Document ID: chunk:federal_register_of_legislation:F2024L00447:reg:0:p9
Version: federal_register_of_legislation:F2024L00447
Segment Type: reg
Provision Reference: reg 0 (pt 9/57)
Character Range: 116181–119861

paragraph 7. of Annex 5.

Ambient humidity                            %                 Sensor

Ambient temperature                         K                 Sensor

Ambient pressure                            kPa               Sensor

Vehicle speed                               km/h              Sensor, GNSS, or ECU[9]

Vehicle latitude                            Degree            GNSS

Vehicle longitude                           Degree            GNSS

Vehicle altitude[10],[11]                   m                 GNSS or Sensor

Exhaust gas temperature7                    K                 Sensor

Engine coolant temperature7                 K                 Sensor or ECU

Engine speed7                               RPM               Sensor or ECU

Engine torque7                              Nm                Sensor or ECU

Torque at driven axle7 (if applicable)      Nm                Rim torque meter

Pedal position7                             %                 Sensor or ECU

Engine fuel flow[12] (if applicable)        g/s               Sensor or ECU

Engine intake air flow9 (if applicable)     g/s               Sensor or ECU

Fault status7                               —                 ECU

Intake air flow temperature                 K                 Sensor or ECU

Regeneration status7 (if applicable)        —                 ECU

Engine oil temperature7                     K                 Sensor or ECU

Actual gear7                                #                 ECU

Desired gear (e.g. gear shift indicator) 7  #                 ECU

Other vehicle data7                         unspecified       ECU

3.4. Installation of PEMS
              3.4.1. General:

              The installation of the PEMS shall follow the instructions of the PEMS manufacturer and the local health and safety regulations. When the PEMS is installed inside the vehicle, the vehicle should be equipped with gas monitors or warning systems for hazardous gases (e.g. CO). The PEMS should be installed as to minimise electromagnetic interferences during the test as well as exposure to shocks, vibration, dust and variability in temperature. The installation and operation of the PEMS shall be such that it avoids leakage and minimise heat loss. The installation and operation of PEMS shall not change the nature of the exhaust gas nor unduly increase the length of the tailpipe. To avoid the generation of particles, connectors shall be thermally stable at the exhaust gas temperatures expected during the test. It is recommended to avoid the use elastomer connectors to connect the vehicle exhaust outlet and the connecting tube. Elastomer connectors, if used, shall have no contact with the exhaust gas to avoid artefacts. If the test performed with the use of elastomer connectors fails, the test shall be repeated without the use of elastomer connectors.

              3.4.2. Permissible backpressure

              The installation and operation of the PEMS sampling probes shall not unduly increase the pressure at the exhaust outlet in a way that may influence the representativeness of the measurements. It is thus recommended that only one sampling probe is installed in the same plane. If technically feasible, any extension to facilitate the sampling or connection with the exhaust mass flow meter shall have an equivalent, or larger, cross sectional area than the exhaust pipe.

              3.4.3. Exhaust mass flow meter

              Whenever used, the exhaust mass flow meter shall be attached to the vehicle's tailpipe(s) in accordance with the recommendations of the EFM manufacturer. The measurement range of the EFM shall match the range of the