UN R110: Proposal for a Supplement to the 02 and 03 series of amendments
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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.

Reference Number: GRSG/2018/13
Origin: OICA
Date: 20 July 2018
Proposal Status: Superseded
Related Documents:
GRSG-114-27 | UN R110: Proposal for amendments concerning gas flow adjuster
WP.29/2019/13 | UN R110: Proposal for Supplement 2 to the 03 series of amendments
Working Party on General Safety | Session 115 | 9-12 Oct 2018

38. The expert from OICA presented ECE/TRANS/WP.29/GRSG/2018/13 to adapt the text of the Regulation to the current technology on the gas flow adjustor in the carburettor or injector. GRSG noted a number of comments and proposals for amendments.

39. The expert from OICA introduced GRSG-115-18-Rev.2 amending the Regulation with respect to the inspection requirements for the periodic requalification of CNG cylinders to avoid structural failures during their service life. Finally, GRSG adopted ECE/TRANS/WP.29/GRSG/2018/16, ECE/TRANS/WP.29/GRSG/2018/13 and GRSG-115-18-Rev.2 as reproduced in Annex III to this report. The secretariat was requested to submit the proposals to WP.29 and AC.1 as draft Supplement 2 to the 03 series of amendments to UN Regulation No. 110 for consideration at their March 2019 sessions.