What are the types of car turbochargers?- Zhejiang Jufeng Auto Parts Co., Ltd

1. Mechanical supercharging system: This device is installed on the engine and connected to the crankshaft of the engine by a belt. It obtains power from the output shaft of the engine to drive the rotor of the supercharger to rotate, thereby boosting the air into the intake manifold. The advantage is that the turbine speed is the same as the engine, so there is no lag, and the power output is very smooth. However, because it is installed in the rotating shaft of the engine, it still consumes part of the power, and the effect of supercharging is not high.
2. Air wave pressurization system: the pulse air wave of high-pressure exhaust gas is used to force air to be compressed. This kind of system has good supercharging performance and good acceleration, but the whole device is relatively heavy and not suitable for installation in smaller cars.
3. Exhaust gas turbocharging system: This is our most common turbocharging device. The turbocharger has no mechanical connection with the engine. It is actually an air compressor that increases the intake air volume by compressing air. It uses the inertial impulse of exhaust gas discharged from the engine to push the turbine in the turbine chamber, and the turbine drives the coaxial impeller. The impeller presses and sends the air sent from the air filter pipe to pressurize it into the cylinder. When the engine speed increases, the exhaust gas discharge speed and the wheel speed increase simultaneously, and the impeller compresses more air into the cylinder. The increase in air pressure and density can burn more fuel, and the corresponding increase in fuel volume can increase the engine. The output power. Generally speaking, the engine power and torque after installing an exhaust gas turbocharger should be increased by 20%-30%. However, the exhaust gas turbocharger technology also has its points that must be paid attention to, that is, the pump wheel and the turbine are connected by a shaft, that is, the rotor. The exhaust gas discharged from the engine drives the pump wheel. The pump wheel drives the turbine to rotate. The system is pressurized. The supercharger is installed on the exhaust side of the engine, so the working temperature of the supercharger is very high, and the rotor speed is very high when the supercharger is working, which can reach hundreds of thousands of revolutions per minute, such a high speed and temperature As a result, common mechanical needle rollers or ball bearings cannot work for the rotor. Therefore, turbochargers generally use full floating bearings, which are lubricated by engine oil, and coolants are used to cool the supercharger.
4. Compound supercharging system: that is, exhaust gas turbocharging and mechanical supercharging are used together. This kind of device is used in high-power diesel engines. Its engine output power is large, fuel consumption rate is low, and noise is small, but the structure is too complicated and the technology High content, maintenance is not easy, so it is difficult to popularize.

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