What Is a Booster Compressor?

Booster compressors are used for boosting compressors to increase the gas pressure to the suction pressure of the following compressor.

Booster compressor

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Booster compressor is used for booster compressor to increase gas pressure to the following

booster compressor

Booster compressor

Supercharger compressors used in cars were originally mechanical booster compressors . They were called Superchargers when they were invented. Later, after the invention of the turbine, in order to distinguish the two, the turbochargers were initially called Turbo Supercharger. Machinery is called the Mechanical Supercharger. Over time, the two have been simplified into Turbocharger and Supercharger respectively! The driving force of the mechanical compressor comes from the engine crankshaft.

Generally, the belt is used to connect the crankshaft pulley, and the torque actuator that runs with the crankshaft achieves the purpose. Depending on the structure, there have been many types of machinery, including: Vane, Roots, Wankle and other types. However, the first two are more common now. There are two types of Lutzers: two-leaf and three-leaf rotors. At present, two-leaf rotors are more common. Its structure is to install two cocoon-shaped rotors in an elliptical housing. direct contact. The two rotors are linked by a helical gear, and the rotating shaft of one of the rotors is connected with the driving pulley. The pulley of the rotor rotating shaft is equipped with an electromagnetic clutch. When not needed, the clutch is released to stop.

The opening and closing of the clutch is controlled by the computer to achieve the purpose of saving fuel.

The vane-type (also known as vortex) body is a type of vane-type body. Its operation mode mainly uses three planetary gear sets that can change the speed according to different centrifugal forces to drive the intake blades. Through the mutual friction between the gear set and the shaft center of the blade, the speed of the shaft center is increased and the speed of the intake blade is further increased to obtain a continuous response.

In other words, the higher the engine speed, the higher the speed of the intake blades.

Mechanical characteristics: There is a clear difference in power output between the machine and the turbine. The former has a linear output that is close to natural intake, while the latter has a relatively abrupt output due to the phenomenon of turbo lag, which is not so linear. Because of the mechanical action principle, it can be obtained at low speeds. The power output is also proportional to the crankshaft speed, that is, the power output of the mechanical engine increases with the increase of the speed. Therefore, the output performance of the mechanical engine is very similar to that of natural gas, but it can have large horsepower and torque.

Because the mechanism uses a belt drive, the blade speed inside the device is completely synchronized with the engine speed

The basic characteristics are:

Engine rpm X (R1 / R2) = rpm of the blade

? R1 engine belt radius?

R2 The radius of the mechanical belt pulley and the mechanical mechanism uses the engine speed to drive the internal mechanism of the mechanical mechanism.

The overall structure is simple, and the working temperature is between 70 ° C and 100 ° C, which is much more comfortable than the high temperature working environment of 400 ° C-900 ° C, which is driven by an exhaust gas turbine. Therefore, the requirements of the cooling system and lubrication system of the mechanical system are basically the same as those of the NA engine, and the maintenance procedures of the parts are also similar. In addition, the mechanical advantage is small size, no need to modify the engine body, easy installation, so it is also very popular in the modification industry in the United States. Vehicles originally designed for high-capacity NA are particularly suitable for retrofitting. When the car of the caravan is modified, the air-conditioning compressor is removed, and the Formula car, even the starter motor and the oil pump are changed to external connections, in order to reduce the burden on the engine. The machinery driven by the engine power, like the above components, will bring additional burden on the engine. Therefore, the resistance of the device itself must be as small as possible, so as not to drag the engine's working efficiency, and the engine speed can be increased faster. However, the amount of air entering the machine is directly proportional to the resistance. When using high, although the output energy of the engine increases greatly, the resistance of the blades inside the winder will also increase. When the resistance reaches a certain limit, this resistance will cause the engine to bear a great load, which will seriously affect the increase of the speed . Therefore, the machine must strike a balance between value and engine load to avoid the negative effects of high.

