UN R42 Supplement 2 (00 series) · UNECE Regulation No. 42 (ECE R42) — Uniform provisions concerning the approval of vehicles with regard to their front and rear protective devices (bumpers, etc.).
UN R42 — Supplement 2 to the 00 series of amendments
Supplement 1 → 2
- What changed
- Paragraph 6.1.5. now says that its requirement does not apply to sensors, cameras, radar devices, etc. being part of driver assist systems.
- These parts may become damaged, disoriented or broken due to an impact carried out according to Annex 3, “as long as the basic braking and steering performance are still intact”.
- Why
- The expert from the Netherlands prepared the text to explain how to deal with advanced driver assist systems that affect braking and steering requirements.
- UN Regulation No. 42 originated long before advanced driver assist systems were introduced.
- The proposer says that paragraph 6.1.5. is fulfilled as long as the basic functionality of braking systems and steering systems is still guaranteed.
Q1What changed1 change
Sensors of driver assist systems after the Annex 3 impact (para. 6.1.5.)
Paragraph 6.1.5. requires that the vehicle's propulsion, suspension (including tyres), steering and braking systems remain in adjustment and operate in a normal manner. A new text says that this requirement does not apply to sensors, cameras, radar devices, etc. being part of driver assist systems. They may become damaged, disoriented or broken due to an impact carried out according to Annex 3, “as long as the basic braking and steering performance are still intact”. Before this supplement, paragraph 6.1.5. did not have this text on driver assist systems.
Q2Why it changed
- Proposed by
- Expert from the Netherlands
- Working party
- GRSP, 66th session (December 2019)
Reasons
UN Regulation No. 42 originated long before advanced driver assist systems were introduced. Paragraph 6.1.5. states that the steering and braking systems must remain in adjustment and must operate in a normal manner.
Sources (2)
“UN Regulation No. 42 originated long before advanced driver assist systems were introduced.”
“The requirement in paragraph 6.1.5. states that the steering and braking systems shall remain in adjustment and shall operate in a normal manner.”
Damage, disorientation and breakage of sensors being part of driver assist systems is covered under the requirements of other UN Regulations. These are Annex 8 to UN Regulation No. 13-H, Annex 18 to UN Regulation No. 13 and Annex 6 to UN Regulation No. 79. These requirements basically make sure that any possible error in the system does not lead to dangerous or unexpected behaviour of the vehicle.
Sources (2)
“Damage, disorientation and breakage of sensors being part of driver assist systems is covered under the requirements of Annex 8 to UN Regulation No. 13-H, Annex 18 to UN Regulation No. 13 and Annex 6 to UN Regulation No. 79”
“which basically makes sure that any possible error in the system shall not lead to dangerous or unexpected behaviour of the vehicle.”
Paragraph 6.1.5. is fulfilled as long as the basic functionality of braking systems and steering systems is still guaranteed. Examples are the Anti-lock Braking System, Electronic Stability Control and the alignment of the wheels. The proposer gives an example of a sensor failure that would result in the assisted parking mode not functioning anymore. Such a failure should therefore be excluded from the requirements under UN Regulation No. 42.
Sources (2)
“Paragraph 6.1.5. is fulfilled as long as the basic functionality of braking systems and steering systems, like Anti-lock Braking System, Electronic Stability Control and, e.g. the alignment of the wheels are still guaranteed.”
“Failure of a sensor that would result in, e.g. the assisted parking mode not functioning anymore, and should therefore be excluded from the requirements under UN Regulation No. 42.”
This subject was discussed in the Type Approval Authority Meeting, held in Utrecht, the Netherlands in June 2018. General consensus was reached among the participants about this justification.
Sources (2)
“This subject has been discussed in the Type Approval Authority Meeting, held in Utrecht, the Netherlands in June 2018.”
“General consensus was reached among the participants about this justification.”
At GRSP, the expert from OICA requested the deletion of the reference to other UN Regulations in the text of the proposal. GRSP adopted the proposal as amended by Annex IV to its report.
Sources (2)
“The expert from OICA requested the deletion of the reference to other UN Regulations in the text of the proposal.”
“GRSP adopted ECE/TRANS/WP.29/GRSP/2019/31 as amended by Annex IV to this report.”
Document trail
- 2019-09ProposalECE/TRANS/WP.29/GRSP/2019/31Proposal by the expert from the Netherlands
- —Working party adoptsECE/TRANS/WP.29/GRSP/66Session report, para. 25: GRSP adopted the proposal as amended by Annex IV
- 2020-04Sent to WP.29ECE/TRANS/WP.29/2020/52Text that GRSP sent to WP.29 and AC.1
- 2020-06WP.29 adoptsAdopted at the 181st session
- 2021-01-03In forceC.N.23.2021.TREATIES-XI.B.16.42UN depositary notification
Q3Who is affected
Vehicle manufacturer
- Make sure the “basic braking and steering performance” are intact if an Annex 3 impact damages, disorients or breaks driver assist “sensors, cameras, radar devices, etc.”
Component supplier
- No direct action for this role.
Technical service / Approval authority
- If an Annex 3 impact damages, disorients or breaks driver assist “sensors, cameras, radar devices, etc.”, check that the “basic braking and steering performance” are intact.
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ⓘ This report gives advice only. It is not legal or type-approval advice.