Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:5:p15
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 5 (pt 15/36)
Character Range: 461361–464411

set of torque limiters;

         "engine type" means a category of engines which do not differ in such essential respects as engine characteristics as defined in Annex II to this Directive;

         "exhaust aftertreatment system" means a catalyst (oxidation or 3-way), particulate filter, deNOx system, combined deNOx particulate fil- ter or any other emission-reducing device that is installed downstream of the engine. This definition excludes exhaust gas recirculation, which, where fitted, is considered an integral part of the engine system;

         "gas engine" means a positive-ignition engine which is fuelled with natural gas (NG) or liquefied petroleum gas (LPG);

         "gaseous pollutants" means carbon monoxide, hydrocarbons (assuming a ratio of CH1,85 for diesel, CH2,525 for LPG and CH2,93 for NG (NMHC) and an assumed molecule CH3O0,5 for ethanol-fuelled diesel engines), methane (assuming a ratio of CH4 for NG) and oxides of nitrogen, the last-named being expressed in nitrogen dioxide (NO2) equivalent;

         "high speed (nhi)" means the highest engine speed where 70 % of the declared maximum power occurs; "low speed (nlo)" means the lowest engine speed where 50 % of the declared maximum power occurs;
         "major functional failure" (***) means a permanent or temporary malfunction of any exhaust aftertreatment system that is expected to result in an immediate or delayed increase of the gaseous or particulate emissions of the engine system and which cannot be properly estimated by the OBD system;

         "malfunction" means:

                -          any deterioration or failure, including electrical failures, of the emission control system, that would result in emissions exceeding the OBD threshold limits or, when applicable, in failing to reach the range of functional performance of the exhaust aftertreatment system where the emission of any regulated pollutant would exceed the OBD threshold limits,

                -          any case where the OBD system is not able to fulfil the monitoring requirements of this Directive.

         A manufacturer may nevertheless consider a deterioration or failure that would result in emissions not exceeding the OBD threshold lim- its as a malfunction;

         "malfunction indicator (MI)" means a visual indicator that clearly informs the driver of the vehicle in the event of a malfunction in the sense of this Directive;

         "multi-setting engine" means an engine containing more than one engine setting;

         "NG gas range" means one of the H or L range as defined in European Standard EN 437, dated November 1993;

         "net power" means the power in EC kW obtained on the test bench at the end of the crankshaft, or its equivalent, measured in accor- dance with 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