The manipulation of diesel engines in the Volkswagen Group were apparently more extensive than previously known, according to a media report. They were therefore even stronger than the US authorities determined already. VW did the manipulation software revision in diesel vehicles, as the California Environmental Protection Agency Carb had the group for months due to significantly increased exhaust gas values in their sights, the NDR reported, citing joint research with WDR and “Süddeutsche Zeitung”.
VW developers appeared to have the illegal breaking device extended nor turn of the year 2014/15 unnoticed by the US authorities by a software update, reported the research group. The motor control could therefore henceforth distinguish more clearly, whether the car has been tested on a test stand or driving down the road.The reason according to the report was apparently that had been assumed in VW that the vehicles had been too frequently incorrectly in the clean test mode also for normal road use. This resulted in a higher wear on the diesel particulate filter.
According to a VW internal document had until November 2014, the particulate filter by 6700 diesel cars in the US and Canada failed. Volkswagen expected therefore still nearly 50,000 more such damage.
Detection refined
Several computer science experts who examined at the request of the NDR, the control software of the investigated US version of the VW Passat before and after the update. They had come to the conclusion that in the new version, the feature of the steering angle detection has been added. “As part of the update, the software has been refined so that it can detect more accurately, whether it is in a test situation or not,” quoted the NDR Thorsten Holz, Professor of System Security at the Ruhr-Universität Bochum.
“It was deliberately another program code added” so that the car no longer incorrectly ride in the clean test mode, the Hamburger hacker Felix Domke
said the research group. the California environmental Protection agency had Volkswagen invited in early summer 2014 in to explain road use excessive measured exhaust emissions in diesel vehicles. VW had Carb according to the report then in December 2014, a voluntary recall of the affected vehicles offered to reduce by a software update nitrogen oxide emissions in road maintenance.
From December 2014 to have the more than 500,000 affected vehicles recalled in the workshops. With 280,000 cars the software update is to VW, were in fact made by the spring of 2015, reported the NDR.
Authority intensified checks
follow-up studies of carb experts in May 2015 showed therefore true that the nitrogen oxide emissions have been reduced in road maintenance by other measures within the software updates. Since the limits are, however, still exceeded by fifteen times, the authorities got their test stepped up and discovered by its own account, that in response to steering wheel movement, speed, driving time and air pressure, the extent of emission control changed and the cars the test situation recognized.
the extension of the software to detect the steering angle have thus possibly decisively helped Carb illegal disconnection device finally discovered, concluded the NDR.
In the car industry but therefore also considered possible that it had gone in the expansion of the software it, from legal reasons to improve the recognition of the dynamometer.
Volkswagen wanted According NDR, referring to ongoing internal and external investigations not comment on the report.
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