Document ID: chunk:federal_register_of_legislation:F2011C00805:reg:11:p9
Version: federal_register_of_legislation:F2011C00805
Segment Type: reg
Provision Reference: reg 11 (pt 9/45)
Character Range: 442328–445423

1            ISO 6974
N2                                                            per cent mole  14     12      16           ISO 6974
Sulphur content                                               mg/m3  2/      -      -       10           ISO 6326-5
Wobbe Index (net)                                             MJ/m3  3/      39.4   38.2    40.6

  1/ Inerts (different from N2) + C2 +C2+

  2/ Value to be determined at 293.2 K (20 °C) and 101.3 kPa

  3/ Value to be determined at 273.2 K (0 °C) and 101.3 kPa"

 ________
Annex 11

ON-BOARD DIAGNOSTICS (OBD) FOR MOTOR VEHICLES

         1.  INTRODUCTION

         This Annex applies to the functional aspects of on-board diagnostic (OBD) system for the emission control of motor vehicles.

         2.  DEFINITIONS

         For the purposes of this Annex:

         2.1. "OBD" means an on-board diagnostic system for emission control which shall have the capability of identifying the likely area of malfunction by means of fault codes stored in computer memory.

         2.2. "Vehicle type" means a category of power-driven vehicles which do not differ in such essential engine and OBD system characteristics.

         2.3. "Vehicle family" means a manufacturer's grouping of vehicles which, through their design, are expected to have similar exhaust emission and OBD system characteristics. Each vehicle of this family shall have complied with the requirements of this Regulation as defined in Appendix 2 to this Annex.

         2.4.  "Emission control system" means the electronic engine management controller and any emission-related component in the exhaust or evaporative system which supplies an input to or receives an output from this controller.

         2.5.  "Malfunction indicator (MI)" means a visible or audible indicator that clearly informs the driver of the vehicle in the event of a malfunction of any emission-related component connected to the OBD system, or the OBD system itself.

         2.6. "Malfunction" means the failure of an emission-related component or system that would result in emissions exceeding the limits in paragraph 3.3.2. or if the OBD system is unable to fulfill the basic monitoring requirements of this Annex.

         2.7. "Secondary air" refers to air introduced into the exhaust system by means of a pump or aspirator valve or other means that is intended to aid in the oxidation of HC and CO contained in the exhaust gas stream.

         2.8. "Engine misfire" means lack of combustion in the cylinder of a positive-ignition engine due to absence of spark, poor fuel metering, poor compression or any other cause. In terms of OBD monitoring it is that percentage of misfires out of a total number of firing events (as declared by the manufacturer) that would result in emissions exceeding the limits given in paragraph 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.