At present, most of the machines designed in Europe are low between 0.3-0.5bar, focusing on low-speed torque output and high-speed "high prototype" horsepower output. The new high efficiency device developed by Taiwan "Tega" can produce a moderate value of 0.6-1.2bar, and the power increase is even more significant. Although the mechanical system is still unable to break through the high range of 1.5 bar at this stage, and the turbine has already broken through the ultra-high pressure state of 2.2 bar. In terms of efficiency alone, the turbine system can use "multiples" to increase engine output, but the money, Maintenance and peripheral integration are also multiple times of the machine. Mechanical: In response to the problem of low intake efficiency of natural intake (NA) engines in the high-speed region, start from the most basic key point, that is, find ways to increase the air pressure in the intake manifold to overcome the valve interference resistance. Although the dimensions of the intake manifold, valve, and camshaft remain unchanged, as a result of the increase in the intake pressure, the amount of air that can be squeezed into the combustion chamber during each valve opening time increases, so the fuel injection amount can be relatively increased. Making the engine work more powerful than before, this is the basic principle of (Charge). Today's systems used in automobiles have two main types of machinery: Super Charge and Turbo Charge. This article will use mechanical methods and analyze their advantages and disadvantages. The structure of the machine (Super Charge) The machine is connected to the engine crankshaft with a belt. The engine speed is used to drive the internal blades of the machine to generate air and send it into the engine intake manifold. The overall structure is quite simple, and the operating temperature range is 70 -100 , unlike turbine driven by exhaust gas from engine, it must contact high temperature exhaust gas of 400 -900 , so the mechanical system has the same requirements for cooling system and lubricating grease as NA natural intake engine. It's the same. The characteristics of the machine (Super Charge) Because the machine is driven by a belt, the internal blade speed and engine speed are completely synchronized. The basic characteristics are: Engine rpm X (R1 / R2) = rpm of the blade R1 engine belt Radius of the disk R2 The radius of the belt pulley of the machine is not large due to the difference in the size of the belt pulleys of various engines and is limited by the engine installation space. Therefore, the working speed of the machine is much lower than 30,000 rpm, and the turbine is often above 100,000 rpm The situation of ultra-high turning range is very far away. At the same time, the speed of the machine is completely linked to the speed of the engine. The two appear to sit on the same level, forming a set of stable equal difference lines, and the engine and the engine will affect each other. When one side's operation is blocked, it must affect the operation of the other side through belt transmission. This is the characteristics of the machine. Due to the limitation of manufacturing cost, the maximum engine speed of commercially available vehicles is mostly maintained below 7500rpm. The ideal machine should be within the engine working area of 1000rpm-7500rpm, which produces a sufficient and stable value, which can increase the engine output by 20-40 %, So the machine must have an effect at low speed. Usually, once the engine leaves the idle speed range, it can drive the machine to produce an effect at 1000rpm-1300rpm, and continue to the maximum speed of the engine. Therefore, the overall curve shows a smooth and smooth rise. The curve, through the adjustment of the fuel supply program and the pressure relief valve, can achieve the goal of "high prototype" engine output power curve. However, there seems to be a small problem with the seemingly perfect mechanical system. Because the power source of the machine is completely driven by the engine, and the lighter the load on the engine, the faster the speed increase. This is why the RVs used in competitions are dismantled in advance. The reason for the compressor, if it is a formula car, even the activated motor and oil pump are changed to external connections to reduce the burden on the engine, so the operating resistance of the device itself must be as small as possible to avoid dragging Engine efficiency. However, the energy (value) generated by the device is directly proportional to the resistance. If the value is pursued blindly, although the energy output of the engine increases greatly, the internal blade resistance of the relative blade will also increase. When the resistance reaches a certain limit, the device The resistance itself will cause the engine to bear a huge burden and seriously affect the increase of the engine speed. Therefore, the designer must make a compromise between the value and the engine load to avoid the negative effects brought by the high system. At present, most of the mechanical systems produced in Europe adopt a low of 0.3-0.5kg / c, focusing on low-speed torque output and high-speed "high prototype" horsepower output, while the new low-impedance device developed by Taiwan "Tejia" can produce 0.6- With a medium value of 0.9kg / c, the power increase is even more significant. Although the mechanical system still cannot break through the high range of 1.0kg / c at this stage, the turbine has already broken through the super-border of 2.0kg / c. In terms of efficiency, the turbo system can use "multiples" to boost engine output, but the two are not structurally comparable. The high turbine system must allow the engine to withstand the drastic changes and high pressure from negative pressure to positive pressure. Therefore, the material and processing precision of the internal parts of the engine are very high. The requirements for the cooling and lubrication systems are much higher than those of ordinary engines. Short maintenance intervals, complicated procedures, short working life, etc. are all disadvantages of high-value turbine engines. In the case that the engine parts are maintained in the original form without the need to manufacture high unit price precision parts, the mechanical system can increase the engine power output by 20-40% without causing a burden on the maintenance system. There are plans to develop mechanical engines, such as: BENZ, Jaugar, Aston Martin, etc .. European advanced car manufacturers use mechanical systems to extend the production life of existing engines, and achieve environmental, fuel-saving, and high-efficiency goals to greatly save new Engine development costs. Types of machinery Machinery is divided into three types of centrifugal superchargers: This kind of machinery is similar to a turbine, except that it is not driven by the exhaust gas of the engine, but driven by the belt of the engine. It is the same principle as the turbine. The suction air pressurizes the air by centrifugal force to achieve the purpose of compressed air.

Basic machinery (Roots Superchargers): You can often see this on muscle cars from the 60s to 70s, and its protrusion from the hood is very obvious, just like the Mustang sports car in the picture. This machine sucks air into the inside of the inhaler, and two spiral blades compress the air before sending it to the intake manifold. This mechanical energy provides powerful torque output. It is very popular in accelerated races and street races. Screw Superchargers: This form of the device is derived from the basic type, and also looks very similar, but their suction compression method is quite different. When air is sucked into the inhaler, it is forced into the intake manifold by spiral blades. This type of device is effective for boosting horsepower at all speeds