The TDI engines - what is it? Features, feature

More recently, diesel engines were used only in commercial vehicles. Such motors in the passenger car – a real rarity for Russian motorists. Previously, foreign manufacturers (including VAG) officially did not put these motors in the domestic market. But now began to appear in cars and crossovers from «Volkswagen» with the TDI engine. What is it? Consider our article.

Characteristics

First, note that motors with this abbreviation are not only «Volkswagen». These units have the “Audi”. The TDI engines – engines with turbocharged diesel injection (hence the abbreviation). Also, these units are characterized by direct fuel supply "common rail".

Features

Main feature – is the turbine, which is equipped with a TDI engine. What is it? This is the mechanism that provides forced air flow, thereby increasing torque and engine power. But unlike other engines, the 2.0 TDI has a special design of the turbine – with variable geometry. How is it different from normal compressors? This design allows you to adjust the magnitude and direction of flow of the exhaust gas. This provides a significant increase in power and high fuel efficiency. So, two liters of volume you can get up to 170 horsepower capacity. And thanks to the direct injection, the fuel consumption is around 5.5 liters in the combined cycle.

Some of the TDI engines in «Volkswagen» equipped with turbine type VNT. This abbreviation means that this compressor with a variable nozzle. Supplier of turbines for «Volkswagen» is "Garrett". The design of this site suggests the presence of:

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• Vacuum actuator.
• Management Mechanism.
• The Guide vanes.

Recently created to change the flow rate of the exhaust gas. This is due to the adjustment value of the cross section of the channel. Thus, the blades can rotate around its axis at a certain angle. This action is performed by means of the control mechanism. It consists of a lever and rings. The actuation mechanism provides a vacuum unit. He acts on the lever via a special thrust. Vacuum operated valve is provided for limiting the boost pressure. It is connected to the electronic engine management system. The mechanism is triggered on the magnitude of boost pressure and air temperature at the inlet.

TDI and "Audi TT"

TT & ndash; this is one of the most popular coupe from “Audi”. Earlier the car was staffed only diesel power plants. Diesel units were previously considered "vegetable” and had a low thrust. In addition, this sports coupe just needed a high-speed motor. But after applying “Audi TT" engine TDI all the stereotypes were dispelled. This diesel engine had just an incredible performance. With two litres of displacement it developed 170 horsepower power and a whopping 350 Nm of torque. This gave a significant increase in dynamics. Before hundreds of car accelerates for 7 and a half seconds. And a top speed of 226 kilometers per hour. And now the main point – fuel consumption. And consumed this unit on hundreds of just 5.3 liters in mixed mode. You will not believe, but this is the real passport data from the manufacturer.

Environmentally friendly

Motors line TDI hold leading positions on the market for 20 years. One of them was technology Clean Diesel. She provides deep cleaning of the exhaust gases by converting the nitrogen oxides into water vapour. The system is already implemented and successfully used in the USA in 2014. Motor 3.0 TDI complies with all the norms of content of harmful substances in the exhaust. Co emissions per kilometer is only 130 grams.

What are the advantages of the TDI engine?

What it is, we have already found. Now let's consider the main advantages of data turbocharged installations. In General, after joining “Audi” the concern VAG, has taken a leading position in the list of manufacturers of diesel engines. Thanks to innovative engineering solutions, their engines are different:

• High fuel efficiency.
• Low noise (almost inaudible at idle).
• High performance dynamics and torque.

Also, these power plants meet the latest environmental standards (standard exhausts “Euro-6”). A significant increase in power was achieved thanks to a special construction of the turbine. Unlike other engines, compressors installations from VAG is able to work under pressure 2 thousand bar. Modern analogues give only 1300 Bar. Also TDI engines combined with the injector pump. This allows for maximum control over fuel injection.

Conclusion

So, we learned what features has the TDI engine, what is it and what are its benefits. At the moment, the TDI engines are among the most powerful, quiet and environmentally friendly. No wonder they occupy a leading position in the global market.