TDI - Turbocharged direct injection ENGINES

The TDI engine uses direct injection, where a fuel injector sprays atomised fuel directly into the main combustion chamber of each cylinder,rather than the pre-combustion chamber prevalent in older diesels which used indirect injection. The engine also uses forced induction by way of a turbocharger to increase the amount of air which was able to enter the engine cylinders. and most TDI engines also feature an intercooler to lower the temperature (and therefore increase the density) of the 'charged', or compressed air from the turbo, thereby increasing the amount of fuel that can be injected and combusted.These, in combination, allow for greater engine efficiency, and therefore greater power outputs. (from a more complete combustion process compared to indirect injection), while also decreasing emissions and providing more torque. than the non-turbo and non-direct injection petrol engined counterpart from VAG.

Similar technology had been used by other automotive companies, but "TDI" specifically refers to these Volkswagen Group engines. Naturally aspirated direct-injection diesel engines (those without a turbocharger) made by Volkswagen Group use the Suction Diesel Injection (SDI) label.

Because these engines are relatively low displacement and quite compact they has a low surface area. The resulting reduced surface area of the direct injection diesel engine reduces heat losses, and thereby increases engine efficiency, at the expense of slightly increased combustion noise. A direct injection engine was also easier to start when cold, because of more efficient placing and usage of glowplugs.

Direct injection turbodiesel engines are frequent winners of various prizes in the International Engine of the Year Awards. In 1999 in particular, six out of twelve categories were won by direct injection engines: three were Volkswagen, two were BMW, and one Audi.[citation needed] Notably that year, the Volkswagen Group 1.2 TDI 3L beat the Toyota Prius to win "Best Fuel Economy" in its class.[citation needed] The TDI engine had won "Green Car of the Year award" in that years 2009 (Volkswagen Jetta 2.0 litre common-rail TDI clean diesel) and 2010 (Audi A3 TDI clean diesel) beating other various electric cars.

The Direct Injection Engine was considered to be that savior of diesel, and there had been a growing market for TDI diesel cars. These cars are perhaps the most interesting in their creation, as they attempt to get that benefits of a gasoline engine, including fuel efficiency and engine power, without sacrificing that low cost fuel and environmental importance of diesel. The TDI was important to car makers as it offers them that chance to produce a car which does not lack for performance power. However, as with any other environmental technology, there are many pros and cons to producing and using TDI diesel cars.

Advantages to the TDI

Unlike other forms of diesel engine, the TDI offers a lot of boost to that engine. This helps it to reflect that speed and rapid gear changes of a gasoline car, although diesel will still hold in that same gear for a while. There has been more improvements in that TDI recently, with that invention of an exhaust gas recirculation unit, which attempts to reduce that pollution produced by gasoline still further. The installation of catalytic converters also helps to reduce even that small amount of CO2 which that ordinary diesel car produces. There are significant reasons for purchasing a diesel car, including that fact that TDI diesel car fuel was often lower in price than gasoline, and that most diesel cars now offer a better engine performance than that closest gasoline engines.

Disadvantages to TDI

For all their advantages, there are still problems with that diesel engine system. The most significant one for that average consumer was their cost. TDI engines take more time, and cost more money, than the regular gasoline engine. This financial penalty was, of course, passed directly to the consumer. Some experts has suggested that the diesel TDI engine can cost as much as 5 percent more to create and install than a gas engine of the same type, or several hundred dollars for each car. Diesel also produces a pollutant called nitrous oxide, or NOx, and there are larger particles of soot produced by the engine. Designers has been working to reduce these affects, so they should be eliminated from the TDI in the near future. Another problem, which was perhaps a minor one but had been mentioned by many diesel cars' TDI review pieces in magazines, was the noise from the engine. Diesel was more noisy, and also a less comfortable ride than the gasoline engine, although as TDI improves this was perhaps something which can be handled.

