What are the types of supercharged engines?

There are four main categories:

Mechanical Booster System 2Exhaust gas turbocharging system 3Composite pressurization system 4Airwave pressurization system.

Supercharger: Installed on the engine and connected to the engine crankshaft by a belt, the engine output shaft receives power from the engine output shaft to drive the supercharger's rotor to rotate, thereby blowing air pressurized into the intake duct.

Exhaust gas turbocharging system: The exhaust gas discharged from the engine is used to achieve the purpose of pressurization. The supercharger has no mechanical connection to the engine, and the compressor is driven by a turbine driven by the exhaust gases of the internal combustion engine.

Generally, the pressurization pressure can reach 180-200kpa, or about 300kpa, and an air intercooler needs to be added to cool the high-temperature compressed air.

Compound supercharging system: that is, exhaust gas turbocharging and mechanical supercharging are used together, and high-power diesel engines are used more. The engine output of the composite supercharging system is high, the fuel consumption rate is low, and the noise is low, but the structure is too complex.

Air wave booster system: The pulse air wave of high-pressure exhaust gas is used to force air compression. This kind of system has good low-speed boosting performance, good acceleration and a wide range of working conditions; But it is large, bulky and noisy.

The types of engine supercharging can be roughly divided into four types: turbocharging, mechanical supercharging, air wave supercharging, and compound supercharging. The first two are more common.

The engine engineering state late training method refers to the characteristics of this engine, which is divided into: naturally aspirated, turbocharged, and mechanically charged.

and double supercharging: 1. Natural inhalation:

Naturally aspirated is the only type of car intake that is atmospheric pressure without passing through any supercharger.

A form of pressing air into the combustion chamber, a naturally aspirated engine.

In terms of smoothness and direct response in power delivery, it is far better than that of supercharged engines.

2. Turbocharging:

Turbocharged engines rely on turbochargers.

It uses the exhaust gas discharged from the engine as a power to drive the turbine located in the exhaust tract, and the turbine rotates while driving the impeller located in the coaxial air intake, and the impeller is compressed by the air filter.

The fresh air sent by the pipe is then fed into the cylinder, and when the engine speed increases, the power output is higher.

3. Mechanical pressurization:

Supercharging refers to the problem of low intake efficiency in the high-rpm area of the naturally aspirated engine, starting from the most basic key point, that is, to find a way to increase the air pressure in the intake manifold to overcome the valve interference resistance, although the intake manifold, valve, camshaft.

The size remains the same, but as a result of the increase in intake pressure, the amount of air that can be squeezed into the combustion chamber increases each time the valve is opened, so the amount of fuel injected can also be relatively increased, making the engine more energetic than before the boost.

Supercharging helps with torque output at low rpm, but power output is limited at high rpm; Exhaust gas turbocharging, on the other hand, has a strong power output at high revs, but is not as powerful at low revs. Engine designers then envisioned a combination of supercharging and turbocharging to address the shortcomings of both technologies, while addressing both low-speed torque and high-speed power output. In 2005, Volkswagen began assembling this technology into the mass-produced Golf TSI, a system known as "dual supercharging" that combines low-speed torque output with high-speed power output.

The engine mode of operation refers to the characteristics of this engine, which are divided into: naturally aspirated, turbocharged, supercharged and dual-supercharged.

1. Exhaust gas turbocharging.

The exhaust gases discharged from the combustion of the engine drive the turbine on the exhaust side to rotate; In this way, the impeller on the other side is rotated. When the impeller rotates, the engine can draw in more air and compress it to achieve the purpose of more air intake.

2. Mechanical pressurization.

Mechanical boosting is available at low speeds. And because it is directly driven by the engine, the supercharging effect is enhanced as the engine speed increases.

3. Compound pressurization.

Compound supercharging, in fact, is a car with both mechanical supercharging and exhaust gas turbocharging. They work together at high and low speeds to achieve the best results in all operating conditions.

4. Harmonic pressurization is actually what we often call the variable intake manifold (length and cross-sectional area), and the straightforward point is to change the frequency of harmonic pressurization by adjusting the length or cross-section of the intake manifold to achieve the role of "supercharging".

There are currently two ways to supercharge automobiles: mechanical supercharging and exhaust gas turbocharging.

The advantages of the supercharger engine are that the turbocharger intervenes quickly, the vehicle starts with fast response and accelerates faster; The disadvantage is that it is driven by the engine belt, which will inevitably cause the engine power to decay and the fuel economy is low;

The advantage of the exhaust gas turbocharger is that the engine exhaust gas is used to drive the turbine movement, and the turbine drives the pump wheel to move through the rotating shaft, the fuel economy is higher, the energy is fully reused, and the engine power is significantly improved; The disadvantage is that the turbocharger requires certain conditions to intervene (generally around 1500R), and the acceleration of the whole vehicle is slower when it starts.

