发起机的增压体系就是为了改善燃油的经济性，添加循环供油量，发起机在轿车的里边占据重要的方位，今天小编就要给我们介绍一下发起机增压体系类型。
The booster system of the engine is to improve the fuel economy and add the circulating fuel supply. The engine occupies an important position in the car. Today, I will introduce the type of booster system of the engine.
发起机增压体系类型：机械增压
Type of booster system: supercharging
结构：机械增压器由发起机曲轴经齿轮增速器驱动，或由曲轴齿形传动带轮经齿形传动带及电磁离合器驱动
Structure: the supercharger is driven by the starter crankshaft through gear speed increaser, or driven by the crankshaft toothed drive belt pulley and electromagnetic clutch
特点：机械增压能有效地进步发起机功率，与涡轮增压比较，其低速增压效果更好。另外，机械增压器与发起机容易匹配，结构也比较紧凑。可是，由于驱动增压器需耗费发起机功率，因而燃油耗费率比非增压发起机略高。
Features: supercharging can effectively improve the engine power, compared with turbocharging, its low-speed supercharging effect is better. In addition, the supercharger and the engine are easy to match, and the structure is relatively compact. However, the fuel consumption rate of the supercharger is slightly higher than that of the non supercharged one because it consumes the power of the engine.
发起机增压体系类型：气波增压
Type of booster system: gas wave supercharging
结构：由曲轴经传动带驱动气波增压器转子，使用排气压力波使空气遭到紧缩，以进步进气压力。
Structure: the crankshaft drives the rotor of the air wave supercharger through the transmission belt. The exhaust pressure wave is used to compress the air to improve the intake pressure.
特点：气波增压器结构简单，加工便利，作业温度不高，不需要耐热资料，也无需冷却。与涡轮增压比较，其低速转矩特性好，可是体积大，噪声水平高，安装方位遭到一定的约束。这种增压器还只能在低速范围内运用。由于柴油机转速比较低，因而多用于柴油机上。
Features: the structure of the gas wave supercharger is simple, the processing is convenient, the working temperature is not high, and there is no need for heat-resistant data and cooling. Compared with turbocharging, its low-speed torque characteristics are good, but the volume is large, the noise level is high, and the installation orientation is restricted. The supercharger can only be used in the low speed range. Because the maximum speed of diesel engine is relatively low, it is mostly used in diesel engine.
发起机增压体系类型：涡轮增压
Type of booster system: turbocharging
结构：使用废气涡轮机，带动与其同轴安装的压气机叶轮作业，新鲜空气在压气机内增压后进入气缸
Structure: the exhaust gas turbine is used to drive the compressor impeller which is installed in the same axis with it. The fresh air enters the cylinder after being pressurized in the compressor
特点：涡轮增压的长处是经济性比机械增压和非增压发起机都好，并可大幅度地降低有害气体的排放和噪声水平。涡轮增压的缺陷是低速时转矩添加不多，并且在发起机工况发生变化时，瞬态呼应差，致使轿车加快性，特别是低速加快性较差
Features: the advantage of turbocharging is that its economy is better than that of supercharged and non supercharged engines, and can greatly reduce the emission of harmful gases and noise level. The defect of turbocharging is that there is not much torque added at low speed, and the transient response is poor when the engine working condition changes, resulting in poor acceleration performance of car, especially at low speed
发起机增压体系类型：复合增压
Type of booster system: compound supercharging
结构：机械增压与涡轮增压适当结合
Structure: proper combination of supercharging and turbocharging
串联复合增压：在这种增压体系中，空气先经涡轮增压器进步压力后，进人中间冷却器降温，再经机械增压器增压。这种增压方式主要用于高增压发起机上
Series compound supercharging: in this kind of supercharging system, the air first advances the pressure through the turbocharger, then enters the intercooler to cool down, and then pressurizes by the supercharger. This kind of supercharging method is mainly used in high supercharging engine
并联复合增压：由机械增压器和涡轮增压器一起向发起机供应增压空气。在低转速范围主要靠机械增压，而在高转速范围主要靠涡轮增压。这种增压体系使发起机低速转矩特性得到改善
Parallel compound supercharging: supercharger and turbocharger supply charge air to the engine together. In the low speed range, it mainly relies on supercharging, while in the high speed range, it mainly relies on Turbocharging. This supercharging system improves the low speed torque characteristics of the engine
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