated according to Annex 4A in the 05 series of amendments.
GRPE/2018/10
Proposals for a new Supplement to the 06 series of amendments to Regulation No. 49
Proposals for a new Supplement to the 06 series of amendments to Regulation No. 49
Proposal to improve the Engine Control Unit (ECU) torque signal validation requirement in the 06 series of amendments to R49 with regard to dual-fuel or flex-fuel vehicles. Under the regulation, the ECU torque information can be calibrated only to one fuel’s heat value (usually the basic reference fuel) even though the heat value of the alternative fuel is different. In order to increase the accuracy of the torque values used for calculating the emission results during in-service conformity testing, OICA proposes to change the provisions to either:
Demonstrate that both fuels comply because the ODB system is able to detect the fuel used, or
Determine the torque deviation caused by the alternative fuel heat value compared to the standard fuel and apply this correction factor to calculate a more accurate power signal for the emission calculation.