Proposal to permit the use of the gaseous reference fuels described in UN R83 in order to reduce potential testing complexity.

Proposal to permit the usage of the gaseous reference fuels described in UN Regulation No. 83 in order to reduce potential testing complexity.

38. The expert from OICA informed GRPE that OICA withdrew ECE/TRANS/WP.29/GRPE/2020/8 from consideration by GRPE. A recent better understanding of the issue following informal discussions with various stakeholders showed the proposal needed to be reconsidered.

39. The representative from CITA introduced GRPE-80-11 together with GRPE-80-10 and GRPE-80-12, as all documents were of similar nature (see para. 20).

Proposal to allow an alternative test method (recognized in SAE J1349) to “set the charge air cooler outlet temperature during bench test to temperature which was observed by vehicle test and corrected to the reference temperature specified in paragraph 5.2.1.” of Annex 5.

Proposal to allow an alternative test method to “set the charge air cooler outlet temperature during bench test to temperature which was observed by vehicle test and corrected to the reference temperature specified in paragraph 5.2.1.” of Annex 5. This alternative method is well recognized in SAE J1349.

33. The expert from OICA introduced ECE/TRANS/WP.29/GRPE/2019/11 and GRPE-79-27-Rev.1 that amended the footnote 9 in table 1 of Annex 5 to introduce an alternative for the measurement of power of charge-air-cooled engines. The representative from United Kingdom of Great Britain and Northern Ireland required clarifications on considerations about the test temperature and potential concerns about tests being done at extreme temperatures. Amendments were provided in GRPE-79-27-Rev.1. GRPE supported the new proposal in GRPE-79-27-Rev.1 as reproduced in Annex V of the session report.

34. GRPE endorsed the proposal and requested the secretariat to submit Annex V of the report to WP.29 and the AC.1 for consideration and vote at their November 2019 sessions as draft Supplement 10 to UN Regulation No. 85.

Proposal to reduce testing burdens by introducing an alternative test method to “decrease the charge air cooler outlet temperature by the same amount that the ambient conditions for the vehicle test varied from the standard temperature.” This aligns with SAE J1349, “9.3 Application of Vehicle Transient Data to Net Power Test.”