Document ID: chunk:federal_register_of_legislation:F2011C00805:reg:11:p10
Version: federal_register_of_legislation:F2011C00805
Segment Type: reg
Provision Reference: reg 11 (pt 10/45)
Character Range: 445164–448267

3.3.2. or that percentage that could lead to an exhaust catalyst, or catalysts, overheating causing irreversible damage.

         2.9.  "Type I test" means the driving cycle (Parts One and Two) used for emission approvals, as detailed in Annex 4, Appendix 1.

         2.10.  A "driving cycle" consists of engine start-up, driving mode where a malfunction would be detected if present, and engine shut-off.

         2.11.  A "warm-up cycle" means sufficient vehicle operation such that the coolant temperature has risen by a least 22 K from engine starting and reaches a minimum temperature of 343 K (70 C).

         2.12.  "Fuel trim" refers to feedback adjustments to the base fuel schedule. Short-term fuel trim refers to dynamic or instantaneous adjustments. Long-term fuel trim refers to much more gradual adjustments to the fuel calibration schedule than short-term trim adjustments. These long-term adjustments compensate for vehicle differences and gradual changes that occur over time.

         2.13.  "Calculated load value" refers to an indication of the current airflow divided by peak airflow, where peak airflow is corrected for altitude, if available. This definition provides a dimensionless number that is not engine specific and provides the service technician with an indication of the proportion of engine capacity that is being used (with wide open throttle as 100 per cent);

   CLV =                        Current airflow      ·  Atmospheric pressure (at sea level)
   Peak airflow (at sea level)  Barometric pressure

         2.14.  "Permanent emission default mode" refers to a case where the engine management controller permanently switches to a setting that does not require an input from a failed component or system where such a failed component or system would result in an increase in emissions from the vehicle to a level above the limits given in paragraph 3.3.2. of this Annex.

         2.15.  "Power take-off unit" means an engine-driven output provision for the purposes of powering auxiliary, vehicle mounted, equipment.

         2.16.  "Access" means the availability of all emission-related OBD data including all fault codes required for the inspection, diagnosis, servicing or repair of emissions-related parts of the vehicle, via the serial interface for the standard diagnostic connection (pursuant to Appendix 1 to this Annex, paragraph 6.5.3.5.).

         2.17.  "Unrestricted" means:

         2.17.1 access not dependent on an access code obtainable only from the manufacturer, or a similar device, or

         2.17.2. access allowing evaluation of the data produced without the need for any unique decoding information, unless that information itself is standardised.

         2.18.  "Standardised" means that all data stream information, including all fault codes used, shall be produced only in accordance with industry standards which, by virtue of the fact that their format and their permitted options are clearly defined, provide for a maximum level of harmonisation in the motor vehicle industry, and whose use is expressly permitted