After uncover the scandal Dieselgate of Volkswagen, the KBA German start an investigation to determine if other car manufacturers had employed a software such as the Volkswagen to distort the polluting emissions of their cars to diesel. The studies have been completed and it has been detected that many manufacturers exceed the limits of emissions of NOx, but that no other manufacturer, in addition to the Volkswagen Group, has made traps.
Audi, Mercedes, Opel, Porsche and Volkswagen have reported that will calls to review voluntary to more than 630,000 cars together in Germany. The objective of these campaigns will be to carry out small modifications in the software of the engine to to reduce NOx emissions. It has been found that by technical requirements, some systems anti-pollution do not work properly in all conditions. These marks are not the only ones affected, but they do have confirmed campaigns volunteer of the 16 involved.
Renault is the only one of the 16 brands that exceed the limits of NOx under certain operating conditions
excess emissions of NOx detected is mainly due to the ambient temperature. The study of the KBA has been detected as when the temperature drops below a certain point, some systems anti-pollution stop working to safeguard the durability of the mechanics. In the case of Mercedes, with an ambient temperature lower than 10 degrees celsius, do not act the treatment system of exhaust gas, while if we talk about Opel, raise the temperature to the 17th C. As the tests are performed between 20 and 24 ° C, in circumstances of approval in the laboratory the system is working properly.
All the manufacturers involved in this call to review and own KBA clarify that this is not a software that has the direct intention to deceive, as is the case of Volkswagen, but that it is of peculiarities of the functioning of each of the systems. Alfa Romeo, Chevrolet, Dacia, Fiat, Ford, Hyundai, Jaguar, Jeep, Land Rover, Nissan, Renault, and Suzuki are the brands that have also shown emissions NOx excessive on the evidence of the KBA.
exhaust systems SCR with injection of AdBlue are the most effective against NOx
at the moment in Germany the cars affected by the call to review are the following: Audi Q5 (22.000); Audi A6 (29.000); Audi A8 (15.000); Opel Zafira (58.000); Opel Insignia (31.000); Opel Cabrio (1.000); Mercedes A-Class and B (211.000); Mercedes V-Class (36.000); Porsche Macan (32.000); Volkswagen Amarok (70.000); Volkswagen Crafter (124.000).
Audi will act on the engine 3.0 TDI V6. Opel will begin in June, calls volunteers for their models Euro 6 which is used SCR technology for injection of AdBlue ® in the exhaust. Mercedes, for its part, will modify the software of the Mercedes A-Class and B-Class in diesel engine 1.5 source Renault, as well as the vans Mercedes V-Class 250 d.
Source – Coach