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SMMT: Myth-busting – NEDC test cycle

To measure a car’s official fuel consumption and emissions– the figure which manufacturers use on all technical and marketing material – it must undertake the New European Drive Cycle (NEDC). There are a number of myths that surround the fuel consumption and emissions test. So here, in seven simple points, are the unadulterated truths about … Continued

SMMT-NEDC-MythTo measure a car’s official fuel consumption and emissions– the figure which manufacturers use on all technical and marketing material – it must undertake the New European Drive Cycle (NEDC).

There are a number of myths that surround the fuel consumption and emissions test. So here, in seven simple points, are the unadulterated truths about NEDC.

  1. The NEDC test must be witnessed by the Vehicle Certification Agency (VCA) to ensure it meets the standards set out by the European Commission.
  2. All of the vehicle’s components must be present and cannot be tampered with. For example, the alternator belt must be intact and the brakes must function fully to pass testing.
  3. The tests must be done within a controlled range of temperatures, between 20°C and 30°C to be valid.
  4. Testing is always undertaken in specific laboratory conditions on a rolling road, and with a standard drive cycle controlled by a computer programme. In this environment there is no wind or air resistance to take effect on vehicle efficiency.
  5. The vehicle will not pass the test unless it is exactly the same as the one that the manufacturer intends to put on sale.
  6. The vehicle will be checked to ensure it has the same tyre pressures, fluid levels and components as it would have on the road.
  7. Vehicles that come off of the production line are tested at random to ensure that the values given by manufacturers are correct.
https://www.automotiveworld.com/news-releases/smmt-myth-busting-nedc-test-cycle/

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