What is an adjustable vane turbine? What are the advantages?

The supporting structure of the adjustable vane axial turbine discharge ring has interconnected upper and lower half supporting components. The upper support part is detachably connected to the turbine discharge ring and the lower half support part. The drain ring is divided into two halves, the lower half is supported by the upper half of the supporting parts, so that the upper and lower halves of the drain ring can be moved vertically by moving the upper half of the supporting parts, and the rotor can also be moved out axially without contact with any other components.

The upper part of the supporting part is tubular and equipped with a shock absorber to dampen the vibration in the exhaust ring. (I also searched on the Internet, I don't know if it's useful).

Being able to adjust the geometry of the guide vanes increases the power of the engine.

Porsche's Porsche VTG variable supercharged turbine blade geometry technology has the advantage of ordinary turbines of other brands Porsche's failure rate is the lowest in the world, and there should be no big problem in terms of life. VTG just can.

Adjustable turbine is the most widely used in the engine gauge of the car, in the whole measurement process, when the engine speed decreases, the exhaust pressure also decreases, then the angle of the guide vanes can be adjusted to reduce the turbine intake cross-section, and then increase the turbine intake pressure. As the engine speed increases, the exhaust pressure also increases, and the angle of the guide vanes can be adjusted to increase the turbine intake cross-section.

Therefore, the adjustable vane turbocharger is particularly effective when the engine is partially loaded, which can effectively improve the phenomenon of "turbo hysteresis". It can improve the engine power, better match the engine, and also have a positive effect on reducing the emission of harmful gases.

Let's explain it in an easy-to-understand way.

The variable part does not rotate, but only acts as a diversion and does not rotate with the turbine.

At low engine speeds, the larger turbine blades of the 911 Turbo are not easily pushed due to the small flow of exhaust air. In this case, the angle of the variable deflectors in the variable turbine geometry that is installed parallel to the turbine blades and around it becomes smaller. This reduces the space for airflow to pass through, increases the flow rate, and makes it easier to push the blades.

And when the speed is high, the gas flow is sufficient, and the variable deflector will become |||shape, will not hinder the large flow of gas, allowing the turbine to obtain.

Maximum boost value.

Many diesel trucks also use this technology.

The general structural principle of a turbocharger, the exhaust gas turbocharger is mainly composed of a pump wheel and a turbine, and of course some other control elements. The exhaust gas discharged from the engine drives the pump wheel, the pump wheel drives the turbine to rotate, and the turbine rotates to pressurize the air intake system. The supercharger is installed on the exhaust side of the engine, so the working temperature of the supercharger is very high, and the speed of the rotor is very high when the supercharger is working, which can reach more than 100,000 revolutions per minute, such a high speed and temperature make the common mechanical needle roller or ball bearing unable to work for the rotor, so the turbocharger generally adopts full floating bearing, lubricated by oil, and coolant cools the supercharger.

Hello, useless. If it is useful to design and manufacture automobiles, it will not choose turbocharging, which is costly.

Hello, depending on your situation as well as our repair experience. Basically, it's useless, it's not recommended to add, I hope mine makes you satisfied, I wish you a happy car.

It's too complicated, you can buy a basic advanced textbook and take a look.

One or two sentences don't understand that it involves **data, and so on.

TDI : Turbo Direct Injection Turbocharged Engine).

TDI is the abbreviation of Turbo Direct Injection in English, which means turbocharged direct injection (diesel engine). In order to solve the congenital deficiency of SDI, people have installed a turbocharging device on the diesel engine, which greatly increases the intake pressure, and the compression ratio is generally more than 10, so that it can achieve a large torque in the case of very low speed, and because the combustion is more sufficient, the harmful particle content in the emissions is also greatly reduced TDI technology allows the fuel to be injected directly into the cylinder through a high-pressure injector, because the piston top shape is a concave bowl-shaped design, The fuel forms a spiral mixture in the cylinder. The direct-injection turbocharged diesel engine (TDI) pioneered by the Volkswagen Group equipped with Bora TDI is very advanced, and a number of advanced technologies, such as pump injection system and adjustable vane turbocharger, are applied for the first time in a domestic car.

Bora TDI uses the latest high-pressure fuel injection technology ——— pump injection system. This system allows the diesel to be mixed with air more fully and burned more thoroughly; At the same time, the oxidation catalytic reactor is adopted, which greatly reduces the emissions of CO, HC and particles, and the CO2 emission can be reduced by 30% compared with gasoline vehicles with the same displacement. In addition, the EGR system greatly reduces NOx production, and its emission indicators meet Euro 3 standards.

The TDI logo of the Volkswagen diesel engine is currently recognized as the most successful diesel engine in the world.

New Era Power TDI Diesel Engine Bora TDI is equipped with the first direct injection turbocharged diesel engine (TDI) technology of the Volkswagen Group, which is very advanced, and adopts a number of advanced technologies, such as pump injection system, adjustable vane turbocharger, etc., which are applied for the first time in domestic cars.

This section of the jetting technology.

Bora TDI uses the latest high-pressure fuel injection technology ——— pump injection system. This system allows the diesel to be mixed with air more fully and burned more thoroughly; At the same time, the oxidation catalytic reactor is adopted, which greatly reduces the emissions of CO, HC and particles, and the CO2 emission can be reduced by 30% compared with gasoline vehicles with the same displacement. In addition, the EGR system greatly reduces NOx production, and its emission indicators meet the EU3 standard.

The technological breakthrough of the pump injection system has brought about a revolution in the concept of diesel cars, that is, the torque and speed of diesel cars are like the world compared with the past. The maximum torque of Bora TDI can reach the revolution, and the torque output in the wide speed range of 1500 rpm and 3000 rpm is more than 200Nm. Therefore, the starting and acceleration performance is particularly excellent, and the maximum speed is almost the same as that of Bora gasoline cars.

Bora TDI and Bora are also the best works of "T" charm, and they are also unrivaled rulers in their respective fields. With an injection pressure of up to 1,920 bar, the system was developed in response to the fact that the combustion quality is directly dependent on the absolute pressure at which the fuel is injected into the cylinder. The Bora TDI engine has a pump nozzle per cylinder, and the amount of diesel fuel required for the power stroke of each cylinder is divided into two parts: pre-injection and main injection, the main injection is carried out after the crankshaft turns several degrees after the pre-injection starts, and the interval between them is controlled by a hydraulic mechanism.

The injection time, the injection volume and the stop time are all controlled by a solenoid valve. The use of this technology enables the diesel engine to achieve the ideal state of smooth and efficient combustion, and reduces the combustion noise and nitrogen oxide content in the exhaust gas.

Performance benefits in this section.

The traditional turbocharger has the shortcomings of boost lag at low engine speed, while the adjustable vane turbocharger adopted by Bora TDI can generate the required charging pressure at any speed, and the performance is greatly improved compared with the traditional turbocharger, which improves the adaptability of the engine, and can also ensure the output of high power when the engine speed is low. As the engine intake pressure is always optimal, combustion efficiency is improved over the entire rev range, resulting in fuel savings and improved emissions. However, turbocharged engines do not have obvious advantages in crowded cities, and they will increase maintenance costs, so you should still consider your own travel characteristics when choosing!

It is Volkswagen's turbocharged fuel common rail injection diesel engine.

TDI = Turbo Diesel Injection, which is directly translated as turbocharged diesel injection engine.