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Comparison of supercharger and turbocharger

Time: 2018-11-17

In fact, these two supercharging technologies are not new. The emergence of turbocharging technology has been more than 100 years old, and the supercharging is earlier, but these two technologies were not provided for the car earlier. The earlier supercharging technology was mainly used for mine ventilation and industrial boiler intake. Turbocharging was the technology used in aircraft during the First World War. Later, these two technologies slowly entered the automotive industry. With the continuous advancement of modern technology, these two technologies have been around for centuries. The red is a mess.

When it comes to turbocharging, naturally it will mention natural inhalation, and then there will be two gangs - self-powder and vortex powder. The natural suction structure is relatively simple, and the turbocharger adds a set of turbines to the natural inhalation. Pressure, in terms of power will naturally be stronger than self-priming, as the turbo lag problem with the advancement of modern technology, the delay is not obvious.

The earliest turbocharging technology was used in airplanes. Engineers discovered the charm of turbocharging. After continuous experimentation, in 1962, General Motors put an OldsmobileJetfire into a turbocharger system. The pressure became the first car in the world to adopt turbocharged technology, and then there was the later BMW 2002, the originator of the 3 Series, and the Porsche series, Saab 900, and then the Audi 80, 100 also used the turbine. Supercharging technology.

The principle of turbocharging technology is actually very simple. In simple terms, it consists of a supercharger and a turbine. The two are connected by a drive shaft. When the vehicle travels to a certain speed, the exhaust gas from the exhaust valve is enough to push the turbine blades. The entire turbocharger system is connected to work. The high temperature exhaust gas pushes the turbine blade to rotate, and the blade drives the supercharger to rotate through the transmission shaft to compress the air entering the intake pipe. Because the temperature of the compressed air rises, the air needs to be cooled by the intercooler to enter the engine intake. This increases the lung capacity of the engine, and then cooperates with the direct injection in the cylinder to achieve the ideal air-fuel ratio, the power is enhanced, and the fuel economy is also improved.

Of course, in the era when turbocharging was just used, the technology was not mature. In turbocharged cars, there was often intermittent power, which is now called “turbo lag” because the accelerator pedal is released. For a moment, the engine speed will drop faster. When the oil is continued, the turbine will rotate to drive the turbocharger impeller. It will take a while to complete this series of actions. Of course, this time is very short, so in order to solve this problem, In the 80s and 90s racing competitions, the partial ignition device was used to solve the problem of turbo lag.

By the end of the 1990s, China had introduced a number of Volkswagen Passat 1.8T. The earliest Passat should be in 1998. Then, in 2002, the Audi A61.8T, turbocharged technology officially entered the Chinese market, and was favored by consumers. At the same time, the problem of turbo lag has become the primary problem for engineers of major car companies. Unlike naturally aspirated engines, turbocharged engines need to reduce the compression ratio and increase the boost value to reduce turbo lag. This is also the measure taken by major car companies today, and the current technology is relatively mature, and the turbo lag is not obvious.

Let's talk about supercharger. The mechanical supercharger was first applied to mineral and industrial boilers. It was first used in the automotive industry in the early 20th century. Mercedes-Benz is the first car company in the world to use supercharged technology.

The principle of supercharging is also very simple. The air passes through the air inlet, passes through the air filter and then enters the main inlet of the supercharger. The supercharged rotor rotates to compress the incoming air, and the generated high temperature gas is cooled by the intercooler. Then enter the intake combustion, so the difference between supercharged and turbocharged is that the supercharger participates in the work regardless of how fast or slow the vehicle is running. The supercharger blades are continuously rotating, of course, with turbocharger. The difference is that the supercharger will have a higher torque than the turbo at low speed, but at high speeds, the power performance is relatively weaker than the turbo, because the supercharger consumes the engine's power while driving. Therefore, the supercharger is more suitable for large-displacement engines, and the supercharger is more precise than the turbocharger, and the maintenance cost will be greater.

For turbocharged and supercharged fuel consumption, turbocharged fuel economy will be better, of course, this is not inevitable, like the Audi S64.0 twin-turbo engine, the fuel consumption of violent driving will reach 20%. In the final analysis, it still has a lot to do with the driving habits of the driver. In order to save the life of the car and the loss of the silver, it is safe and safe to drive.

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