UN R79 Supplement 4 (03 series) · UNECE Regulation No. 79 (ECE R79) — Uniform provisions concerning the approval of vehicles with regard to steering equipment.
UN R79 — Supplement 4 to the 03 series of amendments
Supplement 3 → 4
- What changed
- In several Annex 8 tests for ACSF of Category C, another vehicle approaches from the rear to enable the system. This step now applies unless the system is already enabled according to paragraph 5.6.4.8.3.
- Test condition (f) no longer includes the words “or 7.0 seconds if initiated by a second deliberate action”. Test condition (g) on the second deliberate action is deleted.
- Some speed values now read “10 km/h” instead of “10km/h”, and “oneach” now reads “on each”.
- Why
- The proposal aims to clarify that enabling the system as part of the test procedure is only necessary when the system is not yet enabled.
Q1What changed19 changes
Enabling the system in the tests for ACSF of Category C (para. 3.5.)
In several Annex 8 tests for ACSF of Category C, the ACSF of Category C must be activated (standby mode). Another vehicle must approach from the rear to enable the system as specified in paragraph 5.6.4.8.3. This step now applies unless the system is already enabled according to paragraph 5.6.4.8.3. Before this supplement, the text had no such exception.
Test conditions (f) and (g) (para. 3.5.4.1.)
Paragraph 3.5.4.1. repeats the test for each listed condition, which must occur before the lane change manoeuvre has started. Condition (f) is that the lane change manoeuvre has not commenced within 5.0 seconds following the initiation of the lane change procedure. Before this supplement, condition (f) also included the words “or 7.0 seconds if initiated by a second deliberate action”. Condition (g) is deleted. It read: “The second deliberate action for an appropriate system is performed later than 5.0 seconds after the initiation of the lane change procedure.”
Spacing in speed values and words (para. 3.5.)
Some vehicle speed values now read “10 km/h” instead of “10km/h”. “Vsmin - 10km/h” and “Vsmin-10 km/h” now read “Vsmin – 10 km/h”. In paragraph 3.5.2.2.2., “oneach side” now reads “on each side”. The speed values do not change.
Q2Why it changed
- Proposed by
- Expert from the International Motor Vehicle Inspection Committee
- Working party
- GRVA, seventh session (September 2020)
Reasons
The proposal aims to clarify that enabling the system as part of the test procedure is only necessary when the system is not yet enabled.
Source
“The proposal aims to clarify that enabling the system as part of the test procedure is only necessary when the system is not yet enabled.”
Document trail
- —ProposalGRVA-05-50Informal proposal by the experts from CITA, for the 5th GRVA session
- 2020-07RevisedECE/TRANS/WP.29/GRVA/2020/23Proposal based on GRVA-05-50, for the seventh GRVA session
- —Working party adoptsECE/TRANS/WP.29/GRVA/7Session report, para. 41
- 2020-12Sent to WP.29ECE/TRANS/WP.29/2021/14Text that GRVA sent to WP.29 and AC.1
- 2021-03WP.29 adoptsECE/TRANS/WP.29/1157Adopted at the 183rd session (session report, para. 137)
- 2021-09-30In forceC.N.327.2021.TREATIES-XI.B.16.79UN depositary notification
Q3Who is affected
Vehicle manufacturer
- Update your Annex 8 test plans for the exception “unless the system is already enabled according to paragraph 5.6.4.8.3.”
- Update your test plans for the amended test condition (f) and the deleted test condition (g).
Component supplier
- No direct action for this role.
Technical service / Approval authority
- Apply the exception for a system already enabled according to paragraph 5.6.4.8.3. in the Annex 8 tests.
- Remove test condition (g) from your test runs, and use the amended test condition (f).
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More UN R79 change reports
- 05 series — Supplement 1
- 05 series — Base text
- 04 series — Supplement 12
- 04 series — Supplement 11
- 04 series — Supplement 10
- 04 series — Supplement 9
- 04 series — Supplement 8
- 04 series — Supplement 7
- 04 series — Supplement 6
- 04 series — Supplement 5
- 04 series — Supplement 4
- 04 series — Supplement 3
- 04 series — Supplement 2
- 04 series — Supplement 1
- 04 series — Base text
- 03 series — Supplement 17
- 03 series — Supplement 16
- 03 series — Supplement 15
- 03 series — Supplement 14
- 03 series — Supplement 13
- 03 series — Supplement 12
- 03 series — Supplement 11
- 03 series — Supplement 10
- 03 series — Supplement 9
- 03 series — Supplement 8
- 03 series — Supplement 7
- 03 series — Supplement 6
- 03 series — Supplement 5
- 03 series — Supplement 3
- 03 series — Supplement 2
- 03 series — Supplement 1