Volkswagen Group has detailed the technical fixes which will be used to bring two of its EA189 diesel engines into line with current emissions standards. The fixes, which are for the 1.6-litre and 2.0-litre diesel engines, have been presented to the KBA authority in Germany to be ratified before being offered to the public. Volkswagen says the fixes rectify emissions on "the majority" of vehicles affected by the ongoing emissions scandal. In a statement, Volkswagen says "after implementation of the technical measures, the vehicles will comply with the applicable emissions standards."
Detailing the measures which will be taken to remove the 'defeat device' software from its engines, Volkswagen revealed the following information.
EA189 1.6-litre diesel engine - VW says a new 'flow transformer', a mesh used to calm air flow around the air mass sensor, will be fitted. The sensor is used to measure air mass throughput, and helps to regulate the internal combustion process. In addition, a software update will be applied. In all, the fix should take less than one hour.
EA189 2.0-litre diesel engine - These engines will only receive a software update, which should take less than half an hour.
"Thanks to advances in engine development and improved simulation of currents inside complex air intake systems, in combination with software optimisation geared towards this, it has been possible to produce a relatively simple and customer-friendly measure," reads VW's statement.
"The objective for the development of the technical measures is still to achieve the applicable emission targets in each case without any adverse effects on the engine output, fuel consumption and performance. However, as all model variants first have to be measured, the achievement of these targets cannot yet be finally confirmed."
The technical solution for the 1.2-litre EA189 engine will be presented to the KBA at the end of this month, VW said. The company also said its sister brands, Audi, Seat, Skoda and VW Commerical Vehicles, were also planning their own corresponding measures to fix affected vehicles.
Jim Holder (Autocar UK)