Now 80% of the models running on the market can be said to be supercharged models, especially turbocharging accounts for the majority, with strict emission standards, small displacement turbo began to prevail, plus turbo technology is more and more mature, and there is no obvious negative news, turbocharging is gradually accepted by everyone, which makes everyone in the car selection if you do not buy a turbocharged model, will feel that they have no face, but there are so many models with turbocharging on the market, why will they be equipped with turbocharging, rather than mechanical supercharging, Even more and more car companies have opened the abandonment of mechanical supercharging, even the American cars that especially love to carry mechanical supercharging can not see the use of mechanical supercharging in China, and today I will talk about the two mainstream supercharging on the market.
Machine added benefits
American cars are definitely representatives of mechanical supercharging, the main reason why American cars like to use mechanical supercharging, the main reason is that mechanical supercharging has the same linear power output as natural suction, and the sound of mechanical supercharging is more unique, and the general displacement of American cars is relatively large, large displacement is more suitable for carrying mechanical supercharging, and the types of mechanical supercharging are also more than turbocharging, which are probably divided into three types, double helix mechanical supercharging, Lu-type mechanical supercharging, centrifugal mechanical supercharging. Let's start with the double helix supercharging.
The principle of double helix mechanical supercharging is to achieve the purpose of pressurization through two meshing teeth that bite each other, and the air inhaled in will continue to be compressed by two rotors, and the two rotors also have a certain tilt angle, which means that the air flows through the supercharger after flowing to the exhaust port at the same time, the airway will become smaller Air will be compressed to a smaller space, which makes the air continuously compressed, improving the engine intake efficiency.
Lu-type supercharging is also through two rotating rotors to suck in the air to compress, but Lu-type supercharging can not be regarded as the real meaning of the compressed air, that is, simply the air sucked in in the engine, the higher the engine speed, the more air is obtained, the Lu-type supercharging work efficiency is also the lowest in the mechanical supercharging, but Lu-type supercharging has an advantage that is low torque, Lu-type supercharging is a supercharger that is very suitable for use in a low-pressure state. Cars like the American 0-400 straight-line race are very fond of using Lu-style supercharging.
Centrifugal supercharging appearance is more like turbocharging, the work is indeed through the internal high-speed rotation blade to improve the intake pressure, compared to the above two kinds of supercharging, centrifugal supercharging volume is much smaller, the structure is relatively simple, installation is more convenient, power output is also linear. Simply put, there is no delay in comparing the turbocharging, the supercharging work is also connected to the crankshaft end of the engine through the belt, as long as the engine rotates the supercharging will always work, which is also the basis of the linearity of the supercharging power output, and the supercharging calculation method is also more interesting, such as how many bars are the turbocharging pressure to calculate, and the supercharging is calculated by the rise, because the mechanical supercharging inside is a volume, the larger the volume, the more compressed air, For example, if a 6.0L engine uses a 2.0L supercharging, then the power of the engine of the car is 8.0L, and the mechanical supercharging is better than the turbocharging in terms of durability.
Machine increase disadvantages
Just said that when the supercharging work needs to be connected to the engine through the belt, this can be said to be the biggest disadvantage of the supercharging, which makes the engine drive the supercharging at the same time will lose a little power, For those displacement above 4.0L, even if there is a power consumption impact is not large, because the installation of mechanical supercharging to improve the horsepower will be much more than the horsepower consumed, if it is some of the long-distance running 2.0L models on the market, the horsepower is basically within 200, if the installation of mechanical supercharging on the horsepower improvement effect is not only not obvious, the engine with mechanical supercharging has become a burden, which is also the reason why the small displacement is almost not equipped with mechanical supercharging, before the Audi 3.0T engine will also use mechanical supercharging, but Audi finally abandoned this engine and used turbocharging, and there is a hard condition is space , the volume of the supercharging is relatively large, and will be placed on the top of the engine, so the requirements for the engine cabin space are very high, and the models equipped with supercharging are basically models with longitudinal engines, but there are also models like volvo XC90 that use mechanical + turbocharged double supercharging, and the last point is noise, if not from the perspective of playing cars, supercharging is a kind of noise, because not all supercharging will be as good as hellcats.
Turbo advantages
The advantages of turbocharging are very obvious, especially in the current era of small displacement, under the premise of not increasing the displacement to get more power, adding turbocharging is the best way, the volume of the turbo itself is much smaller than that of the mechanical supercharging, even smaller size models can also be equipped with turbocharging, in the same displacement of the turbo model power will be better than the natural suction model, even in the case of natural suction horsepower than the turbo model horsepower, turbocharged model is still better than the natural suction power.
Turbo disadvantages
About the shortcomings of turbocharging, many people should know more than the advantages, like high temperature, high maintenance in the later stage, these are open mouths to come, may study a little deeper people also know the turbo hysteresis, these are indeed the shortcomings of the turbine, to know that the action principle of turbocharging and mechanical supercharging is completely different, turbocharging although it does not consume the power of the engine, but the turbocharging needs to blow the turbine through the exhaust gases discharged by the engine, which is also the reason for the hysteresis, although the engine has been working, the turbine has been rotating, However, this speed can not reach the purpose of supercharging, the working environment temperature of turbocharging is relatively high, and its own speed can reach 100,000 rpm or even higher, which is also the reason why the turbocharging life is not as long as the life of mechanical supercharging.
brief summary
After saying that the two kinds of supercharging can be seen, whether it is mechanical supercharging or turbocharging, these two kinds of superchargers are essentially no difference, are to increase the intake volume, so that the vehicle to obtain better power, but these two kinds of superchargers face the crowd or model is completely different, mechanical supercharger is more suitable for large displacement, there are linear requirements for power output, and the mechanical supercharging volume is also relatively large, at present, it is completely inconsistent with ordinary family cars, which is also the reason why there are few mechanical supercharged models in China at present. On the contrary, the smaller turbocharging is very advantageous, almost from top to bottom, a large displacement model of a turbine is not enough to add one, become a twin turbo, and even some models in order to solve the turbo lag will also be equipped with an electronic turbine to assist, in the current global are advocating energy saving and emission reduction, 2.0T is already a large displacement, turbo is not to reduce the displacement at the same time can also let you get a better driving experience of the most convenient way, but also the car companies can meet the emission standards of the way, Although there are still some shortcomings in turbocharging, but at present, the turbo technology of each car company has been quite mature, the service life is longer, and even rarely hear whose turbo will explode, although the mechanical supercharging is good, it is not suitable for the domestic car environment, so it is still in line with the market environment to choose the turbo car, not to mention that there is no other option in addition to the turbine.
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