53. The Chair of the informal group on GFV reported on the work progress made by the group, also including the Liquefied Natural Gas Task Force (LNG TF) (GRPE-63-20). In particular, he explained that the GFV group discussed revisions to UN Regulations No. 83 and 115 and worked on proposals for amendments (GRPE-63-05-Rev.1 and GRPE-63-06-Rev.1).

54. The Chair of the informal group on Gaseous-Fuelled Vehicles (GFV) presented a proposal for an amendment to UN Regulation No. 83 (GRPE-63-05-Rev.1) redefining the class of bi-fuel vehicles regarding the simultaneous use of gas and petrol in gas mode under certain conditions (primarily when bi-fuel vehicles equipped with gasoline direct injection systems require the injection of a certain amount of gasoline also in gas-powered mode). The expert from Poland preferred to limit the scope of this amendment only to vehicles with direct injection engines. He added that the method based on the gas/energy ratio needs to be corrected for Compressed Natural Gas (CNG) vehicles. The expert from Italy supported this proposal.

55. GRPE agreed to reconsider the proposal in June 2012 on the basis of an official document to be provided to the secretariat by GFV and the expert from Poland.

56. The Chair of the GFV Task Force on Heavy Duty Dual Fuel vehicles (HDDF TF) reported on the status of the task force and the progress made since the last GRPE session (GRPE-63-23). He mentioned the HDDF TF intention to develop amendments to UN Regulation No. 49 (06 series of amendments). In this respect, he presented GRPE-63-21 in detail, proposing a supplement to the 06 series of amendments to UN Regulation No. 49 aimed at enabling the type approval of new Euro VI heavy duty dual-fuel engines and vehicles.

57. GRPE agreed that an updated version of GRPE-63-21 should be distributed as an official document taking into account the result of the discussion at the forthcoming GFV meeting. He invited all experts to send comments on the topic to the Chair of the GFV Task Force on Heavy Duty Dual Fuel vehicles. GRPE also agreed that the group should meet in conjunction with its next session, in June 2012.