UN R160 Supplement 2 (00 series) · UNECE Regulation No. 160 (ECE R160) — Uniform provisions concerning the approval of motor vehicles with regard to the Event Data Recorder.
UN R160 — Supplement 2 to the 00 series of amendments
Supplement 1 → 2
- What changed
- Annex 4, Table 1 has a new footnote to the “+/- 10%” accuracy of lateral and longitudinal acceleration (post-crash).
- This footnote reads “+/- 10 per cent of the full range of the accelerometer used in the Electronic Control Unit (ECU) containing the EDR function”.
- Another new footnote says that the format for lateral acceleration recorded in rollover is at the option of the manufacturer.
- Why
- The acceleration data accuracy tolerance can be applied in multiple ways, and this can potentially lead to different interpretations by type-approval authorities.
- Lateral acceleration in rollover events is not recorded with the same sensors as for lateral air bag deployments, so the format requirements are not appropriate.
Q1What changed3 changes
New footnotes on acceleration accuracy and rollover format (Annex 4, Table 1)
Annex 4, Table 1 has two new footnotes. One footnote is on the “+/- 10%” accuracy of lateral and longitudinal acceleration (post-crash). It reads “+/- 10 per cent of the full range of the accelerometer used in the Electronic Control Unit (ECU) containing the EDR function”. The other footnote says that the format for lateral acceleration recorded in rollover is at the option of the manufacturer.
Q2Why it changed
- Proposed by
- Expert from the Informal Working Group on Event Data Recorder / Data Storage System for Automated Driving
- Working party
- GRSG, 125th session (March 2023)
Reasons
There are multiple ways to apply the acceleration data accuracy tolerance. This can potentially lead to different interpretations when type-approval authorities apply it. The IWG specified the tolerance as “+/- 10 per cent of the full range of the accelerometer used in the ECU containing the EDR function”.
Sources (3)
“There are multiple ways in which the acceleration data accuracy tolerance can be applied.”
“This can potentially lead to different interpretations when applied by type-approval authorities.”
“To resolve this the IWG specified that the currently specified accuracy tolerance be specified as "+/- 10 per cent of the full range of the accelerometer used in the ECU containing the EDR function".”
Lateral acceleration in rollover events is not recorded with the same sensors as for lateral air bag deployments. For this reason, the format requirements are not appropriate. A footnote now makes clear that the format for lateral acceleration in rollover events is at the option of the manufacturer.
Sources (2)
“Since lateral acceleration in rollover events are not recorded using the same sensors as used for lateral air bag deployments”
“the format requirements are not appropriate and thus a footnote was added to clarify that the format for lateral acceleration in rollover events is at the option of the manufacturer.”
Document trail
- 2023-01ProposalECE/TRANS/WP.29/GRSG/2023/11Proposal by the EDR/DSSAD IWG
- —RevisedGRSG-125-01-Rev.1Changes to the proposal by the expert from OICA
- —Working party adoptsECE/TRANS/WP.29/GRSG/104Session report, para. 30
- 2023-08Sent to WP.29ECE/TRANS/WP.29/2023/101Text that GRSG sent to WP.29 and AC.1
- 2023-11WP.29 adoptsECE/TRANS/WP.29/1175Adopted at the 191st session (session report, para. 180)
- 2024-06-15In forceC.N.272.2024.TREATIES-XI.B.16.160UN depositary notification
Q3Who is affected
Vehicle manufacturer
- Check that lateral and longitudinal acceleration (post-crash), if recorded, is accurate to “+/- 10 per cent of the full range of the accelerometer used in the Electronic Control Unit (ECU) containing the EDR function”.
Component supplier
- No direct action for this role.
Technical service / Approval authority
- Be ready to check lateral and longitudinal acceleration (post-crash), if recorded, against “+/- 10 per cent of the full range of the accelerometer used in the Electronic Control Unit (ECU) containing the EDR function”.
See every change side by side
RegVault customers compare every version of UN regulations, read the consolidated text and download the PDF.
ⓘ This report gives advice only. It is not legal or type-approval advice.