Environmental badge does not stop Stinker
Are the current test methods of emissions inspection still time? Especially with diesel experts doubt the validity of the measurement method. The requirements for the diesel study are from the 80s.
The establishment of environmental zones has kicked up some dust. They are supposed to reduce pollution of the inner cities by dangerous particles. Therefore, older diesel vehicles that emit very much soot, were banned from smoking.
Into it since they can only if they are retrofitted with a particulate filter and provided as evidence of the cleaned exhaust gases with an environmental badge. New diesel models have the filter as standard now on board. What is the technological effort, however, brings to the residents, no one can say. For whether the required emission levels are met, not controlled.
The legislature is currently writing, for routine emission test (AU) for diesel vehicles, only one function test and an inspection before the so-called opacity of exhaust gases, said Bert corporal by TUV Nord. The examiner looks in determining whether the exhaust system is technically in order. For cars with on-board diagnostic (OBD) is also controls whether the electronic displays an error.
The measurement of smoke opacity of the exhaust is loud corporal with the so-called Opacimeter: This is the revving of the engine blown gas flow through a meter. This one light beam is sent through a tube filled with the exhaust gas and measuring the light fraction that is swallowed by the waste gases ". The absorption must not exceed specified limits.
A more detailed analysis of the emission behavior is by this method, which was introduced in the 80 years to get the biggest stinker diesel from the road, not possible. It can not determine the amount of corporal, according to the emitted soot particles. However, this is crucial, among other things, whether the car gets an environmental badge - and if so, which.
The experts therefore had to consider within the AU is no possibility that a diesel vehicle bears the red, yellow or green sticker on environmental law, recognizes a corporal. Also says nothing about the measurement of whether a retrofit soot filters to function properly and the car still allowed to drive in the LEZ. "The AU we would not notice."
The testing organizations can not be blamed. You must abide by the legally established procedures. "Not" The measurement methods conform to the current state of technology, said Hans-Juergen Maeurer, head of development for testing the expert organization Dekra. The AU-measurement lags behind kind of engine development.
From the consumer perspective is not the current situation unacceptable, says Gerd Lottsiepen of Transport Club Germany (VCD), "Today, customers pay for something that does not work. It would have to come urgently a new trial. "Acknowledges that not a meaningful emissions inspection for customers will be more expensive. It must however be at least ensures that key technical systems work well in the car.
"If you make an environmental test, the test also measure it, is to measure what he" says Lottsiepen. After all, he has not given up hope that the legislature in the future but still grinds to a better measurement methods. Thus, there exists at least a first reflection, the framework of the AU to adapt accordingly.
For the exhaust emission test (AU) for passenger cars are basically the same terms as for the main study (HU). For new cars, according to the ADAC, the first test date after 36 months is due. All the following tests are then at the 24-month rhythm. Freed from the AU principle gasoline remain first registered before 1 July 1969 and diesel first registered before 1 January 1977. Even vehicles with red plates or temporary plates and of agricultural and forestry tractors, self-propelled machinery and trucks are excluded from the investigation.
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