{
  "url": "https://openlegislation.uk/eu-regulation-2017-1221/annex",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-1221/annex.json",
  "legislation": "eur/2017/1221",
  "legislation_title": "Commission Regulation (EU) 2017/1221 of 22 June 2017 amending Regulation (EC) No 692/2008 as regards the methodology for the determination of evaporative emissions (Type 4 test) (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-1221",
  "path": "annex",
  "kind": "annex",
  "number": null,
  "heading": null,
  "text": "‘ANNEX VI\n1.\nIntroduction\n1.1.\nThis Annex describes the procedure for the Type 4 test, which determines the emission of hydrocarbons by evaporation from the fuel systems of vehicles with positive ignition engines.\n2.\nTechnical requirements\n2.1.\nIntroduction\nThe procedure includes the evaporative emissions test and two additional tests, one for the aging of the carbon canister, as described in point 5.1, and one for the permeability of the fuel storage system, as described in point 5.2.\nThe evaporative emissions test (Figure 1) is designed to determine hydrocarbon evaporative emissions as a consequence of diurnal temperatures fluctuation, hot soaks during parking, and urban driving.\n2.2\nThe evaporative emissions test consists of:\n(a) Test drive including an urban (Part One) and an extra-urban (Part Two) driving cycle, followed by two urban (Part One) driving cycles,\n(b) Hot soak loss determination,\n(c) Diurnal loss determination.\nThe mass emissions of hydrocarbons from the hot soak and the diurnal loss phases are added up together with the permeability factor to provide an overall result for the test.\n3.\nVehicle and fuel\n3.1.\nVehicle\n3.1.1.\nThe vehicle shall be in good mechanical condition and have been run in and driven at least 3 000 km before the test. For the purpose of the determination of evaporative emissions, the mileage and the age of the vehicle used for certification shall be recorded. The evaporative emission control system shall be connected and have been functioning correctly over the run in period and the carbon canister(s) shall have been subject to normal use, neither undergoing abnormal purging nor abnormal loading. The carbon canister(s) aged according to the Procedure set out in point 5.1 shall be connected as described in Figure 1.\n3.2.\nFuel\n3.2.1.\nThe Type I E10 reference fuel specified in Annex IX to Regulation (EC) No 692/2008 shall be used. For the purposes of this Regulation, E10 reference shall mean the Type I reference fuel, except for the canister aging, as set out in point 5.1.\n4.\nTest equipment for evaporative test\n4.1.\nChassis dynamometer\nThe chassis dynamometer shall meet the requirements of Appendix 1 of Annex 4a to UN/ECE Regulation No 83.\n4.2.\nEvaporative emission measurement enclosure\nThe evaporative emission measurement enclosure shall meet the requirements of paragraph 4.2 of Annex 7 to UN/ECE Regulation No 83.\nFigure 1\nDetermination of evaporative emissions\n3 000 km run-in period (no excessive purge/load)\nUse of aged of canister(s)\nSteam-clean of vehicle (if necessary)\nReducing or removing non-fuel background emission sources (if agreed)\nNotes:\n1.. Evaporative emission control families — as in point 3.2 of Annex I\n2.. Exhaust emissions may be measured during Type I test drive but these are not used for legislative purposes. Exhaust emission legislative test remains separate.\n4.3.\nAnalytical systems\nThe analytical systems shall meet the requirements of paragraph 4.3 of Annex 7 to UN/ECE Regulation No 83.\n4.4.\nTemperature recording\nThe temperature recording shall meet the requirements of paragraph 4.5 of Annex 7 to UN/ECE Regulation No 83.\n4.5.\nPressure recording\nThe pressure recording shall meet the requirements of paragraph 4.6 of Annex 7 to UN/ECE Regulation No 83.\n4.6.\nFans\nThe fans shall meet the requirements of paragraph 4.7 of Annex 7 to UN/ECE Regulation No 83.\n4.7.\nGases\nThe gases shall meet the requirements of paragraph 4.8 of Annex 7 to UN/ECE Regulation No 83.\n4.8.