Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:5:p16
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 5 (pt 16/36)
Character Range: 464145–467129

the EC method of measuring power as set out in Commission Directive 80/1269/EEC (****);

         "OBD" means an on-board diagnostic system for emission control, which has the capability of detecting the occurrence of a malfunction and of identifying the likely area of malfunction by means of fault codes stored in computer memory;

         "OBD-engine family" means, for type-approval of the OBD system according to the requirements of Annex IV to Directive 2005/78/EC, a manufacturer's grouping of engine systems having common OBD system design parameters according to section 8 of this Annex;

         "opacimeter" means an instrument designed to measure the opacity of smoke particles by means of the light extinction principle;

         "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;

         "particulate aftertreatment device" means an exhaust aftertreatment system designed to reduce emissions of particulate pollutants (PT) through a mechanical, aerodynamic, diffusional or inertial separation;

         "particulate pollutants" means any material collected on a specified filter medium after diluting the exhaust with clean filtered air so that the temperature does not exceed 325 K (52 °C);

         "per cent load" means the fraction of the maximum available torque at an engine speed;

         "periodic regeneration" means the regeneration process of an emission control device that occurs periodically in less than 100 hours of normal engine operation. During cycles where regeneration occurs, emission standards can be exceeded.

         "permanent emission default mode" means an AECS activated in the case of a malfunction of the ECS detected by the OBD system that results in the MI being activated and that does not require an input from the failed component or system;

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

         "reagent" means any medium that is stored on-board the vehicle in a tank and provided to the exhaust aftertreatment system (if required) upon request of the emission control system;

         "recalibration" means a fine tuning of an NG engine in order to provide the same performance (power, fuel consumption) in a different range of natural gas;

         "reference speed (nref)" means the 100 per cent speed value to be used for denormalising the relative speed values of the ETC test, as set out in Annex III, Appendix 2 to this Directive;

         "response time" means the difference in time between a rapid change of the component to be measured at the reference point and the appropriate change in the response of the measuring system whereby the change of the measured component is at least 60 % FS and takes place in less than 0,1 second. The system response time (t90) consists of the delay time to the system and