Proposal to allow for the use of use special denominator conditions for certain components or systems. The current definitions of the specific denominators are based on engine/aftertreatment system combinations designed as one TWC for gasoline vehicles and DOC, DPF and SCR respectively NSC for diesel engines. Upcoming emission requirements will bring up additional aftertreatment components like Gasoline Particulate Filters (GPF) or new designs with more than one SCR catalyst. Such new systems or catalyst combinations might require specific conditions to enable the monitoring, especially when their purpose is designed for such conditions.

Proposal to amend current definitions to allow fault code erasing in cold regions (< -7°C) and high altitude (> 2440m), harmonizing the definitions with those used in China and the United States.

Request to extend mandate WLTP Informal Working Group and for guidance on future work plan.

Proposal to clarify “permanent default” and “limp-home mode” in UN R83.

Document prepared by the GRPE chair and secretariat to propose areas for short, medium, and long-term attention.

Consolidated document to inform and update the GRPE on phase 1 of the OBD2 program.

Proposal to allow an alternative test method to “set the charge air cooler outlet temperature during bench test to temperature which was observed by vehicle test and corrected to the reference temperature specified in paragraph 5.2.1.” of Annex 5. This alternative method is well recognized in SAE J1349.

This document is also available with tracked changes: pdf format and word format.

Proposal to further harmonize test procedures for two-wheeled vehicles equipped with conventional combustion engine technology, including restructuring to dedicate separate sections to test types I (tailpipe emission after cold start), II (idle / free acceleration emissions) and VII (energy efficiency). The amendment aligns the GTR with technological progress, including changes related to

1. reference fuels
2. temperature conversion
3. forced induction systems (turbo/super-chargers)
4. treatment of open/closed systems
5. test room humidity
6. CO₂ tolerance, and
7. reference mass of the vehicle.

Proposal to complete the clarification of the basis of the petrol tank capacity restriction for mono fuel gas vehicles and address some administrative issues that have been highlighted during the transposition of WLTP.

Proposal for a new 00 series of amendments to a new UN Regulation on uniform provisions concerning the approval of light duty passenger and commercial vehicles with regards to criteria emissions, emissions of carbon dioxide and fuel consumption and/or the measurement of electric energy consumption and electric range (WLTP). The 00 series of amendments contains two levels against which approvals can be granted; Level 1A which relates to vehicles tested using a 4-phase WLTC; and Level 1B for vehicles tested on a 3-phase WLTC.

Proposal for a new 01 series of amendments to a new UN Regulation on uniform provisions concerning the approval of light duty passenger and commercial vehicles with regards to criteria emissions, emissions of carbon dioxide and fuel consumption and/or the measurement of electric energy consumption and electric range (WLTP)