Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:99:p38
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 99 (pt 38/39)
Character Range: 1261774–1264710

of the WHDC gtr are not needed in this annex.
 [27] Stoichiometric Air/Fuel ratios of automotive fuels - SAE J1829, June 1987. John B. Heywood, Internal combustion engine fundamentals, McGraw-Hill, 1988, Chapter 3.4 "Combustion stoichiometry" (pp. 68 to 72).
 [28] Example calibration/validation methods are available at:
www.unece.org/es/trans/main/wp29/wp29wgs/wp29grpe/pmpfcp
 [29] As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3) - ECE/TRANS/WP.29/78/Rev.2, para.2.
 [30] As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document ECE/TRANS/WP.29/78/Rev.6, para. 2. – www.unece.org/transport/standards/transport/vehicle-regulations-wp29/resolutions
  [31] The numbering of this annex is consistent with the numbering of gtr No. 5 on WWH-OBD.  However, some paragraphs of the WWH-OBD gtr are not needed in this annex.
 [32] This definition does not imply that a temperature sensor is necessary to measure the coolant temperature.
  [33] The measured value shall be considered taking into account the relevant precision tolerance of the test-cell system and the increased variability in the test results due to the malfunction.
 [34] An engine may be considered started during the cranking phase.
  [35] A typical use of this information package may be to establish basic emission road-worthiness of the engine system.
  [36] A typical use of this information package may be to establish detailed understanding of the emission road-worthiness of the engine system.
 [37] It is not required to equip the engine for the sole purpose of providing the information data mentioned in Tables 3 and 4 of Annex 5.
 [38] The manufacturer is allowed to use an additional on-board diagnostic display, such as a dashboard mounted video display device, for providing access to OBD information.  Such an additional device is not subject to the requirements of this annex.
 [39] To the value specified in the appropriate section of this annex.
  [40] Examples of circumstances that may influence if and when OTLs are exceeded are the age of the engine system or whether the test is conducted with a new or aged component.
 [41] This paragraph will be extended to other monitors than emission threshold monitors at a later stage.
 [42] c1 is applicable to Stages B and C as shown in Table 1 of Annex 3. c2 is applicable to Stage A as shown in Table 1 of Annex 3.
 [43] As reported in the approval document.
 [44] This value corresponds to a maximum hexadecimal value of 0xFFFF with a resolution of 0x1.
 [45] e.g. vehicle speed / engine speed / calculated load, ambient temperature, elevation, idle operation, or time of operation.
 [46] The manufacturer is allowed to use an additional on-board diagnostic display, such as a dashboard mounted video display device, for providing access to in-use performance data.  Such an additional device is not subject to the requirements of this