1. Harmonic pressurization changes the intake trajectory of the intake manifold.

Natural mechanical, turbocharged and mechanical.

Turbocharged, supercharged!!

There are 3 types of supercharged engines:

1. Mechanical boosting system: the device is installed on the engine and connected with the engine crankshaft by a belt, and obtains power from the engine output shaft to drive the rotor of the supercharger to rotate, so as to blow the air pressurized into the intake channel.

2. Air wave pressurization system: the pulse air wave of high-pressure exhaust gas is used to force air compression. This kind of system has good supercharging performance and good acceleration, but the whole device is relatively bulky and not suitable for installation in a smaller car.

3. Exhaust gas turbocharging system: The supercharger has no mechanical connection with the engine, but is actually an air compressor that increases the air intake by compressing air. It uses the inertial impulse of the exhaust gases discharged by the engine to push the turbine in the turbine chamber, which in turn drives the coaxial impeller.

Engine boosting systems are mainly divided into turbocharging, twin-turbocharging, supercharging, supercharging, turbocharging, supercharging, and non-mainstream supercharging. At present, exhaust gas turbocharging is mostly used in the market. Classification of vortex turbocharging system:

The supercharging system is mounted on the engine and is connected to the crankshaft of the engine by a belt. It gets power from the output shaft of the engine, which drives the rotor of the supercharger to rotate, blowing air into the intake manifold. The advantage is that the turbo speed is the same as the engine speed, there is no lag, and the power output is very smooth.

However, due to the installation in the engine shaft, it consumes some power, and the supercharging effect is not high. The gas wave boosting system uses pulsed air waves of high-pressure exhaust gases to force air compression. The system has good supercharging and acceleration performance, but it is noisy and bulky, making it unsuitable for installation in smaller vehicles.

Exhaust gas turbocharging systems are the most common turbocharging devices. The supercharger has no mechanical connection to the engine. It uses the inertial impulse of the exhaust gas to push the turbine in the turbine chamber and drives the coaxial impeller to pressurize the air into the cylinder.

It is installed on the exhaust side of the engine, so the operating temperature is very high, and the speed can reach more than 100,000 revolutions per minute. Theoretically, the installation of an exhaust gas turbocharger increases engine power and torque by 20%-30%. The composite boosting system is a system that combines exhaust gas turbocharging and mechanical supercharging, which is widely used in high-power diesel engines.

The advantages are that the output power of the hair and mu wax motor is high, the fuel consumption rate is low, and the noise is low, but the structure is complex, the technical content is high, the maintenance is not easy, and the promotion is difficult. Non-mainstream pressurization systems include nitro oxidation and gas wave pressurization. Nitrogen boosting forcibly injects nitrous oxide into the engine, resulting in higher combustion values and increased output.

Gas wave pressurization uses the pulse air wave of high-pressure exhaust gas to force air compression, which has good pressurization and acceleration performance, but it is noisy and the device is bulky, so it is not suitable for installation on smaller cars. Comparison of the advantages and disadvantages of several engine booster systems: Turbocharging the engine with a turbo will have a significant increase in power and torque, but the power output will lag slightly behind the opening of the throttle.

Twin-turbo engines alleviate the phenomenon of "turbo lag" by adding a low-speed turbo, but at a higher cost. The supercharging power output is smooth, but it consumes part of the engine power, resulting in low supercharging efficiency. Turbocharging combines the advantages of mechanical supercharging and turbocharging, but due to the complex structure and difficulty in matching with the engine, it is not widely used at present.

Non-mainstream booster systems have their own advantages and disadvantages, but they are less widely used.

The types of turbocharging of the hair sliding machine are: 1. Mechanical supercharging system: installed on the engine and connected with the engine crankshaft by a belt, and the power obtained from the engine output shaft drives the rotor of the supercharger to rotate, so as to blow the air pressurization into the intake channel; 2. Air wave pressurization system:

The pulse air wave of high-pressure exhaust gas is used to force air compression, which has good pressurization performance and good acceleration, but the whole device is relatively cumbersome and not suitable for installation in a small car; 3. Exhaust gas turbocharging system: The supercharger has no mechanical connection with the engine, but is actually an air compressor that increases the air intake by compressing air. 4. Composite boosting system: that is, exhaust gas turbocharging and mechanical boosting are used together, mechanical boosting helps to output torque at low speed, but the power output is limited at high speed, while exhaust gas turbocharging has a strong power output at high speed.