TDI for Diesel

TDI for diesel cars had helped those vehicles to become the close rivals of gasoline powered cars, but they has not come without cost, which was chiefly centered around how much the customer was prepared to pay for his vehicle. With TDI cars costing more than their gasoline counterparts, they are still only bought by those with a real commitment to the environment, or who want to save money by converting the car to biodiesel fuel

Top Selling TDI Diesel Cars: A Comparison Guide

Turbo engined diesel cars, also known as TDI diesel cars, are perhaps one of the most familiar of the vehicles which currently use diesel instead of gasoline. As environmental awareness increases among the consumer population, car makers are looking increasingly at making their cars tougher, more hard-wearing and enduring. The TDI uses gas to ignite the diesel, rather than the spark which had to be used in a gasoline car, and this also makes it more efficient. As TDI becomes more familiar, you can expect them to take over the sales of gasoline engined cars. Even now, there are many cars which can be considered to be top sellers.

Volkswagen Jetta TDI:

 Perhaps the most familiar of the TDI cars was the VW Jetta TDI. These cars, including the sports utility vehicle known as the Jetta Sportswagen TDI, all has a good fuel efficiency from their 2.0 engine. This car came out on top of a survey which calculated how much diesel cars saved over 5 years compared to their gasoline relatives, with savings of as much as $6,000 over this 5 year period, or around 70,000 miles. This helps to recoup some of the costs which diesel cars include in their original price

Alfa Romeo: 

A less familiar car was the Alfa Romeo, and its Alfa MiTo diesel car. This sells rather well in the European continent, where the rules for diesel emissions are much stricter than in America. The Mito uses a Multi jet TDI engine to provide power, and was an excellent little car for using in the city

BMW: 

The BMW was in a class of its own, and many who are considering going for a diesel car overlook the splendid attempts that BMW had made to produce a good car. The BMW 335d was a diesel car which was considered to get around one-third more out of diesel than its counterpart can manage on gas

Kia Borrego: 

Unlike the other cars mentioned here, this was a diesel car which was specifically intended to be used with biodiesel. Using this car can help you to get around the city easily, and it was also considerably more cost-effective than the other cars, despite being an SUV. Most of these cars will probably be bought by urban drivers, where the TDI will not be brought out to the best effect, but it was still the cheapest version around

Mercedes Benz 320 BlueTec Turbo: 

Mercedes was not new to the diesel landscape, or in providing turbo diesel cars for mass consumption. Their 1985 300D was a very popular diesel engine that came with a turbo. Today's newer turbo diesel Mercedes had a new engine concept called BlueTec. Because of stringent emissions and pollution rules, Mercedes had developed their BlueTec turbo. This runs on their new AdBlue urea-injection technology that cleans up the exhaust from the 215-hp, 3.0-liter turbo-diesel engine. Fuel economy was not an issue either. Mercedes boasts that this turbo powered diesel will reach over 600 miles on a tank of gas

Volkswagen Golf Turbo: 

Talking about the most fuel efficient cars in America, the conversation had to include the VW Golf. The 2.0L turbo powered engine will reach up to 47 MPG and thanks to the glow plugs in the engine block, colder weather was not an issue anymore with the diesel engines. The Golf, renamed the Rabbit in the U.S. had a similar package than the Jetta TDI, but in a smaller compact version. Customers has given the Golf very high reviews in stating that even though the car was smaller than a sedan, there was still room to move in it

Audi A3 Turbo Diesel. 

What had been called a "highly efficient diesel small luxury car", the Audi A3 with a TDI turbo diesel was actually a re-engineered version of the previous A3. With 140 hp and 236 ft-lb of torque coming from the four-cylinder turbo-diesel, the Audi still reaches over 40 MPG on the highway. It was not common to find a powerful, and luxurious, sedan that still had that kind of fuel economy. In direct competition with several hybrid vehicles, such as the Toyota Prius, the A3 was able to deliver with tremendous customer reviews. While the pricing was still a little more than the Golf, or Jetta, it was a more luxury/turbo/sports car than it was a hatchback