Proposal from the informal working group on Un Regulations Nos. 51 and 59 for further amendments to the draft 03 series of amendments to UN R51 (document GRB/2014/5).

Proposal to clarify certain terms and symbols used in Annex 7 (ASEP) of the regulation.

This proposal would correct the reference to the latest version of ISO 10844 and introduce transitional provisions for shift of the test track from ISO 10844:1994 to ISO 10844:2011.

Memorandum to the Netherlands Ministry of Infrastructure and the Environment in response to its request for research into

• the effect of the present tyre Regulations on the exterior noise levels of tyres
• comparison of the tyre noise levels in the present distribution with the limit values defined in the tyre Regulations
• definition of the levels of “present-day technology and ambitious technology on base of the distribution of levels found in the present tyre population”.

Presentation on the ISO project to provide a basis for the type approval of vehicles using an indoor pass-by test for noise levels.

Proposal to permit a 74dB(A) limit value for the noise of micro-vans and micro-trucks.

Proposal for an informal working group to proceed with the development of a type-approval regulation for electric and hybrid electric vehicles under the 1958 Agreement in parallel to but separately from the effort to develop a global technical regulation on such vehicles.

Comparison ECE R51.03 (as adopted by GRB) versus the draft China regulation GB1495 for M1 vehicle noise and proposal for reconciling apparent differences between them.

Review of vehicle horn regulations across various markets towards assessing the minimum sound level of 87 dB(A) under UN R28.

Review of research program that quantified differences in tire noise levels between the tire population on sale before and after revision of tire regulation in 2009 (Regulation (EC) No 1222/2009).

Report of the Working Party on Noise on its September 2014 session.

This proposal further refines and clarifies the 03 series of amendments to UN R51 from Informal Working Group on UN Regulations Nos. 51 and 59. The 03 series was proposed in document GRB/2014/5 which was amended and then adopted by the Working Party on Noise during its 60th session. The proposal includes special provisional limits for Chinese micro-vehicles which are being reviewed by Japan.

Under the current 04 series of amendments to UN Regulation No. 41, the engine speed should be measured during all tests in Annex 3 and Annex 7 (Additional sound emission provisions – ASEP). However, IMMA has found that there is very little difference between the measured and the calculated engine speed for a manual transmission (MT) vehicle (Annex, figure 1) and no impact on the test result (Annex, figure 2). Therefore, this proposal would introduce a calculated engine speed for MT vehicles and for continuously variable transmission (CVT)/automatic transmission (AT) with locked gear mechanism into UN Regulation No. 41.

Further refinements to the 02 series of amendments prepared by the Informal Working Group on UN Regulations Nos. 51 and 59. This submission proposes to clarify the amended text of document GRB/2014/6 which was approved during the 60th session of the Working Party on Noise and sent to WP.29 for consideration to adopt.

The purpose of this proposal is to update the reference to the latest version of the ISO 10844 and to introduce transitional provisions for the shift of the test track requirements from ISO 10844: 1994 to ISO 10844: 2014.

Correction to the text of the proposed amendment to introduce a calculated engine speed for manual transmission vehicles and for continuously variable transmission (CVT)/automatic transmission (AT) with locked gear mechanism into UN Regulation No. 41.

Correction to the text proposed by the informal working group on the revision of UN Regulations No. 51 and No. 59 to further refine UN R51.

Correction of typographical errors in the original proposal (document GRB/2015/2): “locked” instead of “rocked”.