Review of Japanese research into drive trace index normalization issues for electrified vehicles.

Description of the scope and objectives of the task force created to draft procedures for evaluating the capacity of control systems to maintain compliance with emissions limits throughout the life of a vehicle.

During the 169th session of WP.29 (para. 39 of the session report), the World Forum was informed that, following the entry into force of the new European legislation on provisions on real driving emissions and Worldwide Harmonized Light Vehicle Test Procedure (WLTP) as of September 2017, no new vehicles will be allowed to enter into the European market without fulfilling these new provisions.

WP.29 agreed to introduce transitional provisions in UN Regulations Nos. 83 and 101 to specify that Contracting Parties applying UN Regulations Nos. 83 and 101 which would also apply WLTP as defined in UN GTR No. 15 (such as the EU) would have no obligation to accept type-approvals granted on the basis of test cycles other than WLTP as of September 2017 (para. 41 of the 169th session report). WP.29 requested the secretariat to prepare an official document for the WP.29 March 2017 session, subject to the endorsement of GRPE at its January 2017 session, on supplements to UN Regulations Nos. 83 and 101 introducing such transitional provisions.

Thus, the secretariat has prepared this text to allow for such a derogation from mutual recognition requirements under UN R83 and R101 until such time as GTR 15 has been transposed into UN Regulations under the 1958 Agreement.

Amended Phase 2a Worldwide Light vehicles emissions Test Procedure (WLTP). Versions of the amended GTR highlighting the changes to the original regulation are available in word format and pdf format. The amendments address:

1. If an alternative value is applied for a parameter, such as a higher n_min_drive or an ASM, this parameter value has to be the same within an interpolation family (Paragraph 5.6.1.).
2. The mass in running order used for the calculation of the power to mass ratio is replaced by mass in running order minus 75 kg (paragraph 1. of Annex 1).
3. Idle engine speed n_idle is removed from the power curve measurement requirement (paragraph 2. of Annex 2).
4. The additional safety margin (ASM) value may be decided by manufacturer rather than the prescribed exponential curve (paragraph 3.4. of Annex 4).
5. The number of decimal place of road load coefficients is defined (paragraph 2.4. of Annex 4).
6. Additional restrictions are set to the application of the split run method for coastdown testing (paragraph 4.3.1.3.4. of Annex 4).
7. Specific data rejection criteria are added (paragraph 4.3.1.4.3. of Annex 4).
8. The “delta method” for road load determination is added (paragraph 6.8. of Annex 4 and other paragraphs. See section 4.4.25.for more detail).
9. The roller radius correction factor is modified(paragraph 6.6.3. of Annex 4).
10. The allowable combination of the test vehicle selection and family requirements are further clarified (paragraph 4.2.1.3. of Annex 4 and other paragraphs of Annex 4).
11. Provisions for an additional cooling fan are included(paragraph 1.1.5. and 1.1.6. of Annex 5).
12. The correction of measurement/recording frequency requirements are specified (over several annexes).
13. Calculation of the n/v ratio is defined (paragraph 8. of Annex 7).
14. The stepwise procedure for calculating the final test results of OVC-HEVs is added (paragraph 4.6. of Annex 8).

WLTP informal working group draft amendments to GTR No. 15 as of 11 October.

WLTP informal working group draft amendments to GTR No. 15 as of 11 October. This version shows the changes made.

Japan proposal: Delta vehicle friction method

Presentation on the current status of the drafting group work on the amendment of GTR 15.

Bill Coleman proposal.

Second draft of the proposed request for authorization for review by EVE informal group stakeholders.

Draft formal proposal to WP.29 for discussion within the EVE informal group.