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GRBP-78-10

UN R51: Proposal for a supplement to the 03 series of amendments

Source(s)

OICA

Date

28 Jul 2023

Status

Informal GR review

Subject

UN R51 Vehicle Noise

Meeting(s)

GRBP | Session 78 | 30 Aug-1 Sep 2023

Agenda item 3. UN Regulation No. 51 (Noise of M and N categories of vehicles)

This proposal concerns to amendments to Annex 7. The proposed changes regarding sound enhancement systems are based on the 03 series of amendment up to Supplement 9. In addition, some clarifications concerning power definition and temperature correction have been included based on experiences with the last changes of this regulation.

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Excerpts from session reports

GRBP | Session 78 | 30 Aug-1 Sep 2023

9. GRBP was informed that the Task Force on Quiet Road Transport Vehicles (TF QRTV) had identified the need that UN Regulation No. 51 regulate noise emissions of Battery Electric Vehicles (BEVs) with sound enhancement systems other than the Acoustic Vehicle Alerting System (AVAS) of UN Regulation No. 138. The expert from OICA presented a first draft of amendments to UN Regulation No. 51 to address this issue (GRBP-78-10).

10. GRBP expressed concerns about aftermarket products that create artificial noise of BEVs other than for safety purposes, and generally supported the idea to eliminate a “grey area” between UN Regulations Nos. 51 and 138. GRBP noted that OICA would prepare a revised document for BEVs with AVAS.