Document ID: chunk:federal_register_of_legislation:F2023L00129:front:0:p17
Version: federal_register_of_legislation:F2023L00129
Segment Type: other
Provision Reference: 
Character Range: 47489–50782

during normal in-use operation once the maintenance is performed;

              2.40. "On-board diagnostic system" (OBD system) means a system on-board of a vehicle or engine which has the capability of:

                  (a) Detecting malfunctions, affecting the emission performance of the engine system;

              (b) Indicating their occurrence by means of an alert system; and

                  (c) Identifying the likely area of the malfunction by means of information stored in computer memory and communicating that information off-board;

              2.41. "OBD engine family" means a manufacturer's grouping of engine systems having common methods of monitoring and diagnosing emission-related malfunctions;

              2.42. "Operating sequence" means a sequence consisting of an engine start, an operating period (of the engine), an engine shut-off, and the time until the next start, where a specific OBD monitor runs to completion and a malfunction would be detected if present;

              2.43. "Original pollution control device" means a pollution control device or an assembly of such devices covered by the type approval granted for the vehicle concerned;

              2.44. "Parent engine" means an engine selected from an engine family in such a way that its emissions characteristics will be representative for that engine family;

              2.45. "Particulate after-treatment device" means an exhaust after-treatment system designed to reduce emissions of particulate pollutants (PT) through a mechanical, aerodynamic, diffusional or inertial separation;

              2.46. "Particulate matter (PM)" means any material collected on a specified filter medium after diluting exhaust with a clean filtered diluent to a temperature between 315 K (42 °C) and 325 K (52 °C); this is primarily carbon, condensed hydrocarbons, and sulphates with associated water;

              2.46.1. "Particulate Matter number" (PM number) means the total number of solid particles emitted from the exhaust quantified according to the dilution, sampling and measurement methods as specified in Annex 4.

              2.47. "Per cent load" means the fraction of the maximum available torque at an engine speed;

              2.48.  "Performance monitoring" means malfunction monitoring, that consists of functionality checks and the monitoring of parameters that are not directly correlated to emission thresholds, and that is done on components or systems to verify that they are operating within the proper range;

              2.49. "Periodic regeneration" means the regeneration process of an emission control device that occurs periodically in less than 100 hours of normal engine operation;

              2.50. "Portable emissions measurement system" (PEMS) means a portable emissions measurement system meeting the requirements specified in Appendix 2 to Annex 8 of this Regulation;

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

2.52. "Qualified deteriorated component or system (QDC) " means a component or a system that has been intentionally deteriorated such as by accelerated ageing or by having been manipulated in a controlled manner and which has