Production of audi's first stand-alone electric model, the e-tron suv, will begin later this year using what the company claims is a carbon-neutral production process.. Subscribe now and save, give a gift subscription or get help with an existing subscription.. Motor trend reviews the 2017 audi rs 7 where consumers can find detailed information on specs, fuel economy, transmission and safety. 2017 audi rs 7 prices online.. A 10-unit special edition, with a ‘special’ price. 8s to our shores. ’s slightly more confusing than that, though in a surprisingly positive way.. We got a preview of it at the 2017 north american international auto show in the form of a concept, and a year on prototypes for audi's upcoming q8 have been spotted and they're wearing almost zero camouflage gear.. Future cars. nissan researches mind-over-motor technology - volkswagen i.d. 2019 mercedes-amg gt 4-door coupe first look. Bmw told the press in geneva this week that an i4 sedan based on the 4 series gt will go on sale by 2020, with a larger i5 sedan following a year later.. Bringing car buyers and enthusiasts the latest us and world auto news, industry trends, in-depth reviews, high-res images and live auto show coverage.. Auto nieuws - het laatste autonieuws uit meer dan 1000 online nieuwsbronnen bij auto headliner. Milton keynes launches first green-vehicle permit, giving electric cars free parking and right to use bus lanes soon. 15,000 parking spaces in the town now free to use for low-emissions cars. Audi r8 v10 neuburg edition’ oz arrival confirmed, A 10-unit special edition, ‘special’ price. ’ slightly confusing , surprisingly positive ..
Wolfsburg, 06 March 2007 - On its new Touareg Volkswagen is introducing one of the cleanest diesel engines in the world: The BlueTDI with SCR catalytic converter. This converter reduces nitrogen dioxide (NOx) emissions by up to 90 percent. The Volkswagen Touareg BlueTDI, that delivers 165 kW / 225 PS, meets even the most challenging exhaust emissions standards. Currently, the lowest limits are set in the US states California, Massachusetts, New York, Vermont and Maine: In the “Tier2 Bin5” standard. The Touareg BlueTDI being presented in Geneva is one of the first vehicles with a diesel engine that can clear this hurdle too. Especially in the USA, economical turbo-diesels like the V6 BlueTDI can contribute, more than any other current powertrain technology, toward reducing oil consumption and the generation of climate-impacting greenhouse gases. Therefore, Volkswagen will be offering the Touareg with SCR catalytic converter starting in 2008, initially in the USA, as part of the BlueTec Alliance started together with Audi and DaimlerChrysler at the end of last year. Also slated for 2008: The company for smaller vehicles like the Volkswagen Jetta will introduce, in America, a NOx storage catalytic converter that eliminates up to 90 percent of nitrogen oxides.
The two technically challenging systems are scheduled to debut in Europe a short time later. The Euro-4 standard currently specifies a NOx limit of 0.25 g/km here. The US standard, which the Volkswagen Touareg BlueTDI satisfies, specifies among other things a NOx limit of 0.043 g/km (0.07 g/mile). SCR is the usual international acronym for "Selective Catalytic Reduction". Its purpose is to selectively convert the nitrogen oxide (NOx) exhaust components to nitrogen and water without generating any undesirable side products. It was developed precisely for this highly specialized task. Therefore, in the future vehicles such as the Volkswagen Touareg BlueTDI, being shown for the first time in Geneva, will also be equipped with an oxidation catalytic converter and a diesel particulate filter. The nitrogen oxides are converted utilizing a synthetically produced, water-based urea solution, e.g. AdBlue, which is stored in an auxiliary tank on the Volkswagen Touareg BlueTDI. The substance, consisting of 32.5 percent urea, is continuously sprayed into the exhaust stream before the SCR catalytic converter. It is metered based on the mass flow of the exhaust. Engine management ensures precise regulation, based on information from a NOx sensor located after the SCR catalytic converter.
Atomized into a fine spray by a screen, the urea is transformed in the hot exhaust gas stream upstream of the catalytic converter. In the SCR catalytic converter this reacts with the nitrogen oxides and splits them, as described, into nitrogen and water. The water-based additive AdBlue is non-toxic, odorless and biodegradable. AdBlue is consumed at an average rate of about 0.1 liter per 100 kilometers. Consumption and tank size are sized so that the AdBlue supply does not need to be replenished until the next scheduled service. Besides introducing the SCR catalytic converter, the engineers at Volkswagen Automotive Group have put together an entire bundle of innovative modifications. Combustion chamber sensors are being implemented for the first time; they monitor pressure conditions in the cylinders. And a new common rail system with 2,000 bar injection pressure atomizes the fuel even finer. The ideal combustion achieved by these measures enhances smooth engine running and lowers overall raw emissions. In the effort to reduce emissions, especially NOx raw emissions, efforts being made in internal engine modifications include measures to lower maximum temperatures in the combustion chambers and to reduce oxygen concentration by exhaust gas recirculation.
