Document ID: chunk:federal_register_of_legislation:F2008C00323:reg:11:p13
Version: federal_register_of_legislation:F2008C00323
Segment Type: reg
Provision Reference: reg 11 (pt 13/45)
Character Range: 456277–459858

V durability testing is carried out, or at the request of the manufacturer, a suitably aged and representative vehicle may be used for these OBD demonstration tests.

         3.3.2. The OBD system shall indicate the failure of an emission-related component or system when that failure results in emissions exceeding the threshold limits given below:

          Reference mass    Mass of carbon  Mass of total  Mass of oxides  Mass of
          (RM)              monoxide        hydrocarbons   of nitrogen     particulates (1)
          (kg)              (CO)            (THC)          (NOx)           (PM)
                            L1              L2             L3              L4
                            (g/km)          (g/km)         (g/km)          (g/km)

Category  Class                             Petrol         Diesel          Petrol            Diesel  Petrol  Diesel  Diesel

M(2)      -                 all             3.20           3.20            0.40              0.40    0.60    1.20    0.18

          I                 RM  1305       3.20           3.20            0.40              0.40    0.60    1.20    0.18
N1(3)

II        1305 < RM  1760  5.80            4.00           0.50            0.50              0.70    1.60    0.23

III       1760 < RM         7.30            4.80           0.60            0.60              0.80    1.90    0.28

(1) For compression-ignition engines.

(2) Except vehicles the maximum mass of which exceeds 2,500 kg.

(3) And those category M vehicles which are specified in note (2).

         3.3.3. Monitoring requirements for vehicles equipped with positive-ignition engines.

         In satisfying the requirements of paragraph 3.3.2. the OBD system shall, at a minimum, monitor for:

         3.3.3.1. reduction in the efficiency of the catalytic converter with respect to the emissions of HC only.  Manufacturers may monitor the front catalyst alone or in combination with the next catalyst(s) downstream.  Each monitored catalyst or catalyst combination shall be considered malfunctioning when the emissions exceed the HC threshold given in table in paragraph 3.3.2.;

         3.3.3.2.  the presence of engine misfire in the engine operating region bounded by the following lines:

            (a) a maximum speed of 4,500 min-1 or 1,000 min-1 greater than the highest speed occurring during a Type I test cycle, whichever is the lower;

            (b) the positive torque line (i.e. engine load with the transmission in neutral);

            (c) a line joining the following engine operating points: the positive torque line at 3,000 min-1 and a point on the maximum speed line defined in (a) above with the engine's manifold vacuum at 13.33 kPa lower than that at the positive torque line.

         3.3.3.3. oxygen sensor deterioration;

         3.3.3.4. if active on the selected fuel, other emission control system components or systems, or emission related powertrain components or systems which are connected to a computer, the failure of which may result in tailpipe emissions exceeding the limits given in paragraph 3.3.2;

         3.3.3.5.  unless otherwise monitored, any other emission-related power-train component connected to a computer, including any relevant sensors to enable monitoring functions to be carried out, shall be monitored for circuit continuity;

         3.3.3.6.  the electronic evaporative emission purge control shall, at a minimum, be monitored for circuit continuity.

         3.3.4. Monitoring requirements for vehicles equipped with compression-ignition engines