Document ID: chunk:federal_register_of_legislation:F2023L00129:front:0:p15
Version: federal_register_of_legislation:F2023L00129
Segment Type: other
Provision Reference: 
Character Range: 41734–45051

that is designed to simultaneously operate with diesel fuel and a gaseous fuel, both fuels being metered separately, where the consumed amount of one of the fuels relative to the other one may vary depending on the operation;

              2.16. "Dual-fuel mode" means the normal operating mode of a dual-fuel engine during which the engine simultaneously uses diesel fuel and a gaseous fuel at some engine operating conditions;

              2.17. "Dual-fuel vehicle" means a vehicle that is powered by a dual-fuel engine and that supplies the fuels used by the engine from separate on-board storage systems;"

              2.18. "Element of design" means in respect of a vehicle or engine:

              (a) Any element of the engine system;

                  (b) Any control system, including: computer software; electronic control systems; and computer logic;

              (c) Any control system calibration; or

              (d) The results of any interaction of systems;

              2.19. "Emission control monitoring system" means the system that ensures correct operation of the NOx control measures implemented in the engine system according to the requirements of paragraph 5.5;

              "Emission control system" means the elements of design and emission strategies developed or calibrated for the purpose of controlling emissions;

              2.20. "Emission related maintenance" means the maintenance which substantially affects emissions or which is likely to affect emissions deterioration of the vehicle or the engine during normal in-use operation;

              2.21. "Emission strategy" means an element or set of elements of design that is incorporated into the overall design of an engine system or vehicle and used in controlling emissions;

              2.22. "Engine after-treatment system family" means a manufacturer's grouping of engines that comply with the definition of engine family, but which are further grouped into engines utilising a similar exhaust after-treatment system;

              2.23. "Engine family" means a manufacturer's grouping of engines which through their design, as defined in paragraph 7. of this Regulation, have similar exhaust emission characteristics;

              2.24. "Engine system" means the engine, the emission control system and the communication interface (hardware and messages) between the engine system electronic control unit or units (ECU) and any other powertrain or vehicle control unit;

              2.25. "Engine start" consists of the ignition-On, cranking and start of combustion, and is completed when the engine speed reaches 150 min-1 below the normal, warmed-up idle speed;

              2.26. "Engine type" means a category of engines which do not differ in essential engine characteristics as set out in Annex 1;

              2.27. "Exhaust after-treatment system" means a catalyst (oxidation, 3-way or any other), particulate filter, deNOx system, combined deNOx particulate filter, or any other emission reducing device, that is installed downstream of the engine;

              2.28. "Gaseous pollutants" means the exhaust gas emissions of carbon monoxide, NOx, expressed in NO2 equivalent, hydrocarbons (i.e. total hydrocarbons, non-methane hydrocarbons and methane);

              2.29. "General