Some people think that by overfeeding the engine with diesel or by removing the particulate filter they will actually win, but they definitely do not think about the lungs in question, that is, the lungs of passers-by. Smoking cars (perhaps apart from racing cars) have simply gone out of fashion in the Czech Republic, and to most people such drivers are actually laughable.

Photo: Service center for road transport

Smoking cars can attract the attention of the police, who can order mobile emission measurements.

However, if the “smoker” in question is selected by the police as part of random measurements of emissions by mobile stations, there will probably be no reason to smile. An ineligible vehicle (passenger, truck, bus or even a tourist train) may lose its technical license on the spot, so it is towed home. How does such a measurement take place? This was revealed to us by Tomáš Grof from the Service Center for Road Transport.

Mobile emission measurement, which is de facto the same as at a technical inspection station, is one of the parts of the technical road inspection. The procedure is as follows.

Photo: Service center for road transport

Mobile emissions measurement is de facto the same as MOT.

“Just as the vehicle driver is present during the regular technical inspection of the vehicle at the technical inspection station, mobile emissions measurement is also carried out in the presence of the driver. Emissions are measured by a control technician in accordance with the methodological procedure of the Ministry of Transport of the Czech Republic and at the same time in such a way that the driver is not delayed unnecessarily,” explains Grof.

“First, the vehicle is identified and visually inspected. This is followed by a diagnosis of the engine, and if no fault is detected that would threaten the safety of the inspection technician, the driver, other road users, or even lead to damage to the engine, the measurement itself is carried out,” adds the specialist.

Photo: Service center for road transport

Not only cars and light commercial vehicles are measured, but also buses, trucks and other vehicles. However, emissions are not measured for motorbikes, not even on MOT.

For the sake of completeness, we would like to add that the measurement of emissions with a mobile device can be carried out under reasonable weather conditions, while temperature and humidity also play a role.

The priority of the application of pollutant limits is determined on the tailpipe and verified according to documents, values ​​from the label, the database of technical data, i.e. according to the general limits established by law. For gasoline engines, the concentration of harmful components is measured, and for diesel engines, the smokiness is measured, and at the end of the measurement, the driver receives a certificate from the police.

Photo: Service center for road transport

The technician will also go through the car, where he can find other defects or unapproved parts.

The measurement itself is carried out by employees of the mobile expert units of the Service Center for Road Transport, who hold a professional inspection technician certificate. However, the police officer informs the driver about the performance of the action. Measuring devices are approved and metrologically verified. Specifically, it is the AVL DiTEST GAS 1000 analyzer and the AVL DiSmoke 480 smoke detector.

Now you are probably wondering where you can find mobile emissions measurement? Highways, districts? Village or backwoods? All answers are correct, they are measured everywhere. Well, yes, but what must happen for a car or other vehicle to fail the test?

Examples of defects when emissions measurement is not carried out or is terminated prematurely:

  • the vehicle is not equipped with any identifier (non-existent or illegible VIN and at the same time non-existent or illegible production plate)
  • it is not possible to identify the type of engine installed in the vehicle
  • the fuel system must be tight, any fuel leaks are inadmissible
  • leaky or incomplete exhaust system (missing catalysts, DPF, EGR and other components and systems for reducing pollutant emissions), visible damage, fixing lambda probes, sealing flanges and joints, fixing heat shields and obvious inadmissible modifications
  • obviously disturbed electrical installation, cable bundles must not be punctured, all wires must be insulated, connectors must not be obviously damaged or loose

The technician then evaluates these defects, either as serious, when you only have a technical warranty for 30 days, or as dangerous, when your technical warranty ends immediately and you can call a tow truck.

And a car with a gutted particulate filter or overfed with diesel is just an example of a situation where the vehicle is technically unfit for operation and must not be used in traffic. However, it doesn’t end there. Whoever did wrong deserves punishment. And it is awarded by the police. In addition, you can win a fine of up to 2,500 CZK in addition to a limited or forfeited TK. And it pays off…

And it doesn’t end with just emissions, as the technician present can look at other parts of the vehicle, where he can detect other missing parts, unapproved wheels or accessories or obviously damaged bodywork due to corrosion. In short, it’s not just about emissions measurement, although we focused on it in the article, but about the overall technical inspection of the vehicle. All this while in operation and anywhere in the Czech Republic.