What are the characteristics of turbocharging? What does twin turbo mean?

The main function of turbocharging is to increase the air intake of the engine, thereby increasing the power and torque of the engine and making the car more powerful. When an engine is equipped with a turbocharger, its maximum power can be increased by 40% or more compared to without a turbocharger. This means that the same engine can produce more power after being pressurized.

Take our most common turbocharged engine, for example, after supercharging, the power can reach the level of the engine, but the fuel consumption is not much higher than the engine, on another level is to improve fuel economy and reduce exhaust emissions.

Twin turbocharging is one of the ways of turbocharging. In view of the turbo hysteresis phenomenon of exhaust gas turbocharging, two turbines in series, one large and one small, or two identical turbines in parallel, can drive the turbine to rotate at high speed with less exhaust at low engine speed to generate sufficient intake pressure and reduce the turbo hysteresis effect.

The common turbocharging is single turbocharging, which is divided into mechanical turbocharging, exhaust gas turbocharging and composite turbocharging.

Mechanical supercharging is the engine running directly to drive the turbine, the advantage is that there is no turbo hysteresis, the disadvantage is that part of the power is lost, and the boost value is low.

Exhaust gas turbocharging is to rely on the remaining kinetic energy of the engine exhaust to drive the turbine rotation, the advantage is that the turbine speed is high, the supercharging value is large to the power to improve the obvious, the disadvantage is that there is turbo hysteresis, that is, the engine at a low speed (generally below 1500-1800 rpm) exhaust kinetic energy is small, can not drive the turbine to rotate at high speed to produce the effect of increasing the intake pressure, the engine power at this time is equivalent to natural aspiration, when the speed increases, the turbocharging plays a role The power will suddenly increase.

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It is able to add 30%-100% of the power output to the engine on the basis of the engine of the same displacement, mainly because the engine increases the amount of air absorbed by 50% to 300%, so that the fuel can be completely burned, so as to make greater work.

The turbocharger often works at high speeds and temperatures, the temperature at the turbine end of the supercharger exhaust gas is above 600, and the speed of the supercharger is also very high, reaching more than 12000rpm. Therefore, in order to ensure the normal operation of the turbocharger, it is very important to use and maintain it correctly.

The structure of a turbocharger.

The gasoline engine turbocharging system is composed of two parts: a turbocharger and an intercooler, the air is compressed through the turbocharger, and the compressed air is cooled by the intercooler, and the turbocharger is composed of a turbine chamber and a supercharger.

The air intake of the turbine chamber is connected to the exhaust manifold, and the exhaust port is connected to the exhaust pipe; The air intake of the supercharger is connected to the air cleaner duct, and the exhaust port is connected to the air intake duct leading to the intake manifold. The turbine and impeller are installed in the turbine chamber and the supercharger respectively, and the two are coaxially rigidly connected. The intercooler is part of the turbocharging system.

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Turbocharging is actually a kind of air compressor, which increases the air intake of the engine by compressing air, thereby increasing the power and torque of the engine and making the car more powerful.

Turbocharging features and advantages: (1) increase power by 20% to 50% (2) improve economic performance, mechanical efficiency and thermal efficiency (fuel consumption reduced by 5% to 10%) (3) reduce exhaust noise and smoke.

Disadvantages: poor acceleration performance, serious heat load problems, sensitive to air temperature and air pressure, low speed (less than 1500r min) and poor pressurization effect.

Features of turbocharging.

A turbocharged engine refers to an engine equipped with a turbocharger. A turbocharger is actually an air compressor that compresses air to increase the amount of air taken in. It uses the inertia impulse of the exhaust gas discharged by the engine to push the turbine in the turbine chamber, and the turbine drives the coaxial impeller, and the impeller pressurizes the air sent by the air filter pipe to pressurize it into the cylinder.

The difference between turbocharging and twin-turbocharging is: 1. Twin-turbocharging mainly adopts two independent turbocharging Huaizhong device boosting systems. When the two turbochargers of the engine work together, the air intake efficiency is greatly improved, and the supercharging effect and power are also significantly improved.

2. However, the twin-turbo engine cannot completely eliminate the lag phenomenon of the lead mountain turbine. The turbocharger impeller habitual dislike effect is still present. In practical application, twin-turbo engines should be installed on engines with large displacements such as in-line 6-cylinder and V-type.

3. Single turbocharging uses a compressor to compress the gas into the cylinder in advance, improve the sealing degree of the gas entering the cylinder, and reduce the special body of gas. As a result, the mass of the gas per unit volume increases significantly. More fuel can be injected into the limited cylinder volume to burn, increasing engine power.

4. It is necessary to distinguish between single turbocharging, mechanical turbocharging, exhaust gas turbocharging, and composite turbocharging.

What is the difference between twin-turbo and single-turbo A twin-turbo engine has two turbochargers, while a single-turbo engine has only one turbocharger. The twin-turbo engine has lower turbo lag and faster power response. Turbocharging technology can increase the air intake of the engine without increasing the engine displacement.

Turbocharging technology was first applied to aircraft engines, and turbocharging can solve the problem of insufficient air intake encountered by aircraft engines at high altitudes.

Later, turbocharging technology was widely used in automobile engines.