\nAdditional Equipment\nThe additional equipment shall meet the requirements of paragraph 4.9 of Annex 7 to UN/ECE Regulation No 83.\n5.\nTest procedure\n5.1.\nCanister(s) bench aging\nBefore performing the hot soak and diurnal losses sequences, the canister(s) must be aged according the following procedure described in Figure 2.\nFigure 2\nCanister bench aging procedure\n5.1.1.\nTemperature conditioning test\nIn a dedicated temperature chamber, the canister(s) is (are) cycled between temperatures from – 15 °C to 60 °C, with 30 min of stabilisation at – 15 °C and 60 °C. Each cycle shall last 210 min as in Figure 3. The temperature gradient shall be as close as possible to 1 °C/min. No forced air flow should pass through the canister(s).\nThe cycle is repeated 50 times consecutively. In total, this operation will last 175 hours.\nFigure 3\nTemperature conditioning cycle\n5.1.2.\nCanister vibration conditioning test\nAfter the temperature aging procedure, the canister(s) is (are) shaken along the vertical axis with the canister(s) mounted as per its orientation in the vehicle with overall Grms > 1,5 m/sec2 with frequency of 30 ± 10 Hz. The test shall last 12 hours.\n5.1.3.\nCanister Fuel aging test\n5.1.3.1.\nFuel Aging for 300 cycles\n5.1.3.1.1.\nAfter the temperature conditioning test and vibration test, the canister(s) is aged with a mixture of Type I E10 market fuel as specified in point 5.1.3.1.1.1 below and nitrogen or air with a 50 ± 15 percent fuel vapour volume. The fuel vapour fill rate must be kept between 60 ± 20 g/h.\nThe canister(s) is (are) loaded to the corresponding breakthrough. Breakthrough shall be considered as the point at which the cumulative quantity of hydrocarbons emitted is equal to 2 grams. As an alternative, the loading is deemed completed when the equivalent concentration level at the vent hole reaches 3 000 ppm.\n5.1.3.1.1.1\nThe E10 market fuel used for this test shall fulfil the same requirements as an E10 reference fuel for the following points:\nDensity at 15 °C\nVapour Pressure (DVPE)\nDistillation (evaporates only)\nHydrocarbon analysis (olefins, aromatics, benzene only)\nOxygen content\nEthanol content\n5.1.3.1.2.\nThe canister(s) shall be purged according the procedure of paragraph 5.1.3.8 of Annex 7 to UN/ECE Regulation No 83. The standard conditions are 273,2 K and 101,33 kPa.\nThe canister must be purged between 5 minutes to 1 hour maximum after loading.\n5.1.3.1.3.\nThe steps of the procedure set out in points 5.1.3.1.1 and.5.1.3.1.2 shall be repeated 50 times, followed by a measurement of the Butane Working Capacity (BWC), meant as the ability of an activated carbon canister to absorb and desorb butane from dry air under specified conditions, in 5 butane cycles, as described in point 5.1.3.1.4 below. The fuel vapour ageing will continue until 300 cycles are reached. A measurement of the BWC in 5 butane cycles, as set out in point 5.1.3.1.4, will be made after the 300 cycles.\n5.1.3.1.4.\nAfter 50 and 300 Fuel aging cycles, a measurement of BWC is performed. This measurement consists of loading the canister according to paragraph 5.1.6.3, of Annex 7 to UN/ECE Regulation No 83 until breakthrough. The BWC is recorded.\nThen, the canister(s) shall be purged according the procedure of paragraph 5.1.3.8 of Annex 7 to UN/ECE Regulation No 83.\nThe canister must be purged between 5 minutes to 1 hour maximum after loading.\nThe operation of butane loading is repeated 5 times. The BWC is recorded after each butane loading step. The BWC50 is calculated as the average of the 5 BWC and recorded.\nIn total, the canister(s) will be aged with 300 fuel aging cycles + 10 butane cycles and considered to be stabilised.\n5.1.3.2.\nIf the canister(s) is (are) provided by the Suppliers, the Manufacturers shall inform in advance the Type-Approval Authorities to allow them to witness any part of the aging in the Supplier's facilities.\n5.1.3.3.\nThe manufacturer shall provide to the Type-Approval Authorities a test report including at least the following elements:\nType of activated carbon,\nLoading rate,\nFuel specifications,\nBWC measurements\n5.2.