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Volkswagen emissions violations : ウィキペディア英語版
Volkswagen emissions scandal


| label22 = 25 Nov 2015 | data22 = The German Federal Motor Transport Authority (KBA) approves VW fixes for 1.6 and 2.0 diesel engines in Europe.
}}
On 18 September 2015, the United States Environmental Protection Agency (EPA) issued a notice of violation of the Clean Air Act to German automaker Volkswagen Group, after it was found that the automaker had intentionally programmed turbocharged direct injection (TDI) diesel engines to activate certain emissions controls only during laboratory emissions testing. The programming caused the vehicles' nitrogen oxide () output to meet U.S. standards during regulatory testing, but produce up to 40 times higher output in real-world driving. An estimated eleven million cars worldwide, and 500,000 in the United States, produced between model years 2009 and 2015, included such programming.〔〔〔
These findings stemmed from a study on emissions discrepancies between European and U.S. models of vehicles commissioned in 2014 by the International Council on Clean Transportation (ICCT), summing up the data from three different sources on 15 vehicles. Among the research groups was a group of five scientists at West Virginia University, who detected additional emissions during live road tests on two out of three diesel cars. ICCT also purchased data from two other sources. They provided their findings to the California Air Resources Board (CARB) in May 2014.〔〔〔
Volkswagen became the target of regulatory investigations in multiple countries,〔
〕 and Volkswagen's stock price plunged in value by a third in the days immediately after the news. Volkswagen Group CEO Martin Winterkorn resigned, and the head of brand development Heinz-Jakob Neusser, Audi research and development head Ulrich Hackenberg, and Porsche research and development head Wolfgang Hatz were suspended. Volkswagen announced plans to spend US$7.3 billion on rectifying the emissions issues, and planned to refit the affected vehicles as part of a recall campaign. The scandal raised awareness over the higher levels of pollution being emitted by all vehicles built by a wide range of carmakers, which under real world driving conditions are prone to exceed legal emission limits. A study conducted by ICCT and ADAC showed biggest deviations from Volvo, Renault, Jeep, Hyundai, Citroën and Fiat.〔(NOX control technologies for Euro 6 Diesel passenger cars, Market penetration and experimental performance assessment ), Liuhanzi Yang, Vicente Franco, Alex Campestrini, John German, and Peter Mock. ICCT in collaboration with ADAC, 2015-09-03.〕 A discussion was sparked that software-controlled machinery will generally be prone to cheating, and a way out would be to make the software source code accessible to the public.〔(Volkswagen and Cheating Software ), Schneier on Security, 2015-09-30〕〔(VW's Cheating Proves We Must Open Up the Internet of Things ), Klint Finley, Wired, 2015-09-24.〕〔(Volkswagen's Diesel Fraud Makes Critic of Secret Code a Prophet ), NY Times on Eben Moglen, 2015-09-22.〕
== Background ==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Volkswagen emissions scandal」の詳細全文を読む



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