jm + diesel   3

How they did it: an analysis of emissions defeat devices in modern automobiles
Using CurveDiff, the team analysed 963 firmware images, for which analysis completed successfully for 924. 406 of the analysed images contained a defeat device, out of which 333 contained at least one active profile. In at least 268 images, the test detection affects the EGR. Firmware images released on Dec 3rd 2014 are used in VW Passat cars, and include the refinement to the defeat device to detect steering wheel angle that we discussed previously.
cars  driving  emissions  diesel  volkswagen  law  regulation  firmware  reverse-engineering 
june 2017 by jm
EPA opposed rules that would have exposed VW's cheating
[...] Two months ago, the EPA opposed some proposed measures that would help potentially expose subversive code like the so-called “defeat device” software VW allegedly used by allowing consumers and researchers to legally reverse-engineer the code used in vehicles. EPA opposed this, ironically, because the agency felt that allowing people to examine the software code in vehicles would potentially allow car owners to alter the software in ways that would produce more emissions in violation of the Clean Air Act. The issue involves the 1998 Digital Millennium Copyright Act (DCMA), which prohibits anyone from working around “technological protection measures” that limit access to copyrighted works. The Library of Congress, which oversees copyrights, can issue exemptions to those prohibitions that would make it legal, for example, for researchers to examine the code to uncover security vulnerabilities.
dmca  volkswagen  vw  law  code  open-source  air-quality  diesel  cheating  regulation  us-politics 
september 2015 by jm
How VW tricked the EPA's emissions testing system
In July 2015, CARB did some follow up testing and again the cars failed—the scrubber technology was present, but off most of the time. How this happened is pretty neat. Michigan’s Stefanopolou says computer sensors monitored the steering column. Under normal driving conditions, the column oscillates as the driver negotiates turns. But during emissions testing, the wheels of the car move, but the steering wheel doesn’t. That seems to have have been the signal for the “defeat device” to turn the catalytic scrubber up to full power, allowing the car to pass the test. Stefanopolou believes the emissions testing trick that VW used probably isn’t widespread in the automotive industry. Carmakers just don’t have many diesels on the road. And now that number may go down even more.


Depressing stuff -- but at least they think VW's fraud wasn't widespread.
fraud  volkswagen  vw  diesel  emissions  air-quality  epa  carb  catalytic-converters  testing 
september 2015 by jm

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