Document ID: chunk:federal_register_of_legislation:F2024L00446:front:0:p39
Version: federal_register_of_legislation:F2024L00446
Segment Type: other
Provision Reference: 
Character Range: 125396–129804

their design, are expected to have similar exhaust emission and OBD system characteristics. Each engine of this family shall comply with the requirements of this Regulation.
The OBD family may be defined by basic design parameters which shall be common to vehicles within the family. In some cases there may be interaction of parameters. These effects shall also be taken into consideration to ensure that only vehicles with similar exhaust emission characteristics are included within an OBD family.
6.8.1.2. To this end, those vehicles whose parameters described below are identical may be considered to belong to the same OBD family.
Engine:
(a) Combustion process (i.e. positive ignition, compression-ignition, two-stroke, four-stroke/rotary);
(b) Method of engine fuelling (i.e. single or multi-point fuel injection); and
(c) Fuel type (i.e. petrol, diesel, flex fuel petrol/ethanol, flex fuel diesel/  biodiesel, NG/biomethane, LPG, bi fuel petrol/NG/biomethane, bi-              fuel petrol/LPG).
Emission control system:
(a) Type of catalytic converter (i.e. oxidation, three-way, heated catalyst, SCR, other);
(b) Type of particulate trap;
(c) Secondary air injection (i.e. with or without); and
(d) Exhaust gas recirculation (i.e. with or without);
OBD parts and functioning:
The methods of OBD functional monitoring malfunction detection and malfunction indication to the vehicle driver.
6.8.2. OBD thresholds
The OBD thresholds referred to in Annex C5 are specified in Table 4A and Table 4B.
    Table 4A
    This table is only applicable for Level 1A
    OBD thresholds

            Reference mass    Mass of carbon monoxide  Mass of non-methane hydrocarbons  Mass of oxides of nitrogen  Mass of particulate matter1
              (RM)
              (kg)
  (CO)        (NMHC)            (NOx)                    (PM)
  (mg/km)     (mg/km)           (mg/km)                  (mg/km)
  Category    Class                                      PI                                CI                          PI                           CI     PI     CI     CI    PI
  M           —                 All                      1,900                             1,750                       170                          290    90     140    12    12
  N1          I               RM ≤ 1305                  1,900                             1,750                       170                          290    90     140    12    12
  II        1305 < RM ≤ 1760    3,400                    2,200                             225                         320                          110    180    12     12
  III       1760 < RM           4,300                    2,500                             270                         350                          120    220    12     12
  N2          —                 All                      4,300                             2,500                       270                          350    120    220    12    12

    PI Positive Ignition
  CI Compression Ignition.
           1 Positive ignition particulate mass OBD thresholds apply only to vehicles with direct injection engines

    Table 4B
    This table is only applicable for Level 1B
    OBD thresholds

            Reference mass       Mass of carbon monoxide  Mass of non-methane hydrocarbons  Mass of oxides of nitrogen  Mass of particulate matter1
              (RM)
              (kg)
  (CO)        (NMHC)               (NOx)                    (PM)
  (mg/km)     (mg/km)              (mg/km)                  (mg/km)
  Category    Class                                         G                                 D                           G                            D      G      D    G    D
  M           —                    All                      4,060                             —                           320                          —      300    —    —    —
  N1          —*1                GVW≤ 1,700                 4,060                             —                           320                          —      300    —    —    —
  —         1,700 < GVW ≤ 3,500    8,960                    —                                 460                         —                            410    —      —    —
  —*2         All                  14,120                   —                                 320                         —                            300    —      —    —

         G