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Division 8.2.2 Compression ignition engine emissionsX1

United Kingdom

Original text. Later amendments are not shown.

8.2.2.1.

Exhaust emission control equipment

Visual inspection

(a)

Emission control equipment fitted by the manufacturer absent or obviously defective.

X

(b)

Leaks which would affect emission measurements.

X

8.2.2.2.

Opacity

Vehicles registered or put into service before 1 January 1980 are exempted from this requirement

  • For vehicles up to emission classes Euro 5 and Euro V ( 7 ):

    Exhaust gas opacity to be measured during free acceleration (no load from idle up to cut-off speed) with gear lever in neutral and clutch engaged or reading of OBD. The tailpipe testing shall be the default method of exhaust emission assessment. On the basis of an assessment of equivalence, Member States may authorise the use of OBD in accordance with the manufacturer's recommendations and other requirements.

  • For vehicles as of emission classes Euro 6 and Euro VI ( 8 ):

    Exhaust gas opacity to be measured during free acceleration (no load from idle up to cut-off speed) with gear lever in neutral and clutch engaged or reading of OBD in accordance with the manufacturer's recommendations and other requirements 1 .

Vehicle preconditioning:

  1. 1..

    Vehicles may be tested without preconditioning, although for safety reasons checks should be made that the engine is warm and in a satisfactory mechanical condition.

(a)

For vehicles registered or put into service for the first time after the date specified in requirements 1 .

opacity exceeds the level recorded on the manufacturer's plate on the vehicle;

X
Item Method Reasons for failure Assessment of deficiencies
Minor Major Dangerous

2.

Precondition requirements:

  1. (i)

    Engine shall be fully warm, for instance the engine oil temperature measured by a probe in the oil level dipstick tube to be at least 80 °C, or normal operating temperature if lower, or the engine block temperature measured by the level of infrared radiation to be at least an equivalent temperature. If, owing to the vehicle configuration, this measurement is impractical, the establishment of the engine's normal operating temperature may be made by other means, for example by the operation of the engine cooling fan.

  2. (ii)

    Exhaust system shall be purged by at least three free acceleration cycles or by an equivalent method.

(b)

Where this information is not available or requirements 1 do not allow the use of reference values,

  • for naturally aspirated engines: 2,5 m –1 ,

  • for turbo-charged engines: 3,0 m –1 , or

  • for vehicles identified in requirements 1 or first registered or put into service for the first time after the date specified in requirements 1 :

    • 1,5 m –1  ( 9 )

    • or 0,7 m –1  ( 8 )

X
Item Method Reasons for failure Assessment of deficiencies
Minor Major Dangerous

Test procedure:

  1. 1..

    Engine and any turbocharger fitted, to be at idle before the start of each free acceleration cycle. For heavy-duty diesels, this means waiting for at least 10 seconds after the release of the throttle.

  2. 2..

    To initiate each free acceleration cycle, the throttle pedal must be fully depressed quickly and continuously (in less than one second) but not violently, so as to obtain maximum delivery from the injection pump.

  3. 3..

    During each free acceleration cycle, the engine shall reach cut-off speed or, for vehicles with automatic transmissions, the speed specified by the manufacturer or, if this data is not available, then two thirds of the cut-off speed, before the throttle is released. This could be checked, for instance, by monitoring engine speed or by allowing a sufficient time to elapse between initial throttle depression and release, which in the case of vehicles of categories M 2 , M 3 , N 2 and N 3 , should be at least two seconds.

  4. 4..

    Vehicles shall only be failed if the arithmetic means of at least the last three free acceleration cycles are in excess of the limit value. This may be calculated by ignoring any measurement that departs significantly from the measured mean, or the result of any other statistical calculation that takes account of the scattering of the measurements. Member States may limit the number of test cycles.

Item Method Reasons for failure Assessment of deficiencies
Minor Major Dangerous

5.

To avoid unnecessary testing, Member States may fail vehicles which have measured values significantly in excess of the limit values after fewer than three free acceleration cycles or after the purging cycles. Equally to avoid unnecessary testing, Member States may pass vehicles which have measured values significantly below the limits after fewer than three free acceleration cycles or after the purging cycles

Annotations

Editorial notes

X1

Substituted by Corrigendum to Directive 2014/45/EU of the European Parliament and of the Council of 3 April 2014 on periodic roadworthiness tests for motor vehicles and their trailers and repealing Directive 2009/40/EC (Official Journal of the European Union L 127 of 29 April 2014).