Proposal to introduce requirements for CNG compressor and CNG accumulator components designed to maintain stable pressure in fuel systems. See also documents GRSG-113-24 and 25 from the previous GRSG session.

Italy research on type CNG4 cylinders in support of the proposal to require that covers be removed in cases where ogive protective covers are fitted to a cylinder before conducting the impact damage (drop) test (document GRSG/2017/29).

Proposal to allow the use of a generator fueled by the vehicle gaseous fuel system that provides electricity to run accessories (e.g., overnight power in sleeper cabs, to maintain battery charge during high electrical power use with loading or lifting equipment). This proposal would allow for the use of LNG/CNG from vehicle fuel tanks and thereby reduce the potential need to vent gas into the air in response to pressure buildup due to warming over time by using the gas to power other devices and equipment.

The target of the meeting was to define essential periodic inspection requirements to be respected when installing gaseous fuel components into a vehicle, and to clarify the material requirements for components inside the LPG tank. The work addressed UN R67 and UN R110. No further meetings are planned at this time.

Proposal to allow for the removal of non-structural parts and accessories in fulfilling the accessibility/inspection provisions of UN R110.

Proposal to delete the reference to visual inspection under the support straps of the cylinders from the text under consideration. Such inspection would require dismantling of the cylinder installations which would contravene the consensus decision to avoid such exhaustive dismantling.

Proposal to amend and clarify the need for a gas flow adjuster under UN R110 with regard to the use of carburetors and fuel injectors. A gas flow adjuster is not necessary when an electronic fuel injection system manages the air/fuel mixture and therefore should be removed from paragraph 18.3.1. An adjuster is needed when air/fuel mixture runs via a carburetor and therefore should be added to paragraph 18.3.2.