\nDetermination of the Permeability Factor of the Fuel System (Figure 4)\nFigure 4\nDetermination of the Permeability Factor\nThe fuel storage system representative of a family is selected and fixed to a rig, then soaked with E10 reference fuel for 20 weeks at 40 °C +/– 2 °C. The orientation of the fuel storage system on the rig has to be similar to the original orientation on the vehicle.\n5.2.1.\nThe tank is filled with fresh E10 reference fuel at a temperature of 18 °C ± 8 °C. The tank is filled at 40 % +/– 2 % of the nominal tank capacity. Then, the rig with the fuel system is placed in a specific and secure room with a controlled temperature of 40 °C +/– 2 °C for 3 weeks.\n5.2.2.\nAt the end of the third week, the tank is drained and refilled with fresh E10 reference fuel at a temperature of 18 °C ± 8 °C at 40 % +/– 2 % of the nominal tank capacity.\nWithin 6 to 36 hours, the last 6 hours at 20 °C ± 2 °C the rig with the fuel system is placed in a VT-SHED a diurnal procedure is performed over a period of 24 hours, according to the procedure described according to paragraph 5.7 of Annex 7 of UN/ECE Regulation No 83. The fuel system is vented to the outside of the VT-SHED to eliminate the possibility of the tank venting emissions being counted as permeation. The HC emissions are measured and the value is recorded as HC3W.\n5.2.3.\nThe rig with the fuel system is placed again in a specific and secure room with a controlled temperature of 40 °C +/– 2 °C for the remaining 17 weeks.\n5.2.4.\nAt the end of the remaining 17th week, the tank is drained and refilled with fresh reference fuel at a temperature of 18 °C ± 8 °C at 40 % +/– 2 % of the nominal tank capacity.\nWithin 6 to 36 hours, the last 6 hours at 20 °C ± 2 °C, the rig with the fuel system is placed in a VT-SHED a diurnal procedure is performed over a period of 24 hours, according to the procedure described according to paragraph 5.7 of Annex 7 of UN/ECE Regulation No 83. The fuel system is vented to the outside of the VT-SHED to eliminate the possibility of the tank venting emissions being counted as permeation. The HC emissions are measured and the value is recorded as HC20W.\n5.2.5.\nThe Permeability Factor is the difference between HC20W and HC3W in g/24 h with 3 digits.\n5.2.6.\nIf the Permeability Factor is determined by the Suppliers, the Manufacturers shall inform in advance the Type-Approval Authorities to allow witness check in Supplier's facilities.\n5.2.7.\nThe manufacturer shall provide to the Type-Approval Authorities a test report containing at least the following elements:\n(a) A full description of the fuel storage system tested, including information on the type of tank tested, whether the tank is monolayer or multilayer and which types of materials are used for the tank and other parts of the fuel storage system,\n(b) the weekly mean temperatures at which the ageing was performed,\n(c) the HC measured at week 3 (HC3W),\n(d) the HC measured at week 20 (HC20W)\n(e) the resulting Permeability Factor (PF)\n5.2.8.\nAs an exception to points 5.2.1 to 5.2.7 above, the Manufacturers using multilayer tanks may choose to use the following assigned permeability factor (APF) instead of the complete measurement procedure mentioned above:\nAPF multilayer tank = 120 mg/24 h\n5.2.8.1\nWhere the manufacturer chooses to use Assigned Permeability Factors, the manufacturer shall provide to the Type-Approval Authority, a declaration in which the type of tank is clearly specified, as well as a declaration of the type of materials used.\n5.3.\nSequence of measurement of hot soak and diurnal losses\nThe vehicle is prepared in accordance to paragraph 5.1.1 and 5.1.2 of Annex 7 of UN/ECE Regulation No 83. At the request of the manufacturer and with the approval of the responsible authority, non-fuel background emission sources may be removed or reduced before testing (e.g. baking tire or vehicle, removing washer fluid).\n5.3.1.\nSoak\nThe vehicle is parked for a minimum of 12 hours and a maximum of 36 hours in the soak area. The engine oil and coolant temperatures shall have reached the temperature of the area or within ± 3 °C of it at the end of the period.