Turbocharged engines have turbochargers, and turbochargers are made up of two parts, one is a compression turbine and the other is an exhaust turbine.

The exhaust turbine is coaxially connected to the compression turbine, and the exhaust turbine is connected to the exhaust manifold, and the compression turbine is connected to the intake manifold.

When the engine reaches a certain speed, the exhaust has enough energy to push the exhaust turbine to rotate.

When the exhaust turbine rotates, so does the compression turbine, which can compress and blow air into the engine cylinder as it rotates.

The engine is fueled by a mixture of air and gasoline, and by increasing the amount of air intake and then increasing the amount of fuel injected, the engine can burst out with more horsepower.

Turbocharging technology is the most straightforward way to increase engine power.

There is also a way to increase the air intake of the engine, which is different from turbocharging.

What are the characteristics of a twin-turbo engine.

Twin-turbo engines have less turbo lag and more horsepower.

Twin-turbo technology is generally used in some 6-cylinder, 8-cylinder, 10-cylinder, and 12-cylinder engines, which can reduce turbo lag.

Anyone who has ever driven a car with a turbocharged engine must know about turbo lag.

The principle of turbocharging is very simple, this engine has a turbocharger, and the turbocharger is made up of two parts.

One part of the turbocharger is the exhaust turbine, and the other part is the intake turbine, which is coaxially connected to the exhaust turbine.

The exhaust turbine is connected to the exhaust manifold of the engine, when the engine reaches a certain speed, the exhaust has enough energy to push the exhaust turbine to rotate, and the intake turbine will also rotate, so that the intake turbine can compress the air and blow the air into the engine cylinder.

Turbocharging technology can increase the amount of air entering the engine cylinders without increasing the engine displacement.

Turbo hysteresis is caused by the turbine, the blades of the turbine have a certain weight, and the bearings of the blades also have a certain resistance, so this requires the engine to reach a certain speed, so that the exhaust has enough energy to push the turbine.

When the engine does not reach this speed, the turbo will not be supercharged, which is the phenomenon of turbo hysteresis. (Photo by Q&A: Q&A called the beast) @2019

The so-called twin-turbo trap mold is a supercharging system with two independent turbochargers, usually equipped with in-line 6-cylinder or V-shaped and other high-speed and high-displacement engines. When the two turbo boosters work together, the intake efficiency is greatly improved, the supercharging effect is more significant, and the power is also greatly improved.

The meaning of twin-turbocharging is that two independent turbo axles will be used on the car to make the supercharging system, and the way of sock shortage supercharging will make the car have greater inertia and efficiency, so that the car can run faster, and the power performance is more perfect.

Twin turbocharging is a turbo hysteresis phenomenon in which the turbo is driven to rotate at high speed to generate sufficient intake pressure and reduce the turbo hysteresis effect when the engine is low.

The differences between twin turbo and single turbo are: 1. Twin turbo refers to having two turbochargers, while a single turbo has only one turbocharger; 2. The dual-defeat turbocharging system uses two independent turbochargers. Most of them are to alleviate the "lag phenomenon"; 3. Turbocharging is single-turbocharging, which is divided into mechanical turbocharging, exhaust turbocharging and compound supercharging; 4. Turbocharging mainly uses turbocharging.

In our daily lives, the single turbocharger we come into contact with the most is the one that is most exciting. Its biggest advantage is that it is cheap, but at the same time there is the problem of "lag". Especially when the car is driving at low speeds, when the exhaust gas is not enough to drive the turbine to drive the compressor to work, it is obvious that there is some "meat" in the car.

In the case of high-end models, a turbocharger with a single turbo twin scroll can be installed. This is similar to a normal turbo, except that a discarded pipe has been added to reduce the lag of the turbo. The presence of twin turbos compensated for the lack of a single supercharger lag, using two separate turbochargers.

The turbocharger's intervention in engine speed is determined by a variety of factors, the most important of which is the turbocharger's blade inertia. The blades with low inertia reduce the speed of intervention, i.e. the turbine can be driven even at low speeds.

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The twin-turbo engine has less turbo lag and more horsepower.

Twin-turbo turbocharging technology is generally used in some 6-cylinder, 8-cylinder, 10-cylinder, and 12-cylinder engines to reduce turbo lag.

Anyone who has ever driven a turbocharged engine car must know turbo lag.

The principle of turbocharging is simple. This engine has a turbocharger and consists of two parts.

Part of the turbocharger is the exhaust turbine, and the other part is the intake turbine, which is coaxially connected to the exhaust turbine.

The exhaust turbine is connected to the exhaust manifold of the engine. When the engine reaches a certain speed, the exhaust gases have enough energy to drive the exhaust turbine to rotate. At this time, the intake turbine will also rotate, so that the intake turbine compresses the air body, blowing the air body into the engine cylinder.

Turbocharging technology increases the amount of air that can be removed into the engine cylinders without increasing the engine displacement.

Turbo lag is caused by turbines. The blades of the turbine have a certain weight, and the bearings of the blades also have a certain resistance, so the engine needs to reach a certain speed so that the exhaust gases have enough energy to propel the turbine.

When the engine does not reach this speed, the turbo is not supercharged, which is the phenomenon of turbo lag.

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