UN R177 — Supplement 1 to the 01 series of amendments

Vehicles of categories X and Y must be tested in the ADS testing mode of paragraph 2.4.2.7. of Annex B6 to UN Regulation No. 154. Where necessary, the mode must be extended for the TP1 and TP2 tests and for “the determination of the speed of maximum power set out in Annex 5 of this regulation”. If the vehicle is equipped with an ADS testing mode, it must be engaged for “all tests of TP1 or TP2 and determination of speed of maximum power, where an ADS feature is active”. New paragraph 3.4.2. defines “ADS user” as “a human user of an Automated Driving System, as defined in UN Regulation No. [ADS]”. New paragraph 3.4.3. says that “vehicle user” means “in the context of this Regulation a driver or ADS user”. A new footnote says “As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document ECE/TRANS/WP.29/78/Rev.8”.

Paragraph 3.4.1. now defines “User-selectable mode” instead of “Driver-selectable mode”, and speaks of a “vehicle user-selectable condition” instead of a “driver-selectable condition”. Paragraph 3.5.4. now says “user-selectable mode” instead of “driver-selectable mode”. In paragraph 8.8.5., “driver-selectable modes” is now “user-selectable modes”. If the gearbox has user-selectable gears, the gear must be selected as recommended by the manufacturer to achieve maximum power; the words “for a typical driver” are deleted. Gear shifting by special modes or actions that are not available to a typical vehicle user, instead of a typical driver, is not permitted.

Paragraph 3.5.5. now says “maximum acceleration demand” instead of “maximum accelerator pedal command”. Paragraph 3.5.6. now says “maximum acceleration demand command” instead of “maximum accelerator pedal command”. Measurements common to both TP1 and TP2 now include “acceleration demand” instead of “accelerator pedal command”. The maximum acceleration demand must be given “by either the pedal position or by vehicle communication network for a duration of at least 10 s”. The 10-second measurement time window begins “when the acceleration demand has reached maximum as indicated by the acceleration demand measurement, and the gear ratio (if changed) has begun a period in which it is constant for at least 10 seconds”.

For chassis dynamometer force, the accuracy of the force transducer must be “at least ±10 N or ±0.1% of full scale force, whichever is greater, for all measured increments”. Before this supplement, it had to be at least ±10 N for all measured increments. For intake manifold pressure, Table 2 now gives “± 2 % or from onboard intake manifold pressure signal” instead of “± 2 %”. The item “Accelerator pedal command” is now “Acceleration demand”, and its remark is now “As read from onboard acceleration demand signal”.

The test must be stopped immediately “if one or more warning indication(s) with regard to the powertrain are activated”. Before this supplement, it had to be stopped immediately “if warning indicator(s) with regard to the powertrain turns on”. The note now gives “engine malfunction indication” instead of “engine check lamp” as an example of a warning. Paragraph 8.8.3. now has the title “Vehicle conditioning” instead of “Vehicle conditioning / System Bench conditioning”. Its text now speaks of “the vehicle” instead of “the vehicle / system”, and of “initial vehicle conditioning”. In the conditioning settings that the vehicle manufacturer or the Type-Approval Authority may change “as necessary to achieve stable operating metrics”, “driver-selectable mode” is now “user-selectable mode”.

In Appendix 1 to Annex 1, paragraph 7.2.2. now reads “In case of TP1, electrical conversion efficiency of the inverter and electric machine or their combination”. Before this supplement, it spoke of “electrical conversion energy”. Paragraph 7.3. of Appendix 1 now says “User-selectable mode switch: Yes/No” instead of “Driver-selectable mode switch: Yes/No”. In the test report table of Appendix 2, item 3.4. now says “if user-selectable gear available” and item 3.6. now says “Acceleration demand … %”. Before, these items said “if driver selectable gear available” and “Accelerator pedal command … %”.

In Annex 6, paragraph 2.3., Table 1 has a new note 2, which says that “The thermostat can be fixed in the fully open position”. Note 5 to Table 2 now writes out “Exhaust gas recirculation (EGR) system” instead of “EGR system”. The separate footnote “Exhaust gas recirculation.” is deleted.