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Document Title Proposal for Supplement 1 to the 02 series of amendments to Regulation No. 90
Reference Number WP.29/2012/4
Date
30 Dec 2011
Summary This proposal to establish a "bedding in" procedure was adopted at the March 2012 WP.29 session as amended by paragraph 64 of the session report. (Click the meeting link to access the report.)
Rulemaking Area(s) UN R90 Replacement Brake Components
Regulatory Impact
02 series of amendments | Supplement 1
Proposal Status Adopted
Meeting(s)
Downloads
UNECE server .pdf format
Excerpts from session reports related to this document
WP.29 | Session 156 | 13-16 Mar 2012

64. Agenda item 4.7.2, UN Regulation No. 90, document ECE/TRANS/WP.29/2012/4,
Page 11, Annex 11, paragraph 4.2.2.2.2., amend to read:

“4.2.2.2.2. Test programme (brake drum high load test).

Table A11/4.2.2.2.2.











Test provisionHigh load test
“Bedding in” procedure 200 brake applications
Initial speed: 60 km/h
Final speed: 5 km/h
dm alternating between 1 m/s2 and 2 m/s2
Initial temperature: ≤ 200 °C (beginning at room temperature)
Alternatively bedding may be omitted if the applicant for approval does not consider it to be necessary
Type of brakingBraking to less than 5 km/h
Total number of brake applications150
Initial brake drum temperature at each brake application ≤ 100 °C
Brake applications
from
to		 60 km/h
≤ 5 km/h
Brake torque set to produce a deceleration of6 m/s²
Cooling (also deviating from paragraph 3.2.3. of this annex)Permitted
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