Jetta Tdi Catalytic

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Jetta Tdi Catalytic
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Most people are aware that motor vehicles produce toxic emissions which are bad for the environment. However less people are aware that the amount of emissions produced vary, dependant on the car make and model. The toxic emissions produced by motor vehicles are predominately made up of carbon dioxide and nitrogen oxide, which contribute to air pollution. These toxins are released as a result of the engine burning fuel. Therefore the amount of these toxins produced by a car is directly related to the amount of fuel it consumes.

The good news is that those cars which produce fewer emissions do so because they use less fuel and are therefore also cheaper to run. So choosing a car which is more fuel efficient will not only help the environment but also your bank balance. But it is not just fuel efficiency which impacts on the amount of fuel a car will use in the course of a journey, other factors also play a part. The weight of your car is one such factor. Heavier cars will use more fuel to complete the same journey than lighter cars. If you need a larger, heavier car then consider the amount of things you pack into it on a daily basis. Remove items you don't need for the journey you are taking so that you are only carrying the items that you need. It is important to note that the weight of a car has more bearing on the amount of fuel that it consumes than the engine size of the vehicle.

The type of fuel that your car uses will also impact on the amount of toxic emissions that it produces. Petrol cars for example use more fuel than those which run on diesel and therefore produce around ten percent more carbon dioxide. Cars which run off LPG fuel give out less toxic emissions that Diesel and pre Euro IV petrol engines, but overall their fuel consumption is worse. Diesel cars tend to have the best fuel economy but can be more expensive to buy which can dissuade some motorists. Advances in modern technology over the years mean that newer cars are able to filter toxic emissions better. Nowadays there are stringent tests in place to ensure that the exhaust emissions of new cars meet agreed European standards. These standards first came into play in the 1990's with the introduction of the Euro 1 standard. Euro 1 made it compulsory for all new petrol cars to be fitted with a catalytic converter, which is a device that reduces the toxicity of the emissions released into the environment. A car which has not been fitted with a catalytic converter gives out the same amount of toxic emissions as around 20 of today's modern cars fitted with the device. Since then the European standards have been getting tougher and tougher with the Euro V standards coming into place in 2009 and demanding more from car manufacturers than ever before. The best way however to reduce toxic emissions from your car is to drive it less. Not only will driving less help the environment but it could also reduce your motor insurance premiums and other motor costs.

Rochelle Martinez, Freelance Web Content Article Writer for three years. Some of her articles are about http://www.quinn-direct.com.

Vw’s Cleanest Tdi Engine Meeting Strict Tier 2/bin 5 Standards

Volkswagen’s Turbocharged Direct Injection (TDI) is said to be the leader in diesel revolution. TDI engine makes use of the Pumpe Düse system which makes it incredibly efficient. Pumpe Düse which means ‘pump injector’ have solved the problem of lost pressure through fuel pipes. The injector and pump are integrated in a single Pumpe Düse unit. Each of the cylinders has its own Pumpe Düse unit placed on the cylinder head and operated by the camshaft, injecting fuel directly into the combustion chamber at pressures ranging up to 30,000psi.

The high pressures produce is perfect for efficiently blending of the fuel/air mix, controlling fuel quantities and injection timings. Such clever technology enables TDI to offer the benefits it’s famous for such as: good fuel economy, reduced exhaust emissions, and increased performance with more torque than the traditional injection systems.

Volkswagen didn’t stop with the TDI technology; it has continuously developed and improved it until it has finally come up with the cleanest ever TDI engine. Initial test drives of the high potential Volkswagen technologies demonstrate a remarkable reduction in the emission of nitrogen oxide.

VW’s Jetta with a new 2.0 Liter common rail diesel engine with a nitrogen oxide reservoir catalytic converter which complies to the Californian emission standard ‘Tier 2/Bin 5’ was used during the test. The Tier2/Bin 5 are considered to have the strictest requirements worldwide. The first production run of the ‘Clean TDI’ with nitrogen oxide post treatment will be made by 2008 in the US.

The main objective of the entire ‘Clean TDI’ concept is to reduce nitrogen oxide. Volkswagen’s engineers in Wolfsburg reached this goal through the internal development of the engine and the use of new emission post-treatment technology giving them a result of up to 90% less nitrogen oxide emissions (NOx).

This result was necessary to comply with the Tier 2/Bin 5 norm which applies to California and four other states in the north-east of America namely Massachusetts, New York, Vermont and Maine. The average Nox emissions allowed is 70 mg per mile and in order to comply with the said standard Volkswagen has developed an entirely new emission treatment technology.

Volkswagen has developed two new systems connected to the oxidation catalytic converter and the particle filter in the exhaust system. At present new NOx reservoir catalytic converter technology is being tested for models below the Passat class. Nitrogen oxide is effectively absorbed like sponge which leads to a high level of efficiency. In terms of the particle filter, the system has a self-cleaning system. How? The engine management system changes operation modes for a few seconds.

For larger and heavier vehicles a Selective Catalytic Reduction (SCR) catalytic converter is employed. The central element of the SCR is an aqueous solution such as the AdBlue which is transported in an additional tank made from stainless steel or plastic. The solution contains 32.5% urea which is continuously injected into the exhaust system in front of the SCR catalytic converter using a metering valve.

AdBlue solution is a non-toxic, odorless and biodegradable. Volkswagen intends to install the additional tank so that the car can be driven without needing maintenance between services. VW is the diesel pioneer in the US and approximately more than 800,000 diesel cars from Volkswagen have already been sold.

About the Author

Joe Thompson is the owner of a successful auto body shop in Ferndale, California. This 38 year old is also a prolific writer, contributing automotive related articles to various publications.

Driving Down the Road: Volkswagen Jetta SportWagen TDI
First, a definition: Cult car: a non-mainstream vehicle supported by a small but rabidly fanatic group of owners who would never even think of buying anything except the new version when theirs finally gives up the ghost.

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