UN R83 Supplement 14 (07 series) · UNECE Regulation No. 83 (ECE R83) — Uniform provisions concerning the approval of vehicles with regard to the emission of pollutants according to engine fuel requirements.
UN R83 — Supplement 14 to the 07 series of amendments
Supplement 13 → 14
- What changed
- In Annex 4a, paragraph 5.1. has a new item (b) on simulation of other vehicle configurations with same body shape or same transmission. It applies where a vehicle road load has already been determined according to Appendix 7a. The condition is that the Type Approval Authority approves the simulation methodology proposed by the manufacturer.
- In Annex 6, paragraph 5.2. now recommends measuring the crankcase pressure at the dip-stick hole, if feasible. Before, it had to be measured there with an inclined-tube manometer.
- In Annex 8, paragraph 5.2.11. has a new sentence. At the request of the manufacturer, a four-wheel drive vehicle must be tested in its primary drive mode of operation.
- Why
- The reference to an inclined-tube manometer for crankcase pressure in general is not a technically neutral description. A dip-stick hole might be not available for all engine types.
- Testing a four-wheel vehicle under Type VI conditions should not be limited to a two-wheel drive mode.
- Where an NEDC road load has already been determined, the conversion from such data to the other version is considered to be equivalent.
Q1What changed6 changes
Road load simulation for other vehicle configurations (Annex 4a, para. 5.1.)
New item (b) of paragraph 5.1. applies where a vehicle road load has already been determined according to Appendix 7a to this annex. In this case, simulation of the other configurations of the vehicle which have same body shape or same transmission may be used, with one condition. The condition is that the Type Approval Authority approves the simulation methodology proposed by the manufacturer. A new sentence says that, as an alternative to this, the following measures may be used. The alternative with the WLTP procedures as defined in UN GTR No. 15 now has the label “(a)”.
Crankcase pressure measurement (Annex 6, para. 5.2.)
The pressure in the crankcase must be measured at an appropriate location. This first sentence of paragraph 5.2. does not change. Before, the second sentence said that it must be measured at the dip-stick hole with an inclined-tube manometer. Now the second sentence says: “It is recommended to measure the pressure at the dip-stick hole, if feasible.” The text no longer refers to an inclined-tube manometer.
Four-wheel drive vehicles in the test (Annex 8, para. 5.2.11.)
Paragraph 5.2.11. has a new last sentence. At the request of the manufacturer, a four-wheel drive vehicle must be tested in its primary drive mode of operation. The first sentence does not change: a four-wheel drive vehicle must be tested in a two-wheel drive mode of operation.
Q2Why it changed
- Proposed by
- Expert from the International Organization of Motor Vehicle Manufacturers (OICA)
- Working party
- GRPE, 83rd session (June 2021)
Reasons
The reference to an inclined-tube manometer for the determination of crankcase pressure in general is not a technically neutral description. For this reason, the proposal deletes this reference. A dip-stick hole might be not available for all engine types.
Sources (2)
“The reference to an inclined-tube manometer for the determination of crankcase pressure in general is not a technically neutral description.”
“Thus, proposal is to delete this reference. Dip-stick hole might be not available for all engine types.”
Testing a four-wheel vehicle under Type VI conditions should not be limited to a two-wheel drive mode. A two-wheel drive mode is also not required under Type I conditions, and a two-wheel mode may not be available.
Source
“Testing a four-wheel vehicle under Type VI conditions should not be limited to a two-wheel drive mode as it also not required under Type I conditions and a two-wheel mode may not be available.”
During the 80th session of GRPE, the alternative methodology converting WLTP road load to NEDC was adopted. Where an NEDC road load has already been determined, the conversion from such data to the other version is considered to be equivalent.
Sources (2)
“During the 80th session of GRPE, the alternative methodology converting WLTP road load to NEDC was adopted.”
“In the case where NEDC road load has been already determined, the conversion from such data to the other version considered to be equivalent.”
Document trail
- 2021-03ProposalECE/TRANS/WP.29/GRPE/2021/10Proposal by the expert from OICA
- —Amended in sessionGRPE-83-15Proposal to amend GRPE/2021/10, by the expert from OICA
- —Working party adoptsECE/TRANS/WP.29/GRPE/83Session report, para. 8 and Annex VI
- 2021-09Sent to WP.29ECE/TRANS/WP.29/2021/133Text that GRPE sent to WP.29 and AC.1
- 2021-11WP.29 adoptsECE/TRANS/WP.29/1161Adopted at the 185th session (session report, para. 121)
- 2022-06-22In forceC.N.221.2022.TREATIES-XI.B.16.83UN depositary notification
Q3Who is affected
Vehicle manufacturer
- For road load simulation under Annex 4a, item (b), use it only if the Type Approval Authority approves your methodology.
- Check your crankcase pressure method against paragraph 5.2.: the dip-stick hole is now recommended, if feasible.
- Decide if you request that a four-wheel drive vehicle is tested in its primary drive mode of operation (paragraph 5.2.11.).
Component supplier
- No direct action for this role.
Technical service / Approval authority
- For road load simulation under Annex 4a, item (b), check that the Type Approval Authority has approved the simulation methodology.
- Check your crankcase pressure test steps: paragraph 5.2. no longer requires an inclined-tube manometer.
- At the request of the manufacturer, test a four-wheel drive vehicle in its primary drive mode of operation (paragraph 5.2.11.).
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ⓘ This report gives advice only. It is not legal or type-approval advice.
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- 09 series — Base text
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