A detailed history of the failure of the Volkswagen Group with forgery tests on environmental exhaust

What happened h4> The exhaust of cars with two-liter diesel engines of Volkswagen was in the tens of times less environmentally friendly than it was stated on the test results. Computer car deliberately changes the mode of the engine so that the tests were obtained good results in exhaust.

Why h4> Management of Volkswagen went to forgery, because they really wanted to continue to support the company's reputation as a manufacturer of highly efficient diesel engines.

Modern cars in the exhaust system has a component called NOx trap (which we referred to as "catalyst"). Its function - to reduce nitrogen oxide and other harmful substances in the exhaust of a vehicle with an internal combustion engine.

Unfortunately, NOx trap operation scheme is that its efficiency increases with increasing the content of unburned fuel in the exhaust. And the increase of this level is the opposite problem of increasing the efficiency of the engine.

Therefore, the management company can not ensure that the two diametrically opposite problems, пошло forgery . In a modern car there is a large number of sensors that collect a variety of information about the different units of the automobile. Therefore, it is not difficult, the data collected from the sensors to determine with high accuracy the condition and operation of the vehicle (for example, open the hood; antiprotivobuksovochnaya off the system, etc.).

Experts have found that among the parameters were read position of the steering wheel, vehicle speed, engine run time, and the atmospheric pressure.

On-board computer that is responsible for the work of the main systems, according to some set parameters determined that the vehicle is in test mode, ecology, and in that moment changed the scheme of work of the engine so that it burns less fuel - but unburned part provides the most efficient job NOx trap.

In this way, we managed to successfully deceiving tests, release of at least 11 million vehicles of the Volkswagen and Audi. Two-liter diesel engines produced since 2009 and installed on the brand of cars Jetta, Jetta SportWagen, Golf, new Golf SportWagen, Passat and Beetle, as well as the Audi A3.

How to detect h4> Arvind Tiruvengadam [Arvind Thiruvengadam], an assistant professor at the University of West Virginia, last year занимался checking the exhaust of diesel vehicles manufactured in Europe and destined for the US market. They tested the machine is not in the stands and on real roads. It was completed several thousand kilometers by cars Volkswagen Jetta, Passat and BMW X5.



Set for testing the exhaust in the real world i>

According to expectations, Passat had to show a minimum level of nitric oxide in the exhaust, but in the end показал Range 20 times, than the maximum selected by researchers.

It was found that in a very economical and not very eco-friendly mode of operation of the engine the level of nitric oxide in the exhaust up to 40 times higher than the permissible European standards.

Who is to blame h4> The head of Volkswagen has already resigned, but he claims that he knew nothing about such a forgery. Experts say that in the company of such a level & quot; все passages written & quot ;, and guidance on the development and implementation of such a system is theoretically possible to trace.

Who else h4> But the scandal still continues to flare - Today it was announced that the head of development at Audi and the chief engineer of engines Porsche также to dismiss . These were the two main people working on brands also belong to the concern Volkswagen. Meanwhile, German newspaper Bild published a study Auto, according to which, and the car BMW X3 with a 2.0 liter diesel engine nitrogen oxide in the exhaust actually exceeds European standards 11 times. While BMW denies the charges and his defense alleges that the newspaper did not provide any details about the manner in which conducted the tests referred to in the article.

What h4> In the US, the number of diesel cars is not more than 1% of all sold, but their number is slowly growing. Now, however, this growth may be replaced by a fall. A car owners will likely have to face the fact that the next update of the software, the head of operation of the engine, their car becomes less economical and more environmentally friendly.

Meanwhile, the management of the Volkswagen Group has postponed a separate drawer $ 7, $ 3 billion to cover the costs associated with the scandal. True, it may not be all of her expenses. For every car sold with defective c 2008, the company will have to pay the US $ 37 thousand. The total amount of the fine will be about $ 18 billion.

Fortunately for us, доля VW in the US was a little - for many years, trying to understand how to extend its expansion into the US market, but all attempts were unsuccessful. It is possible that such a scandal could undermine the position of VW in the European market and lead to mass layoffs, which had a negative impact on the German economy.

Source: geektimes.ru/post/263012/