\n5.3.2.\nFuel drain and refill\nThe fuel drain and refill is performed in accordance to the procedure of paragraph 5.1.7 of Annex 7 of UN/ECE Regulation No 83.\n5.3.3.\nPreconditioning drive\nWithin one hour from the completing of fuel drain and refill, the vehicle is placed on the chassis dynamometer and driven through one Part One and two Part Two driving cycles of Type I according to Annex 4a to UN/ECE Regulation No 83.\nExhaust emissions are not sampled during this operation.\n5.3.4.\nSoak\nWithin five minutes of completing the preconditioning operation the vehicle is parked for a minimum of 12 hours and a maximum of 36 hours in the soak area. The engine oil and coolant temperatures shall have reached the temperature of the area or within ± 3 °C of it at the end of the period.\n5.3.5.\nCanister breakthrough\nThe canister(s) aged according to the sequence described in point 5.1 is loaded to breakthrough according to the procedure paragraph 5.1.4 of Annex 7 to UN/ECE Regulation No 83.\n5.3.6.\nDynamometer test\n5.3.6.1.\nWithin one hour from completing of canister loading, the vehicle is placed on the chassis dynamometer and driven through one Part One and one Part Two driving cycles of Type I according to Annex 4a to UN/ECE Regulation No 83. Then the engine is shut off. Exhaust emissions may be sampled during this operation but the results shall not be used for the purpose of exhaust emission type-approval.\n5.3.6.2.\nWithin two minutes of completing the Type I Test drive specified in point 5.3.6.1 the vehicle is driven a further conditioning drive consisting of two Part One test cycles (hot start) of Type I. Then the engine is shut off again. Exhaust emissions need not be sampled during this operation.\n5.3.7.\nHot Soak\nAfter the Dynamometer test, hot soak evaporative emissions test is performed in accordance to paragraph 5.5 of Annex 7 to UN/ECE Regulation No 83. The hot soak losses result is calculated according to paragraph 6 of Annex 7 to UN/ECE Regulation No 83 and recorded as MHS.\n5.3.8.\nSoak\nAfter hot soak evaporative emissions test, a soak is performed according to paragraph 5.6 of Annex 7 to UN/ECE Regulation No 83.\n5.3.9.\nDiurnal test\n5.3.9.1.\nAfter the soak, a first measurement of Diurnal Losses over 24 hours is performed according to paragraph 5.7 of Annex 7 to UN/ECE Regulation No 83. Emissions are calculated according to paragraph 6 of Annex 7 to UN/ECE Regulation No 83. The obtained value is recorded as MD1.\n5.3.9.2.\nAfter the first 24 hours diurnal test, a second measurement of Diurnal Losses over 24 hours is performed according to paragraph 5.7 of Annex 7 to UN/ECE Regulation No 83. Emissions are calculated according to paragraph 6 of Annex 7 to UN/ECE Regulation No 83. The obtained value is recorded as MD2.\n5.3.10.\nCalculation\nThe result of MHS + MD1 + MD2 + 2PF shall be below the limit defined in Table 3 of Annex 1 to Regulation (EC) No 715/2007.\n5.3.11\nThe manufacturer shall provide to the Type-Approval Authorities a test report containing at least the following elements:\n(a) description of the soak periods, including time and mean temperatures\n(b) description to aged canister used and reference to exact ageing report\n(c) mean temperature during the hot soak test\n(d) measurement during hot soak test, HSL\n(e) measurement of first diurnal, DL1st day\n(f) measurement of second diurnal, DL2nd day\n(g) final evaporative test result, calculated as “MHS + MD1 + MD2 + 2PF”’",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "Grms The root mean square (rms) value of the vibration signal is calculated by squaring the magnitude of the signal at every point, finding the average (mean) value of the squared magnitude, then taking the square root of the average value. The resulting number is the Grms metric."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/1221/annex",
    "retrieved_at": "2026-11-01T14:44:46.020080+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."
}