Quote:
Originally Posted by me and my metro
Is this also going to be used for emission testing. Seems like the Diesels from several manufacturers have been scamming the tests. VW got caught and there have been rumors about several others.
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It is the old test - NEDC - that the manufacturers were scamming. In the case of the VAG group, their diesels could detect when they were being tested on a chassis dyno compared to driven on the road.
From April 2020 in Europe all new cars fuel consumption and CO2 data will be based on the new WLTP test procedure, which is still carried out on chassis dynos.
One advantage of the new test is that the average speed is now 28.9 mph vs
21 mph for the old NEDC.
The test is also now 14.4 miles in length compared to 6.8 miles for the NEDC.
One problem with the old test was that a manufacturer could bring out a very basic version of a new model of car and the aero data and mass of that vehicle could be used for subsequent testing of related models even though these models are less aerodynamic - bigger tyres, alloy wheels, body kit, larger radiator intakes etc - and are considerably heavier.
Now all versions of a model have to be tested individually even if there is only a small difference in design such as wider wheels.
Some more info here
https://www.parkers.co.uk/what-is/wl...est-procedure/
The pollutants part of the test will be carried out on the open road.