Passed Emergency AU Exam Today?

I had my vehicle inspection (TÜV) and emissions test (AU) appointment today.

I passed the TÜV inspection without any noticeable defects.

During the subsequent emissions test and the initial free acceleration to test the rev limiter, it went into limp mode. My 17-size turbocharger probably doesn't like free acceleration! I'll have to adjust the variable turbine geometry (VTG) rod again.

'For the three subsequent measurements, I only used a maximum boost pressure of 0.5 bar. The turbidity detected during these measurements was 1.9, which is very close to the limit, and I wonder if the maximum values set by the legislature are not already outdated.'

If a heavily modified AFN engine with 270,000 km on the clock, which has been chip-tuned and is in a limp mode, passes a mandatory emissions test, then the established values are likely not accurate.

Does a EU4 diesel engine actually have a maximum opacity of 2.0?

A final measurement without the engine running showed a turbidity of 0.5. However, since I was controlling the boost pressure with the accelerator pedal, the acceleration time was, of course, incorrect! Therefore, the emissions test was not passed.

Regards,

Manuel.

Manuel Thomas wrote:

... However, I still wonder if the maximum values set by the legislature have long been outdated.

Yes... the AU only measures house numbers, anyway.

Quote:

Does a EU4 diesel engine actually have a maximum opacity of 2.0?

Also, yes... even DPF vehicles have a maximum permissible opacity of 2.0 .

AU = Absolutely Unreasonable.

The whole thing is nothing but a complete mess. Besides costing money, it doesn't really achieve anything worthwhile. They should focus the measurement on CO2 emissions and then base the taxation on that.