Japan’s fourth update of the Worldwide Light Vehicle Test Cycle (WLTC) and gear shift tables.

Japan presentation on its analysis of WLTC gear shift points.

Status report of the development of a harmonized drive cycle for the proposed GTR on light vehicle emissions.

Proposals for the further development of the light-duty vehicle test cycle.

Introductory proposals to further discussions on the use of weighting factors for various categories of light-duty vehicles.

Review of best and worst case scenarios for testing vehicles according to weight, tire selection, and aerodynamic component configurations.

Final draft version of the WLTP global technical regulation for review and eventual approval at the Working Party on Pollution and Energy special session set for 14 November 2013.

Request to continue development, through a second phase following adoption of the current draft GTR, of the light vehicle emissions and fuel consumption test cycle in order to improve certain technical aspects in the current cycle.

Request to continue development, through a second phase following adoption of the current draft GTR, of the light vehicle emissions and fuel consumption test cycle in order to improve certain technical aspects in the current cycle.

Proposal for a further “phase 1b” in the development of the GTR on light vehicle emissions. In order to meet Contracting Party objectives, the draft GTR has been submitted for adoption by the Forum in March 2014. Although the current draft offers a complete test cycle, the WLTP experts want to improve the regulation by further addressing a number of technical elements that were set aside due to time and resource constraints.

Plan for the Asian validation program to assess the repeatability of the WLTP test procedure as part of its phase 1b development.

Proposal to refine the selection of reference speeds for the road load curve determination (Open Issues List Item 12: Coast down procedure (Annex 4)).

Study on applicability of driving index (defined in SAE J2951) to WLTP test cycle.

Japanese proposals concern generic formulas for hydrocarbon density coefficients under WLTP.

Initial working items for the phase 2 development of GTR No. 15 going into 2016.

Open issue #28: proposal of text for adoption by the WLTP informal group.

Current status of the effort to develop a fuel-economy measurement method considering the effect of air-conditioner use in Japan.

Comment from Japan for Normalization item “Deviation from target speed”.

Initial working items for the phase 2 development of GTR No. 15 going into 2016.

Presentation of potential areas for the further development of the global regulation on light vehicle emissions, including test procedures regarding low ambient temperatures, high altitude testing, in service conformity, and durability of catalyst, DPF, and SCR systems as well as electrified vehicle batteries and motors.

Questionnaire presented to Contracting Parties to the 1998 Agreement to gather views on areas to be addressed in the next phase in the development of the global test procedures related to light vehicle emissions.

Presentation on Japanese efforts to develop a method for measuring the impact of air-conditioner use on motor vehicle fuel efficiency.

Conformity of production and electric vehicle internal short circuit testing.

Summary of the responses to the questionnaire intended to help prioritize and focus the second phase development of GTR No. 15.

Proposal to facilitate the checking of road load values used in type-approval tests to ensure that they agree with values registered across production vehicles and to avoid the abuse of allowable RLD tolerances.

Results of a survey to identify and prioritize the future development of the light vehicle emissions GTR.

Presentation on results from the use of the WLTP Phase 1a test protocols across various Contracting Parties in Asia.

Proposal from Japan to clarify the specific objectives and intentions behind the list of supplemental test procedures developed for Phase 2 of GTR No. 15.

“Starter presentation” to launch discussions and work on evaporative emissions under Phase 2 of the GTR development.

Proposal to begin work on the second phase development of the light vehicle emissions GTR, covering:

• Remaining items from the original authorization (WP.29/AC.3/26)
• Open issues remaining under Phase 1b
• Durability of internal combustion engine vehicles and electric vehicles
• Evaporative emissions
• Low ambient temperature emissions
• Test procedure for the determination of additional CO2 emissions and fuel consumption from mobile air conditioning systems
• On-board diagnostics requirements
• Development of criteria for ex-post assessing of road load parameters (document WLTP-12-29-rev1e), and
• “Other items” as may arise.

Status report to the WLTP informal group as part of the ongoing validation of the Phase 1a test procedures.

Proposal to begin work on the second phase development of the light vehicle emissions GTR, covering:

• Remaining items from the original authorization (WP.29/AC.3/26)
• Open issues remaining under Phase 1b
• Durability of internal combustion engine vehicles and electric vehicles
• Evaporative emissions
• Low ambient temperature emissions
• Test procedure for the determination of additional CO2 emissions and fuel consumption from mobile air conditioning systems
• On-board diagnostics requirements
• Development of criteria for ex-post assessing of road load parameters (document WLTP-12-29-rev1e), and
• “Other items” as may arise.

Presentation of Japanese research into a normalization method to compensate for tolerances allowed under the proposed hybrid electric vehicle emissions and energy consumption test procedures.

Clarification of n/v ratios (engine rotational speed divided by vehicle speed) and vehicle mass definitions.

Starting note for the OBD Task Force established for the development of OBD requirement compatible with the WLTP test cycles (and potentially as a separate GTR from GTR No. 15) during the Phase 2 work on GTR No. 15.

Starting note for correction factors for the dynamometer roller radius, additional cooling fan, and alternative road load determination process.

Japan proposal: Delta vehicle friction method

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

Abstract from JSAE chassis dynamometer testing working group with particular regard to 4WD chassis dynamometer.

Proposal for next steps.

Japan comments in relation to the EU submission WP.29-174-09.

Propylene and Toluene Response Factors (Annex 5 Para 5.4.3.)
Methane Response Factor (Annex 5 Paragraph 5.4.3.)
Instrument calibration (Annex 5 Paragraph 5.1.)

During discussion in WLTP/DTP, 40 CFR Part 1066 was not finalized yet. Therefore, the values from text in 2011 were used in GTR15. However, the value in CFR were changed to 1.0% from 0.5%. This changes were made to harmonize with other regulations and also because CH-DY manufacturers could not comply with this value.

NO Consistency of Tyre RRC
3g/km Extension from Cal. ? or Test CO₂ value ?
How to develop f₀ and f₂ with fixed f₁ ?
Adjusted f_0,L and/or f_2,L are bigger than f_0,H and/or f_2,H ?
Huge Error when adjusting f_1,L to f_1,H

Proposal with EC and Japan input.

Proposal to correct errors and clarify provisions based on requirements introduced in the Amendment 6 to UN GTR No. 15.

Proposal to correct errors and clarify provisions based on requirements introduced in the Amendment 6 to UN GTR No. 15.