Report - DCE - Nationalt Center for Miljø og Energi

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PRE ECE ECE 15/00-01 ECE 15/02
ECE 15/03 ECE 15/04 Euro I
Euro II Euro III Euro IV
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Conventional Euro I Euro II Euro III Euro IV Euro V
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Conventional Euro I Euro II Euro III Euro IV Euro V
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Conventional Euro I Euro II Euro III Euro IV Euro V
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For Euro 1-4 passenger cars and light duty trucks, the chassis dynamometer
test cycle used in the EU for emission approval is the NEDC (New European
Driving Cycle), see Nørgaard and Hansen (2004). The test cycle is also used
also for fuel consumption measurements. The NEDC cycle consists of two
parts, the first part being a 4-time repetition (driving length: 4 km) of the
ECE test cycle. The latter test cycle is the so-called urban driving cycle3 (average
speed: 19 km pr h). The second part of the test is the run-through of
the EUDC (Extra Urban Driving Cycle) test driving segment, simulating the
fuel consumption under rural and highway driving conditions. The driving
length of EUDC is 7 km at an average speed of 63 km pr h. More information
regarding the fuel measurement procedure can be found in the EU-directive
80/1268/EØF.
For NOx, VOC (NMVOC + CH4), CO and PM, the emissions from road
transport vehicles have to comply with the different EU directives listed in
Table 3.28. The emission directives distinguish between three vehicle classes
according to vehicle reference mass 4 : Passenger cars and light duty trucks
(1760
kg).The specific emission limits are shown in Annex 2.B.3.
In practice, the emissions from vehicles in traffic are different from the legislation
limit values and, therefore, the latter figures are considered to be too
inaccurate for total emission calculations. A major constraint is that the
emission approval test conditions reflect only to a small degree the large variety
of emission influencing factors in the real traffic situation, such as cumulated
mileage driven, engine and exhaust after treatment maintenance
levels and driving behaviour.
3 For Euro 3 and on, the emission approval test procedure was slightly changed. The
40 s engine warm up phase before start of the urban driving cycle was removed.
4 Reference mass: net vehicle weight + mass of fuel and other liquids + 100 kg.
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