{
  "url": "https://openlegislation.uk/eu-regulation-2014-133/annex-V",
  "json_url": "https://openlegislation.uk/eu-regulation-2014-133/annex-V.json",
  "legislation": "eur/2014/133",
  "legislation_title": "Commission Regulation (EU) No 133/2014 of 31 January 2014 amending, for the purposes of adapting to technical progress as regards emission limits, Directive 2007/46/EC of the European Parliament and of the Council, Regulation (EC) No 595/2009 of the European Parliament and of the Council and Commission Regulation (EU) No 582/2011 (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2014-133",
  "path": "annex/V",
  "kind": "annex",
  "number": "V",
  "heading": null,
  "text": "ANNEX XVIII\nSPECIFIC TECHNICAL REQUIREMENTS FOR DUAL-FUEL ENGINES AND VEHICLES\n1.\nScope\nThis Annex shall apply to the dual-fuel engines and dual-fuel vehicles covered by this Regulation and sets out the additional requirements and exceptions applicable to the manufacturer for the type-approval of dual-fuel engines and vehicles.\n1.1\nDual-fuel engines that operate over the hot part of the WHTC test-cycle with an average gas ratio that does not exceed 10 per cent (GERWHTC ≤ 10 %) and that do not have a diesel mode are prohibited.\n2.\nA list of types of dual-fuel engines covered by this Regulation and of the main operational requirements is provided for in the Appendix.\n3.\nDual-fuel specific approval requirements\n3.1.\nThe dual-fuel specific approval requirements shall be those set out in paragraph 3 of Annex 15 to UNECE Regulation No 49.\n4.\nGeneral requirements\n4.1.\nDual-fuel engines and vehicles shall comply with the general requirements specified in paragraphs 4.1 to 4.7 of Annex 15 to UNECE Regulation No 49.\n5.\nPerformance requirements\n5.1.\nEmission limits applicable to Type 1A and Type 1B dual-fuel engines\n5.1.1.\nThe emission limits applicable to Type 1A and Type 1B dual-fuel engines operating in dual-fuel mode are those set for PI engines in Annex I to Regulation (EC) No 595/2009.\n5.1.2.\nThe emission limits applicable to Type 1B dual-fuel engines operating in diesel mode are those set for CI engines in Annex I to Regulation (EC) No 595/2009.\n5.2.\nEmission limits applicable to Type 2A and Type 2B dual-fuel engines\n5.2.1.\nEmission limits applicable over the WHSC test-cycle\nFor Type 2A and Type 2B dual-fuel engines operating in both diesel and dual-fuel mode, the exhaust emission limits, including the PM number limit, over the WHSC test-cycle are those applicable to CI engines over the WHSC test-cycle as set in Annex I to Regulation (EC) No 595/2009.\n5.2.2.\nEmission limits applicable over the WHTC test-cycle\n5.2.2.1.\nEmission limits for CO, NOx, NH3 and PM mass in dual-fuel mode\nThe CO, NOx, NH3 and PM mass emission limits over the WHTC test-cycle applicable to Type 2A and Type 2B dual-fuel engines operating in dual-fuel mode are those applicable to both CI and PI engines over the WHTC test-cycle as set in Annex I to Regulation (EC) No 595/2009.\n5.2.2.2.\nEmission limits for Hydrocarbons in dual-fuel mode\n5.2.2.2.1.\nNatural Gas/Biomethane engines\nThe THC, NMHC and CH4 emission limits over the WHTC test-cycle applicable to Type 2A and Type 2B dual-fuel engines operating with Natural Gas/Biomethane in dual-fuel mode are calculated from those applicable to CI and PI engines over the WHTC test-cycle as set in Annex I to Regulation (EC) No 595/2009, in accordance with the calculation procedure specified in paragraph 5.2.3 of Annex 15 to UNECE Regulation No 49.\n5.2.2.2.2.\nLPG engines\nThe THC emission limits over the WHTC test-cycle applicable to Type 2A and Type 2B dual-fuel engines operating with LPG in dual-fuel mode are those applicable to CI engines over the WHTC test-cycle as set in Annex I to Regulation (EC) No 595/2009.\n5.2.2.3.\nEmission limits for PM number in dual-fuel mode\nThe PM number limit over the WHTC test-cycle applicable to Type 2A and Type 2B dual-fuel engines operating in dual-fuel mode are calculated from those applicable to CI and PI engines over the WHTC test-cycle as set in Annex I to Regulation (EC) No 595/2009, in accordance with the calculation procedure specified in paragraph 5.2.4 of Annex 15 to UNECE Regulation No 49.\n5.2.2.4.\nEmission limits in diesel mode\nThe emission limits, including the PM number limit, over the WHTC test-cycle applicable to Type 2B dual-fuel engines operating in diesel mode are those set for CI engines in Annex I to Regulation (EC) No 595/2009.\n5.3.\nEmission limits applicable to Type 3B dual-fuel engines\nThe emissions limits applicable to Type 3B dual-fuel engines whether operating in dual-fuel mode or in diesel mode are the exhaust emission limits applicable to CI engines as set in Annex I to Regulation (EC) No 595/2009.\n6.\nDemonstration requirements\n6.1.\nDual-fuel engines and vehicles shall comply with the additional requirements and exceptions related to demonstration set out in paragraph 6 of Annex 15 to UNECE Regulation No 49.\n7.\nDocumentation for installing in a vehicle a type approved dual-fuel engine\n7.1.\nThe manufacturer of a dual-fuel engine type-approved as separate technical unit shall include in the installation documents of its engine system the appropriate requirements that will ensure that the vehicle, when used on the road or elsewhere as appropriate, will comply with the dual-fuel specific requirements set out in this Regulation. This documentation shall include but is not limited to:\n(a) detailed technical requirements, including the provisions ensuring the compatibility with the OBD system of the engine system;\n(b) the verification procedure to be completed.\nThe existence and the adequacy of such installation requirements may be checked during the approval process of the engine system.\n7.2.\nIn the case where the vehicle manufacturer applying for an EC type-approval of the installation of the engine system on the vehicle is the same manufacturer receiving the type-approval of the dual-fuel engine as separate technical unit, the documentation specified in point 7.1 is not required.\nAppendix 1\nTypes of dual-fuel engines and vehicles - list of main operational requirements\nGERWHTC\nIdle on diesel\nWarm-up on diesel\nOperation on diesel solely\nOperation in absence of gas\nComments\nType 1A\nGERWHTC ≥ 90 %\nNOT Allowed\nAllowed only on service mode\nAllowed only on service mode\nService mode\nType 1B\nGERWHTC ≥ 90 %\nAllowed only on Diesel mode\nAllowed only on diesel mode\nAllowed only on diesel & service modes\nDiesel mode\nType 2A\n10 % < GERWHTC < 90 %\nAllowed\nAllowed only on service mode\nAllowed only on service mode\nService mode\nGERWHTC ≥ 90 % allowed\nType 2B\n10 % < GERWHTC < 90 %\nAllowed\nAllowed only on diesel mode\nAllowed only on diesel & service modes\nDiesel mode\nGERWHTC ≥ 90 % allowed\nType 3A\nNEITHER DEFINED NOR ALLOWED",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2014/133/annex/V",
    "retrieved_at": "2026-11-01T14:47:57.596761+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}