A defeat device is an AECD “that reduces the effectiveness of the emission control system under conditions which may reasonably be expected to be encountered in normal vehicle operation and use. We will update with new information as it … Jason Fenske, host of Engineering Explained, breaks it all down, and in the simplest ways, shows how VW was able to fool regulatory bodies for so long.Â. How did it know this? In 2015, campaigners revealed that cars produced by Volkswagen emitted far more nitrogen oxides in standard road driving than was recorded in test conditions. How did the ‘defeat device… The preliminary finding in the UK case casts a fresh light on the activities of Volkswagen. Volkswagen Admits Vehicles Contain Defeat Device Volkswagen largely acknowledged that errors were made in respect to its 2.0 liter diesel vehicles. By Volkswagen breached the law by installing so-called 'defeat devices' in its cars to cheat emission tests and cannot argue the software was installed to merely protect car engines, a … From there, it enters the exhaust manifold and it can route one of two ways: a high-pressure exhaust gas recirculation or to the exhaust turbine. Volkswagen is now likely to continue to a full trial of liability for the claims of deceit. 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In September, the Environmental Protection Agency (EPA) found that many VW cars being sold in America had a "defeat device" - or software - in … With more fuel available, efficiency also increased, but NOx levels did as well. The car manufacturer Volkswagen subverted key air pollution tests, a British court has found, by using special software to reduce emissions of nitrogen oxides under test conditions. A low-pressure EGR can route exhaust back to intake, but if it doesn't, the byproduct heads to a nitrogen-oxide trap, and finally a hydrogen sulfide to sulfur dioxide converter. All Rights Reserved. But, how exactly did VW's "defeat device" work? Volkswagen loses top EU court case in diesel scandal By SAMUEL PETREQUIN 22 minutes ago BRUSSELS (AP) — The European Union’s top court ruled on Thursday that Volkswagen breached the law by installing on its cars a so-called defeat device to cheat on emission tests and cannot argue it was merely protecting car engines. This Is How Volkswagen’s Defeat Device Worked In Its Diesels. The defeat device allowed VW to trumpet falsely its environmental commitment to ecologically committed drivers: on advertisement showed “green police” allow a VW … But their emissions of tiny particles and irritant gases such as nitrogen dioxide are far higher, unless trapped by filters. I agree to receive emails from Motor Authority. In his summary, the judge wrote: “[After considering the arguments made by Volkswagen] the upshot was that I found that the software function in the vehicles here did indeed amount to a prohibited ‘defeat device’… I also concluded that VW’s attempt to relitigate the issue here was an abuse of the process.”, He said: “A software function which enables a vehicle to pass the test because (artificially) it operates the vehicle in a way which is bound to pass the test and in which it does not operate on the road is a fundamental subversion of the test … it destroys the utility of the test.”. 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