Proposal to revise the AEGPL proposal concerning dual fuel systems (GRSG/2015/35). The proposal introduces ISO 26262:2011 (functional safety of electric/electronic systems) as the basis for assessing safety functions. Germany proposes to require resistance against diesel fuel in addition to petrol fuel (Annex 18). Furthermore, the proposal would require manufacturers to provide a full listing of the parts incorporated within the system to ensure that testing services and approval authorities have a clear understanding of any elements that may be safety-related.

27. The expert from AEGPL gave a presentation (GRSG-109-15) justifying the insertion into UN Regulation No. 67 of new provisions to prevent a flow of liquefied petroleum gas (LPG) into the petrol or diesel tank, and vice versa (ECE/TRANS/WP.29/GRSG/2015/35). The expert from Spain raised concerns on the possible interpretation of the new provisions and preferred clear test requirements. The experts from France and Sweden endorsed that position. The expert from Germany introduced GRSG-109-12 proposing some improved text to ECE/TRANS/WP.29/GRSG/2015/35. He raised concerns on the possible leakage of the different fuel types and questioned the need to install redundant valves.

28. Following the discussion, the expert from AEGPL introduced GRSG-109-21 superseding ECE/TRANS/WP.29/GRSG/2015/35. The experts from France and Spain raised a study reservation. Thus, GRSG agreed to resume consideration of this subject at its next session on the basis of a revised proposal by AEGPL, taking into account the comments received.

Presentation on the proposal to allow for limited flows of petrol into the LPG tank of dual fuel vehicles.

27. The expert from AEGPL gave a presentation (GRSG-109-15) justifying the insertion into UN Regulation No. 67 of new provisions to prevent a flow of liquefied petroleum gas (LPG) into the petrol or diesel tank, and vice versa (ECE/TRANS/WP.29/GRSG/2015/35). The expert from Spain raised concerns on the possible interpretation of the new provisions and preferred clear test requirements. The experts from France and Sweden endorsed that position. The expert from Germany introduced GRSG-109-12 proposing some improved text to ECE/TRANS/WP.29/GRSG/2015/35. He raised concerns on the possible leakage of the different fuel types and questioned the need to install redundant valves.

28. Following the discussion, the expert from AEGPL introduced GRSG-109-21 superseding ECE/TRANS/WP.29/GRSG/2015/35. The experts from France and Spain raised a study reservation. Thus, GRSG agreed to resume consideration of this subject at its next session on the basis of a revised proposal by AEGPL, taking into account the comments received.

Proposal to amend UN R67 to allow for limited flows of petrol into the LPG tank of dual fuel vehicles, taking into account comments received during the 109th GRSG session.

27. The expert from AEGPL gave a presentation (GRSG-109-15) justifying the insertion into UN Regulation No. 67 of new provisions to prevent a flow of liquefied petroleum gas (LPG) into the petrol or diesel tank, and vice versa (ECE/TRANS/WP.29/GRSG/2015/35). The expert from Spain raised concerns on the possible interpretation of the new provisions and preferred clear test requirements. The experts from France and Sweden endorsed that position. The expert from Germany introduced GRSG-109-12 proposing some improved text to ECE/TRANS/WP.29/GRSG/2015/35. He raised concerns on the possible leakage of the different fuel types and questioned the need to install redundant valves.

28. Following the discussion, the expert from AEGPL introduced GRSG-109-21 superseding ECE/TRANS/WP.29/GRSG/2015/35. The experts from France and Spain raised a study reservation. Thus, GRSG agreed to resume consideration of this subject at its next session on the basis of a revised proposal by AEGPL, taking into account the comments received.

Proposal to insert new safety provisions with regard to LPG systems having hydraulic interconnections with the petrol or diesel fueling system through which inter-flows of fuels may occur.

25. The expert from AEGPL introduced GRSG-110-13, superseding his proposal ECE/TRANS/WP.29/GRSG/2015/35 and proposing new provisions to prevent a flow of liquefied petroleum gas (LPG) into the petrol or diesel tank, and vice versa. GRSG noted general support on the updated proposal. Following a study reservation by the expert from France, GRSG decided to have a final review of the proposal at its next session in October 2016 and requested the secretariat to circulate GRSG-110-13 with an official symbol.