UN R154 — 02 series of amendments

Table 1B now has a particle number (PN) limit, L6, for Level 1B. The scope for Level 1B now includes particle number. The text no longer says “if PN measurement is required” for PN sampling and measurement. Table 3b gives new assigned deterioration factors with a PN column, and an equation for other limit values. Unless the transitional provisions give an exemption, Contracting Parties must accept previous-version approvals for eight months after the 02 series enters into force.

Calibration of the PNC must now follow ISO 27891:2015. The calibration factor must be between 0.9 and 1.1. New paragraph 4.3.1.3.3.1. gives an equation for the solid particle penetration. The instrument manufacturer must prove this penetration for each PN-system model. The text deletes the requirement for a coincidence correction function of up to 10 per cent. The evaporation tube can now be catalytically active, with a wall temperature of 350 °C (±10 °C).

New paragraph 3.2.37. defines “reference mass”. The “coasting” definition in paragraph 3.2.36. now says that no propulsion energy, recuperation energy or friction braking applies. Paragraph 5.11. now applies to Level 1A only, and paragraph 5.11.1. adds category N2. New paragraph 6.1.10. requires good engineering judgement when the data input to a formula justifiably leads to division by zero. Paragraph 6.3.11. no longer applies to Level 1A only, and the road load family no longer uses n/v ratios. Table 4B for Level 1B no longer includes category N2.

Paragraph 8.2.3.1. now adds the OBFCM device accuracy to the verifications that follow Appendix 1. Appendix 2 evaluates the OBFCM devices with paragraph 3.3.1. and a factor A value of 1.0526. If a fail decision for OBFCM accuracy comes from tests with commercial fuel, the tests must be done again with reference fuel. For the Type 4 CoP test, paragraph 8.3. now allows the Type 4 test of Annex C3 or the tests of Appendix 4. Appendix 2 has new recursive formulae for the test statistic. On manufacturer request and authority approval, the run-in factor for pollutant emissions, fuel efficiency and fuel consumption can apply to other CoP families.

At the request of the manufacturer, a NOVC-HEV can use the Annex B1 downscaling with the maximum rated engine power. This needs approval of the responsible authority, and the electric machine must not affect the maximum vehicle power. Annex B4 now models the aerodynamic drag coefficient as a five-term polynomial, not a four-term polynomial. Annex B6 adds the measurement of the alternator or DC/DC converter current and the recording of OBFCM data. In Annex B7, vehicles with a manual transmission can exclude upward gear shifts, for a maximum of 2 seconds, from the drive trace indices calculation. Annex C5 now tests OVC-HEVs under charge-sustaining conditions, deletes a reference to ISO 14229:2013 and adds SAE J 1979-2.

For OVC-HEVs and NOVC-HEVs, particle number is now analysed for each test phase. For phases where no combustion engine operates, the emission results can be set to zero. Paragraph 3.1.1.6. keeps the analysis of particulate matter for each applicable test cycle and now allows zero results for cycles without combustion engine operation. For OVC-FCHVs, the considered phase j is the applicable WLTP test cycle only. The EAER equation now uses the arithmetic average charge-sustaining CO2 emission from Table A8/5, step No. 6. Appendix 8 now determines reference values of electric energy consumption for CoP, for PEVs and for OVC-HEVs.

The information document in Annex A1 adds an entry for the KCO2 correction factor family. The test report asks which level is requested, Level 1A or Level 1B. Insulation volume and insulation weight now have a tolerance of +/- 10 per cent. In many paragraphs, “CO2 mass emission” becomes “CO2 emission”. Some changes are wording only, for example “power train” becomes “powertrain” and “[Reserved]” becomes “(Reserved)”. Some footnotes have new links to UNECE web pages.