- Y Diweddaraf sydd Ar Gael (Diwygiedig)
- Pwynt Penodol mewn Amser (01/03/2019)
- Gwreiddiol (Fel y’i mabwysiadwyd gan yr UE)
Commission Regulation (EU) 2017/2400 of 12 December 2017 implementing Regulation (EC) No 595/2009 of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles and amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EU) No 582/2011 (Text with EEA relevance)
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Point in time view as at 01/03/2019.
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The engine torque shall be measured at engine motoring with and without fan engaged with the following procedure:
Install the fan according to product instruction before the test starts.
Warm up phase: The engine shall be warmed up according to the recommendation of the manufacturer and by practicing good engineering judgement (eg operating the engine for 20 minutes at mode 9, as defined in Table 1 of paragraph 7.2.2. of Annex 4 to UN/ECE Regulation 49 Rev.06).
[F1Stabilization phase: After the warm-up or optional warm-up step (v) is completed the engine shall be operated with minimum operator demand (motoring) at engine speed n pref for 130 ± 2 seconds with the fan disengaged (n fan_disengage < 0,75 * n engine * r fan ). The first 60 ± 1 seconds of this period are considered as a stabilization period, during which the actual engine speed shall be held within ± 5 min – 1 of n pref .]
Measurement phase: During the following period of 60 ± 1 seconds the actual engine speed shall be held within ± 2 min– 1 of npref and the coolant temperature within ± 5 °C while the torque for motoring the engine with the fan disengaged, the fan speed and the engine speed shall be recorded as an average value over this period of 60 ± 1 seconds. The remaining period of 10 ± 1 seconds shall be used for data post-processing and storage if necessary.
Optional warmup phase: Upon manufacturer's request and according to good engineering judgement step (ii) can be repeated (e.g. if the temperature has dropped more than 5 °C)
Stabilization phase: After the optional warm-up is completed the engine shall be operated with minimum operator demand (motoring) at engine speed npref for 130 ± 2 seconds with the fan engaged (nfan_engage > 0,9 * nengine * rfan) The first 60 ± 1 seconds of this period are considered as a stabilization period, during which the actual engine speed shall be held within ± 5 min– 1 of npref.
Measurement phase: During the following period of 60 ± 1 seconds the actual engine speed shall be held within ± 2 min– 1 of npref and the coolant temperature within ± 5 °C while the torque for motoring the engine with the fan engaged, the fan speed and the engine speed shall be recorded as an average value over this period of 60 ± 1 seconds. The remaining period of 10±1 seconds shall be used for data post-processing and storage if necessary.
Steps (iii) to (vii) shall be repeated at engine speeds n95h and nhi instead of npref, with an optional warmup step (v) before each stabilization step if needed to maintain a stable coolant temperature (± 5 °C), according to good engineering judgement.
If the standard deviation of all calculated Ci according to the equation below at the three speeds npref, n95h and nhi is equal or higher than 3 percent, the measurement shall be performed for all engine speeds defining the grid for the fuel mapping procedure (FCMC) according to paragraph 4.3.5.2.1.
Textual Amendments
F1 Substituted by Commission Regulation (EU) 2019/318 of 19 February 2019 amending Regulation (EU) 2017/2400 and Directive 2007/46/EC of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles (Text with EEA relevance).
The actual fan constant shall be calculated from the measurement data according to the following equation:
where:
fan constant at certain engine speed
measured engine torque at motoring with fan disengaged (Nm)
measured engine torque at motoring with fan engaged (Nm)
fan speed with fan engaged (min– 1)
fan speed with fan disengaged min– 1)
ratio of the speed of the engine-side of the fan clutch to the speed of the crankshaft]
If the standard deviation of all calculated Ci at the three speeds npref, n95h and nhi is less than 3 %, an average value Cavg-fan determined over the three speeds npref, n95h and nhi shall be used for the fan constant.
If the standard deviation of all calculated Ci at the three speeds npref, n95h and nhi is equal or higher than 3 %, individual values determined for all engine speeds according to point (ix) shall be used for the fan constant Cind-fan,i. The value of the fan constant for the actual engine speed Cfan, shall be determined by linear interpolation between the individual values Cind-fan,i of the fan constant.
The engine torque for driving the fan shall be calculated according to the following equation:
Mfan = Cfan · nfan 2 · 10– 6
where:
engine torque for driving fan (Nm)
fan constant Cavg-fan or Cind-fan,i corresponding to nengine
The mechanical power consumed by the fan shall be calculated from the engine torque for driving the fan and the actual engine speed. Mechanical power and engine torque shall be taken into account in accordance with paragraph 3.1.2.
The electric power supplied externally to electric engine components shall be measured. This measured value shall be corrected to mechanical power by dividing it by a generic efficiency value of 0,65. This mechanical power and the corresponding engine torque shall be taken into account in accordance with paragraph 3.1.2.
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