The agenda includes presentations on UN GTR 21 covering highly integrated systems, FCEVs, and more efficient test methods; UN GTR 22 addressing MPRs, SOCR, readiness monitor and conditioning cycles, and mutual recognition; and UN GTR 25 with OICA comments and updates on MPRs/Energy throughput, Part C virtual distance verification, Annex 2, alternative test methods, normal usage indices, and battery replacement provisions.

Proposal to amend UN GTR No. 21 on determination of system power of hybrid electric vehicles and pure electric vehicles having more than one electric machine for propulsion. The amendment introduces a consolidated reference point concept for identifying where mechanical power is first produced from stored energy in electrified powertrains. Two test procedures (TP1 measuring electrical power and engine parameters; TP2 measuring torque and speed at axles) are defined to determine comparable vehicle system power ratings. Key modifications include requirements for manufacturers to provide verifiable energy conversion factors (K factors), hybrid power flow descriptions, and identification of applicable reference points. Testing involves repeated maximum power measurements on dynamometers at fixed speeds with specified accuracy requirements for instrumentation.

The document outlines work priorities for UN GTR 21, 22, and 25 amendments. UN R21 Phase 4 will address fuel-cell electric vehicles, measurement alternatives for integrated systems, test method efficiency, and alignment with UN R177. UN R22 Phase 4 will explore conditioning cycles, readiness monitors, certified range performance requirements, and alignment with UN R154-04 and UN R83-09. UN R25 Phase 3 will consider Annex 2 amendments, virtual distance verification, minimum performance requirement thresholds by vehicle category, and alternative test methods.

This document is also available with tracked changes.

This document is also available with tracked changes.

This document is also available with tracked changes.

The Electric Vehicles and the Environment informal group reported on amendments to UN Global Technical Regulations 21, 22, and 25 governing electrified vehicle power, battery durability for light-duty vehicles, and battery durability for heavy-duty vehicles. Proposed changes include revised test methods, boundary conditions, definitions, and alignment with UN Regulation transposition efforts. Future work includes investigating fuel-cell vehicles, charging power curves, and alternative test methods.

This document is also available with tracked changes.

Proposal to amend UN GTR No. 21 on determination of system power of hybrid electric vehicles and pure electric vehicles with more than one electric machine for propulsion. The amendment establishes reference points representing where mechanical power is first produced from energy storage systems, distinguishes between Test Procedure 1 (measuring electrical power and engine power) and Test Procedure 2 (measuring torque and speed at axles or wheel hubs), requires manufacturers to provide verifiable K factors representing conversion efficiencies, mandates five test repetitions with averaging of the last four, specifies measurement accuracies and frequencies, removes dynamometer roller measurement option for TP2 in favor of torque and speed sensors or hub dynamometer, adds system bench testing as alternative with manufacturer approval, and includes applicability guidelines determining which procedure applies to specific powertrain architectures.