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Diesel particulate filter of a school bus A diesel particulate filter (top left) in a Peugeot Off-road – DPF installation. A diesel particulate filter (DPF) is a device designed to remove diesel particulate matter [broken anchor] or soot from the exhaust gas of a diesel engine. [1] [2]
Catalytic converters remove only 20–40% of PM so particulates are cleaned up by a soot trap or diesel particulate filter (DPF). In the U.S., all on-road light, medium, and heavy-duty diesel-powered vehicles built after 1 January 2007, are subject to diesel particulate emission limits, and so are equipped with a 2-way catalytic converter and a ...
The complaint, seeking up to $46 billion in penalties for Clean Air Act violations, [298] alleged that Volkswagen equipped certain 2.0 and 3.0-litre diesel-engine vehicles with emissions cheating software, causing NO x pollution to exceed EPA's standards during normal driving conditions. It further claimed that Volkswagen entities provided ...
In 2007, the United States Environmental Protection Agency (EPA) enacted requirements to significantly reduce harmful exhaust emissions. To achieve this standard, Cummins and other diesel engine manufacturers developed an aftertreatment system that includes the use of a diesel particulate filter (DPF). As the DPF does not function with low ...
Ford Motor is recalling 295,449 diesel-engine trucks because a defective fuel pump could cause a loss of power, raising the risk of a crash, the National Highway Traffic Safety Administration said ...
Motor vehicles with a model year older than 1981 are exempt from testing, according to the department. This fall, DEQ plans to petition the EPA to remove the emissions testing requirement.
This, in turn, necessitates periodic active regeneration of the DPF by burning diesel fuel directly in the oxidation catalyst in order to significantly increase exhaust-gas temperatures through the DPF to the point where PM is incinerated by the residual oxygen in the exhaust. Because diesel fuel and engine oil both contain nonburnable (i.e ...
The statutory NO x limit for diesel passenger cars Euro 5 is 180 mg NO x /km. The Porsche Panamera equipped with the VW-EA897 engine, made by Audi, exhibited an 8.3-fold limit violation with an average NO x emissions of 1,498 mg/km, according to DUH. According to DUH data, the measurements were made at outside temperatures between +10 and +14 °C.