Comparison of mechanical and turbochargers

In fact, speaking of these two supercharging technology is not new, the emergence of turbocharging technology from now has more than 100 years of history, supercharging is earlier, but these two technologies were not provided for cars, the earlier supercharging technology is mainly used for mining and ventilation and industrial boiler intake. Turbocharging is the technology used in the first World War on the aircraft, and later the two technologies slowly entered the automobile industry, with the continuous advance of modern technology, the two have been a hundred years of technology red confusion. When it comes to turbocharging, natural aspiration is naturally mentioned, and two gangs are generated immediately: self-suction powder and vortex powder. The structure of natural aspiration is relatively simple. Turbocharging is equipped with a set of turbochargers on the basis of natural aspiration, which is naturally stronger than self-suction in terms of power. The earliest turbocharging technology was first used in aircraft, engineers found the charm of turbocharging, after continuous experiments, and then in 1962, General Motors put an Oldsmobile Jetfire into a turbocharging system -- V8 turbocharging, which became the first car in the world to adopt turbocharging technology. Then came the BMW2002, the forerunner of the 3 Series, and the Porsche series, the Saab 900, followed by the Audi 80 and 100.

The principle of turbocharging technology is actually very simple, in simple terms, it is composed of a supercharger and a turbine, and the two are connected by a drive shaft. When the exhaust gas discharged from the exhaust valve is enough to push the turbine blade when the vehicle travels to a certain speed, the entire turbocharging system is connected to work. The high-temperature exhaust gas drives 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. As the compressed air temperature rises, the air needs to be dissipated by the intercooler to burn at the inlet of the engine. In this way, the lung capacity of the engine is increased, and then the direct injection in the cylinder is combined 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 technological development was not mature, and there would often be intermittent power in the car equipped with turbocharging, which is now called "turbo hysteresis", because the engine speed would decline faster when the accelerator pedal was released. When the oil was continued, the turbine would rotate again to drive the turbocharger impeller. It will take a while to complete this sequence of actions, of course, this time is very short, so in order to solve this problem, in the 80's and 90's motor racing, the use of off-time ignition mounting to solve the problem of turbine lag.

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

To talk about supercharging, supercharging was first used in mining and industrial boilers, first applied in the automotive industry in the early 20th century, Mercedes Benz is the world's first car company to use supercharging technology.

The principle of supercharging is also very simple, the air through the inlet, through the air filter filtration and then into the main inlet of the supercharging, the supercharging rotor rotation will enter the air compression, the generated high temperature gas through the intercooler cooling and then into the inlet combustion, so the difference between supercharging and turbocharging is that the supercharging no matter how fast or slow the vehicle is traveling, all participate in the work. Turbocharger blade is constantly rotating work, of course, different from turbocharging is that turbocharging at low speed, torque will be larger than turbocharging, but at high speed, the power performance is relatively weak than turbocharging, because turbocharging also consumes the power of the engine while driving, so turbocharging is more suitable for large-displacement engines. And supercharging is more sophisticated than turbocharging, and maintenance costs 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 turbocharged engine, violent driving 100 kilometers fuel consumption will also reach 20 smaller, in the final analysis or the driver's driving habits have a lot to do with the life of the car and the loss of silver. Just drive safely.

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