GAR | GRPE/2018/10

Document Number GRPE/2018/10

1	2	3	4	6
Document title	Proposals for a new Supplement to the 06 series of amendments to Regulation No. 49
Date	20 Oct 2017			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.
Source(s)	OICA
Status	Superseded
Rulemaking area(s)	UN R49 Diesel/CNG/LNG Engine Emissions
Meeting(s)	GRPE \| Session 76 \| 9-12 Jan 2018 Agenda item 4. (a) Heavy duty vehicles: Regulations Nos. 49 and 132
Related documents
Related documents	WP.29/2018/47		UN R49: Proposal for Supplement 6 to the 06 series of amendments (Adopted)
Downloads:		.pdf format	.docx format
Excerpts from session reports related to this document
GRPE \| Session 76 \| 9-12 Jan 2018			23. The expert from OICA also presented ECE/TRANS/WP.29/GRPE/2018/10 with requirements on Engine Control Unit torque signal validation, random check and rounding of test results. The expert from EC proposed clarifications (GRPE-76-16). GRPE adopted the proposal as amended and reproduced in Annex VI and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2018 sessions as draft Supplement 6 to the 06 of amendments to UN Regulation No. 49.